OMOP/OMOP_CDM_v5_3.csv

1	field	required	type	description	table
2	condition_occurrence_id	Yes	INTEGER	A unique identifier for each Condition Occurrence event.	condition_occurrence
3	person_id	Yes	INTEGER	A foreign key identifier to the Person who is experiencing the condition. The demographic details of that Person are stored in the PERSON table.	condition_occurrence
4	condition_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Condition Concept identifier in the Standardized Vocabularies.	condition_occurrence
5	condition_start_date	Yes	DATE	The date when the instance of the Condition is recorded.	condition_occurrence
6	condition_start_datetime	No	DATETIME	The date and time when the instance of the Condition is recorded.	condition_occurrence
7	condition_end_date	No	DATE	The date when the instance of the Condition is considered to have ended.	condition_occurrence
8	condition_end_datetime	No	DATE	The date when the instance of the Condition is considered to have ended.	condition_occurrence
9	condition_type_concept_id	Yes	INTEGER	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the source data from which the condition was recorded, the level of standardization, and the type of occurrence.	condition_occurrence
10	stop_reason	No	VARCHAR(20)	The reason that the condition was no longer present, as indicated in the source data.	condition_occurrence
11	provider_id	No	INTEGER	A foreign key to the Provider in the PROVIDER table who was responsible for capturing (diagnosing) the Condition.	condition_occurrence
12	visit_occurrence_id	No	INTEGER	A foreign key to the visit in the VISIT_OCCURRENCE table during which the Condition was determined (diagnosed).	condition_occurrence
13	visit_detail_id	No	INTEGER	A foreign key to the visit in the VISIT_DETAIL table during which the Condition was determined (diagnosed).	condition_occurrence
14	condition_source_value	No	VARCHAR(50)	The source code for the condition as it appears in the source data. This code is mapped to a standard condition concept in the Standardized Vocabularies and the original code is stored here for reference.	condition_occurrence
15	condition_source_concept_id	No	INTEGER	A foreign key to a Condition Concept that refers to the code used in the source.	condition_occurrence
16	condition_status_source_value	No	VARCHAR(50)	The source code for the condition status as it appears in the source data.	condition_occurrence
17	condition_status_concept_id	No	INTEGER	A foreign key to the predefined Concept in the Standard Vocabulary reflecting the condition status	condition_occurrence
18	person_id	Yes	INTEGER	A foreign key identifier to the deceased person. The demographic details of that person are stored in the person table.	death
19	death_date	Yes	DATE	The date the person was deceased. If the precise date including day or month is not known or not allowed, December is used as the default month, and the last day of the month the default day.	death
20	death_datetime	No	DATETIME	The date and time the person was deceased. If the precise date including day or month is not known or not allowed, December is used as the default month, and the last day of the month the default day.	death
21	death_type_concept_id	Yes	INTEGER	A foreign key referring to the predefined concept identifier in the Standardized Vocabularies reflecting how the death was represented in the source data.	death
22	cause_concept_id	No	INTEGER	A foreign key referring to a standard concept identifier in the Standardized Vocabularies for conditions.	death
23	cause_source_value	No	VARCHAR(50)	The source code for the cause of death as it appears in the source data. This code is mapped to a standard concept in the Standardized Vocabularies and the original code is, stored here for reference.	death
24	cause_source_concept_id	No	INTEGER	A foreign key to the concept that refers to the code used in the source. Note, this variable name is abbreviated to ensure it will be allowable across database platforms.	death
25	device_exposure_id	Yes	INTEGER	A system-generated unique identifier for each Device Exposure.	device_exposure
26	person_id	Yes	INTEGER	A foreign key identifier to the Person who is subjected to the Device. The demographic details of that person are stored in the Person table.	device_exposure
27	device_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the Device concept.	device_exposure
28	device_exposure_start_date	Yes	DATE	The date the Device or supply was applied or used.	device_exposure
29	device_exposure_start_datetime	No	DATETIME	The date and time the Device or supply was applied or used.	device_exposure
30	device_exposure_end_date	No	DATE	The date the Device or supply was removed from use.	device_exposure
31	device_exposure_end_datetime	No	DATETIME	The date and time the Device or supply was removed from use.	device_exposure
32	device_type_concept_id	Yes	INTEGER	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of Device Exposure recorded. It indicates how the Device Exposure was represented in the source data.	device_exposure
33	unique_device_id	No	VARCHAR(50)	A UDI or equivalent identifying the instance of the Device used in the Person.	device_exposure
34	quantity	No	INTEGER	The number of individual Devices used for the exposure.	device_exposure
35	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who initiated of administered the Device.	device_exposure
36	visit_occurrence_id	No	INTEGER	A foreign key to the visit in the VISIT_OCCURRENCE table during which the device was used.	device_exposure
37	visit_detail_id	No	INTEGER	A foreign key to the visit detail in the VISIT_DETAIL table during which the Drug Exposure was initiated.	device_exposure
38	device_source_value	No	VARCHAR(50)	The source code for the Device as it appears in the source data. This code is mapped to a standard Device Concept in the Standardized Vocabularies and the original code is stored here for reference.	device_exposure
39	device_source_ concept_id	No	INTEGER	A foreign key to a Device Concept that refers to the code used in the source.	device_exposure
40	drug_exposure_id	Yes	INTEGER	A system-generated unique identifier for each Drug utilization event.	drug_exposure
41	person_id	Yes	INTEGER	A foreign key identifier to the person who is subjected to the Drug. The demographic details of that person are stored in the person table.	drug_exposure
42	drug_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the Drug concept.	drug_exposure
43	drug_exposure_start_date	Yes	DATE	The start date for the current instance of Drug utilization. Valid entries include a start date of a prescription, the date a prescription was filled, or the date on which a Drug administration procedure was recorded.	drug_exposure
44	drug_exposure_start_datetime	No	DATETIME	The start date and time for the current instance of Drug utilization. Valid entries include a start date of a prescription, the date a prescription was filled, or the date on which a Drug administration procedure was recorded.	drug_exposure
45	drug_exposure_end_date	Yes	DATE	The end date for the current instance of Drug utilization. It is not available from all sources.	drug_exposure
46	drug_exposure_end_datetime	No	DATETIME	The end date and time for the current instance of Drug utilization. It is not available from all sources.	drug_exposure
47	verbatim_end_date	No	DATE	The known end date of a drug_exposure as provided by the source	drug_exposure
48	drug_type_concept_id	Yes	INTEGER	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of Drug Exposure recorded. It indicates how the Drug Exposure was represented in the source data.	drug_exposure
49	stop_reason	No	VARCHAR(20)	The reason the Drug was stopped. Reasons include regimen completed, changed, removed, etc.	drug_exposure
50	refills	No	INTEGER	The number of refills after the initial prescription. The initial prescription is not counted, values start with 0.	drug_exposure
51	quantity	No	FLOAT	The quantity of drug as recorded in the original prescription or dispensing record.	drug_exposure
52	days_supply	No	INTEGER	The number of days of supply of the medication as recorded in the original prescription or dispensing record.	drug_exposure
53	sig	No	VARCHAR(MAX)	The directions ("signetur") on the Drug prescription as recorded in the original prescription (and printed on the container) or dispensing record.	drug_exposure
54	route_concept_id	No	INTEGER	A foreign key to a predefined concept in the Standardized Vocabularies reflecting the route of administration.	drug_exposure
55	lot_number	No	VARCHAR(50)	An identifier assigned to a particular quantity or lot of Drug product from the manufacturer.	drug_exposure
56	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who initiated (prescribed or administered) the Drug Exposure.	drug_exposure
57	visit_occurrence_id	No	INTEGER	A foreign key to the Visit in the VISIT_OCCURRENCE table during which the Drug Exposure was initiated.	drug_exposure
58	visit_detail_id	No	INTEGER	A foreign key to the Visit Detail in the VISIT_DETAIL table during which the Drug Exposure was initiated.	drug_exposure
59	drug_source_value	No	VARCHAR(50)	The source code for the Drug as it appears in the source data. This code is mapped to a Standard Drug concept in the Standardized Vocabularies and the original code is, stored here for reference.	drug_exposure
60	drug_source_concept_id	No	INTEGER	A foreign key to a Drug Concept that refers to the code used in the source.	drug_exposure
61	route_source_value	No	VARCHAR(50)	The information about the route of administration as detailed in the source.	drug_exposure
62	dose_unit_source_value	No	VARCHAR(50)	The information about the dose unit as detailed in the source.	drug_exposure
63	domain_concept_id_1	Yes	INTEGER	The concept representing the domain of fact one, from which the corresponding table can be inferred.	fact_relationship
64	fact_id_1	Yes	INTEGER	The unique identifier in the table corresponding to the domain of fact one.	fact_relationship
65	domain_concept_id_2	Yes	INTEGER	The concept representing the domain of fact two, from which the corresponding table can be inferred.	fact_relationship
66	fact_id_2	Yes	INTEGER	The unique identifier in the table corresponding to the domain of fact two.	fact_relationship
67	relationship_concept_id	Yes	INTEGER	A foreign key to a Standard Concept ID of relationship in the Standardized Vocabularies.	fact_relationship
68	measurement_id	Yes	INTEGER	A unique identifier for each Measurement.	measurement
69	person_id	Yes	INTEGER	A foreign key identifier to the Person about whom the measurement was recorded. The demographic details of that Person are stored in the PERSON table.	measurement
70	measurement_concept_id	Yes	INTEGER	A foreign key to the standard measurement concept identifier in the Standardized Vocabularies.	measurement
71	measurement_date	Yes	DATE	The date of the Measurement.	measurement
72	measurement_datetime	No	DATETIME	The date and time of the Measurement. Some database systems don't have a datatype of time. To accomodate all temporal analyses, datatype datetime can be used (combining measurement_date and measurement_time [forum discussion](http://forums.ohdsi.org/t/date-time-and-datetime-problem-and-the-world-of-hours-and-1day/314))	measurement
73	measurement_type_concept_id	Yes	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the provenance from where the Measurement record was recorded.	measurement
74	operator_concept_id	No	INTEGER	A foreign key identifier to the predefined Concept in the Standardized Vocabularies reflecting the mathematical operator that is applied to the value_as_number. Operators are <, <=, =, >=, >.	measurement
75	value_as_number	No	FLOAT	A Measurement result where the result is expressed as a numeric value.	measurement
76	value_as_concept_id	No	INTEGER	A foreign key to a Measurement result represented as a Concept from the Standardized Vocabularies (e.g., positive/negative, present/absent, low/high, etc.).	measurement
77	unit_concept_id	No	INTEGER	A foreign key to a Standard Concept ID of Measurement Units in the Standardized Vocabularies.	measurement
78	range_low	No	FLOAT	The lower limit of the normal range of the Measurement result. The lower range is assumed to be of the same unit of measure as the Measurement value.	measurement
79	range_high	No	FLOAT	The upper limit of the normal range of the Measurement. The upper range is assumed to be of the same unit of measure as the Measurement value.	measurement
80	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who was responsible for initiating or obtaining the measurement.	measurement
81	visit_occurrence_id	No	INTEGER	A foreign key to the Visit in the VISIT_OCCURRENCE table during which the Measurement was recorded.	measurement
82	visit_detail_id	No	INTEGER	A foreign key to the Visit Detail in the VISIT_DETAIL table during which the Measurement was recorded.	measurement
83	measurement_source_value	No	VARCHAR(50)	The Measurement name as it appears in the source data. This code is mapped to a Standard Concept in the Standardized Vocabularies and the original code is stored here for reference.	measurement
84	measurement_source_concept_id	No	INTEGER	A foreign key to a Concept in the Standard Vocabularies that refers to the code used in the source.	measurement
85	unit_source_value	No	VARCHAR(50)	The source code for the unit as it appears in the source data. This code is mapped to a standard unit concept in the Standardized Vocabularies and the original code is stored here for reference.	measurement
86	value_source_value	No	VARCHAR(50)	The source value associated with the content of the value_as_number or value_as_concept_id as stored in the source data.	measurement
87	note_id	Yes	INTEGER	A unique identifier for each note.	note
88	person_id	Yes	INTEGER	A foreign key identifier to the Person about whom the Note was recorded. The demographic details of that Person are stored in the PERSON table.	note
89	note_date	Yes	DATE	The date the note was recorded.	note
90	note_datetime	No	DATETIME	The date and time the note was recorded.	note
91	note_type_concept_id	Yes	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the type, origin or provenance of the Note.	note
92	note_class_concept_id	Yes	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the HL7 LOINC Document Type Vocabulary classification of the note.	note
93	note_title	No	VARCHAR(250)	The title of the Note as it appears in the source.	note
94	note_text	Yes	VARCHAR(MAX)	The content of the Note.	note
95	encoding_concept_id	Yes	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the note character encoding type	note
96	language_concept_id	Yes	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the language of the note	note
97	provider_id	No	INTEGER	A foreign key to the Provider in the PROVIDER table who took the Note.	note
98	visit_occurrence_id	No	INTEGER	A foreign key to the Visit in the VISIT_OCCURRENCE table when the Note was taken.	note
99	visit_detail_id	No	INTEGER	A foreign key to the Visit in the VISIT_DETAIL table when the Note was taken.	note
100	note_source_value	No	VARCHAR(50)	The source value associated with the origin of the Note	note
101	note_nlp_id	Yes	INTEGER	A unique identifier for each term extracted from a note.	note_nlp
102	note_id	Yes	INTEGER	A foreign key to the Note table note the term was extracted from.	note_nlp
103	section_concept_id	No	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies representing the section of the extracted term.	note_nlp
104	snippet	No	VARCHAR(250)	A small window of text surrounding the term.	note_nlp
105	offset	No	VARCHAR(50)	Character offset of the extracted term in the input note.	note_nlp
106	lexical_variant	Yes	VARCHAR(250)	Raw text extracted from the NLP tool.	note_nlp
107	note_nlp_concept_id	No	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the normalized concept for the extracted term. Domain of the term is represented as part of the Concept table.	note_nlp
108	note_nlp_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code in the source vocabulary used by the NLP system	note_nlp
109	nlp_system	No	VARCHAR(250)	Name and version of the NLP system that extracted the term.Useful for data provenance.	note_nlp
110	nlp_date	Yes	DATE	The date of the note processing.Useful for data provenance.	note_nlp
111	nlp_date_time	No	DATETIME	The date and time of the note processing. Useful for data provenance.	note_nlp
112	term_exists	No	VARCHAR(1)	A summary modifier that signifies presence or absence of the term for a given patient. Useful for quick querying. *	note_nlp
113	term_temporal	No	VARCHAR(50)	An optional time modifier associated with the extracted term. (for now <20>past<73> or <20>present<6E> only). Standardize it later.	note_nlp
114	term_modifiers	No	VARCHAR(2000)	A compact description of all the modifiers of the specific term extracted by the NLP system. (e.g. <20>son has rash<73> ? <20>negated=no,subject=family, certainty=undef,conditional=false,general=false<73>).	note_nlp
115	observation_id	Yes	INTEGER	A unique identifier for each observation.	observation
116	person_id	Yes	INTEGER	A foreign key identifier to the Person about whom the observation was recorded. The demographic details of that Person are stored in the PERSON table.	observation
117	observation_concept_id	Yes	INTEGER	A foreign key to the standard observation concept identifier in the Standardized Vocabularies.	observation
118	observation_date	Yes	DATE	The date of the observation.	observation
119	observation_datetime	No	DATETIME	The date and time of the observation.	observation
120	observation_type_concept_id	Yes	INTEGER	A foreign key to the predefined concept identifier in the Standardized Vocabularies reflecting the type of the observation.	observation
121	value_as_number	No	FLOAT	The observation result stored as a number. This is applicable to observations where the result is expressed as a numeric value.	observation
122	value_as_string	No	VARCHAR(60)	The observation result stored as a string. This is applicable to observations where the result is expressed as verbatim text.	observation
123	value_as_concept_id	No	INTEGER	A foreign key to an observation result stored as a Concept ID. This is applicable to observations where the result can be expressed as a Standard Concept from the Standardized Vocabularies (e.g., positive/negative, present/absent, low/high, etc.).	observation
124	qualifier_concept_id	No	INTEGER	A foreign key to a Standard Concept ID for a qualifier (e.g., severity of drug-drug interaction alert)	observation
125	unit_concept_id	No	INTEGER	A foreign key to a Standard Concept ID of measurement units in the Standardized Vocabularies.	observation
126	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who was responsible for making the observation.	observation
127	visit_occurrence_id	No	INTEGER	A foreign key to the visit in the VISIT_OCCURRENCE table during which the observation was recorded.	observation
128	visit_detail_id	No	INTEGER	A foreign key to the visit in the VISIT_DETAIL table during which the observation was recorded.	observation
129	observation_source_value	No	VARCHAR(50)	The observation code as it appears in the source data. This code is mapped to a Standard Concept in the Standardized Vocabularies and the original code is, stored here for reference.	observation
130	observation_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	observation
131	unit_source_value	No	VARCHAR(50)	The source code for the unit as it appears in the source data. This code is mapped to a standard unit concept in the Standardized Vocabularies and the original code is, stored here for reference.	observation
132	qualifier_source_value	No	VARCHAR(50)	The source value associated with a qualifier to characterize the observation	observation
133	observation_period_id	Yes	INTEGER	A unique identifier for each observation period.	observation_period
134	person_id	Yes	INTEGER	A foreign key identifier to the person for whom the observation period is defined. The demographic details of that person are stored in the person table.	observation_period
135	observation_period_start_date	Yes	DATE	The start date of the observation period for which data are available from the data source.	observation_period
136	observation_period_end_date	Yes	DATE	The end date of the observation period for which data are available from the data source.	observation_period
137	period_type_concept_id	Yes	INTEGER	A foreign key identifier to the predefined concept in the Standardized Vocabularies reflecting the source of the observation period information	observation_period
138	person_id	Yes	INTEGER	A unique identifier for each person.	person
139	gender_concept_id	Yes	INTEGER	A foreign key that refers to an identifier in the CONCEPT table for the unique gender of the person.	person
140	year_of_birth	Yes	INTEGER	The year of birth of the person. For data sources with date of birth, the year is extracted. For data sources where the year of birth is not available, the approximate year of birth is derived based on any age group categorization available.	person
141	month_of_birth	No	INTEGER	The month of birth of the person. For data sources that provide the precise date of birth, the month is extracted and stored in this field.	person
142	day_of_birth	No	INTEGER	The day of the month of birth of the person. For data sources that provide the precise date of birth, the day is extracted and stored in this field.	person
143	birth_datetime	No	DATETIME	The date and time of birth of the person.	person
144	race_concept_id	Yes	INTEGER	A foreign key that refers to an identifier in the CONCEPT table for the unique race of the person.	person
145	ethnicity_concept_id	Yes	INTEGER	A foreign key that refers to the standard concept identifier in the Standardized Vocabularies for the ethnicity of the person.	person
146	location_id	No	INTEGER	A foreign key to the place of residency for the person in the location table, where the detailed address information is stored.	person
147	provider_id	No	INTEGER	A foreign key to the primary care provider the person is seeing in the provider table.	person
148	care_site_id	No	INTEGER	A foreign key to the site of primary care in the care_site table, where the details of the care site are stored.	person
149	person_source_value	No	VARCHAR(50)	An (encrypted) key derived from the person identifier in the source data. This is necessary when a use case requires a link back to the person data at the source dataset.	person
150	gender_source_value	No	VARCHAR(50)	The source code for the gender of the person as it appears in the source data. The person’s gender is mapped to a standard gender concept in the Standardized Vocabularies; the original value is stored here for reference.	person
151	gender_source_concept_id	No	INTEGER	A foreign key to the gender concept that refers to the code used in the source.	person
152	race_source_value	No	VARCHAR(50)	The source code for the race of the person as it appears in the source data. The person race is mapped to a standard race concept in the Standardized Vocabularies and the original value is stored here for reference.	person
153	race_source_concept_id	No	INTEGER	A foreign key to the race concept that refers to the code used in the source.	person
154	ethnicity_source_value	No	VARCHAR(50)	The source code for the ethnicity of the person as it appears in the source data. The person ethnicity is mapped to a standard ethnicity concept in the Standardized Vocabularies and the original code is, stored here for reference.	person
155	ethnicity_source_concept_id	No	INTEGER	A foreign key to the ethnicity concept that refers to the code used in the source.	person
156	procedure_occurrence_id	Yes	INTEGER	A system-generated unique identifier for each Procedure Occurrence.	procedure_occurrence
157	person_id	Yes	INTEGER	A foreign key identifier to the Person who is subjected to the Procedure. The demographic details of that Person are stored in the PERSON table.	procedure_occurrence
158	procedure_concept_id	Yes	INTEGER	A foreign key that refers to a standard procedure Concept identifier in the Standardized Vocabularies.	procedure_occurrence
159	procedure_date	Yes	DATE	The date on which the Procedure was performed.	procedure_occurrence
160	procedure_datetime	No	DATETIME	The date and time on which the Procedure was performed.	procedure_occurrence
161	procedure_type_concept_id	Yes	INTEGER	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of source data from which the procedure record is derived.	procedure_occurrence
162	modifier_concept_id	No	INTEGER	A foreign key to a Standard Concept identifier for a modifier to the Procedure (e.g. bilateral)	procedure_occurrence
163	quantity	No	INTEGER	The quantity of procedures ordered or administered.	procedure_occurrence
164	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who was responsible for carrying out the procedure.	procedure_occurrence
165	visit_occurrence_id	No	INTEGER	A foreign key to the Visit in the VISIT_OCCURRENCE table during which the Procedure was carried out.	procedure_occurrence
166	visit_detail_id	No	INTEGER	A foreign key to the Visit Detail in the VISIT_DETAIL table during which the Procedure was carried out.	procedure_occurrence
167	procedure_source_value	No	VARCHAR(50)	The source code for the Procedure as it appears in the source data. This code is mapped to a standard procedure Concept in the Standardized Vocabularies and the original code is, stored here for reference. Procedure source codes are typically ICD-9-Proc, CPT-4, HCPCS or OPCS-4 codes.	procedure_occurrence
168	procedure_source_concept_id	No	INTEGER	A foreign key to a Procedure Concept that refers to the code used in the source.	procedure_occurrence
169	modifier_source_value	No	VARCHAR(50)	The source code for the qualifier as it appears in the source data.	procedure_occurrence
170	specimen_id	Yes	INTEGER	A unique identifier for each specimen.	specimen
171	person_id	Yes	INTEGER	A foreign key identifier to the Person for whom the Specimen is recorded.	specimen
172	specimen_concept_id	Yes	INTEGER	A foreign key referring to a Standard Concept identifier in the Standardized Vocabularies for the Specimen.	specimen
173	specimen_type_concept_id	Yes	INTEGER	A foreign key referring to the Concept identifier in the Standardized Vocabularies reflecting the system of record from which the Specimen was represented in the source data.	specimen
174	specimen_date	Yes	DATE	The date the specimen was obtained from the Person.	specimen
175	specimen_datetime	No	DATETIME	The date and time on the date when the Specimen was obtained from the person.	specimen
176	quantity	No	FLOAT	The amount of specimen collection from the person during the sampling procedure.	specimen
177	unit_concept_id	No	INTEGER	A foreign key to a Standard Concept identifier for the Unit associated with the numeric quantity of the Specimen collection.	specimen
178	anatomic_site_concept_id	No	INTEGER	A foreign key to a Standard Concept identifier for the anatomic location of specimen collection.	specimen
179	disease_status_concept_id	No	INTEGER	A foreign key to a Standard Concept identifier for the Disease Status of specimen collection.	specimen
180	specimen_source_id	No	VARCHAR(50)	The Specimen identifier as it appears in the source data.	specimen
181	specimen_source_value	No	VARCHAR(50)	The Specimen value as it appears in the source data. This value is mapped to a Standard Concept in the Standardized Vocabularies and the original code is, stored here for reference.	specimen
182	unit_source_value	No	VARCHAR(50)	The information about the Unit as detailed in the source.	specimen
183	anatomic_site_source_value	No	VARCHAR(50)	The information about the anatomic site as detailed in the source.	specimen
184	disease_status_source_value	No	VARCHAR(50)	The information about the disease status as detailed in the source.	specimen
185	visit_detail_id	Yes	INTEGER	A unique identifier for each Person's visit or encounter at a healthcare provider.	visit_detail
186	person_id	Yes	INTEGER	A foreign key identifier to the Person for whom the visit is recorded. The demographic details of that Person are stored in the PERSON table.	visit_detail
187	visit_concept_id	Yes	INTEGER	A foreign key that refers to a visit Concept identifier in the Standardized Vocabularies.	visit_detail
188	visit_start_date	Yes	DATE	The start date of the visit.	visit_detail
189	visit_start_datetime	No	DATETIME	The date and time of the visit started.	visit_detail
190	visit_end_date	Yes	DATE	The end date of the visit. If this is a one-day visit the end date should match the start date.	visit_detail
191	visit_end_datetime	No	DATETIME	The date and time of the visit end.	visit_detail
192	visit_type_concept_id	Yes	INTEGER	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of source data from which the visit record is derived.	visit_detail
193	provider_id	No	INTEGER	A foreign key to the provider in the provider table who was associated with the visit.	visit_detail
194	care_site_id	No	INTEGER	A foreign key to the care site in the care site table that was visited.	visit_detail
195	visit_source_value	No	STRING(50)	The source code for the visit as it appears in the source data.	visit_detail
196	visit_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	visit_detail
197	admitting_source_value	Varchar(50)	NO	The source code for the admitting source as it appears in the source data.	visit_detail
198	admitting_source_concept_id	Integer	NO	A foreign key to the predefined concept in the Place of Service Vocabulary reflecting the admitting source for a visit.	visit_detail
199	discharge_to_source_value	Varchar(50)	NO	The source code for the discharge disposition as it appears in the source data.	visit_detail
200	discharge_to_concept_id	Integer	NO	A foreign key to the predefined concept in the Place of Service Vocabulary reflecting the discharge disposition for a visit.	visit_detail
201	preceding_visit_detail_id	Integer	NO	A foreign key to the VISIT_DETAIL table of the visit immediately preceding this visit	visit_detail
202	visit_detail_parent_id	Integer	NO	A foreign key to the VISIT_DETAIL table record to represent the immediate parent visit-detail record.	visit_detail
203	visit_occurrence_id	Integer	YES	A foreign key that refers to the record in the VISIT_OCCURRENCE table. This is a required field, because for every visit_detail is a child of visit_occurrence and cannot exist without a corresponding parent record in visit_occurrence.	visit_detail
204	visit_occurrence_id	Yes	INTEGER	A unique identifier for each Person's visit or encounter at a healthcare provider.	visit_occurrence
205	person_id	Yes	INTEGER	A foreign key identifier to the Person for whom the visit is recorded. The demographic details of that Person are stored in the PERSON table.	visit_occurrence
206	visit_concept_id	Yes	INTEGER	A foreign key that refers to a visit Concept identifier in the Standardized Vocabularies.	visit_occurrence
207	visit_start_date	Yes	DATE	The start date of the visit.	visit_occurrence
208	visit_start_datetime	No	DATETIME	The date and time of the visit started.	visit_occurrence
209	visit_end_date	Yes	DATE	The end date of the visit. If this is a one-day visit the end date should match the start date.	visit_occurrence
210	visit_end_datetime	No	DATETIME	The date and time of the visit end.	visit_occurrence
211	visit_type_concept_id	Yes	INTEGER	A foreign key to the predefined Concept identifier in the Standardized Vocabularies reflecting the type of source data from which the visit record is derived.	visit_occurrence
212	provider_id	No	INTEGER	A foreign key to the provider in the provider table who was associated with the visit.	visit_occurrence
213	care_site_id	No	INTEGER	A foreign key to the care site in the care site table that was visited.	visit_occurrence
214	visit_source_value	No	VARCHAR(50)	The source code for the visit as it appears in the source data.	visit_occurrence
215	visit_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	visit_occurrence
216	admitting_source_concept_id	integer	NO	A foreign key to the predefined concept in the Place of Service Vocabulary reflecting the admitting source for a visit.	visit_occurrence
217	admitting_source_value	varchar(50)	NO	The source code for the admitting source as it appears in the source data.	visit_occurrence
218	discharge_to_concept_id	integer	NO	A foreign key to the predefined concept in the Place of Service Vocabulary reflecting the discharge disposition for a visit.	visit_occurrence
219	discharge_to_source_value	varchar(50)	NO	The source code for the discharge disposition as it appears in the source data.	visit_occurrence
220	preceding_visit_occurrence_id	integer	NO	A foreign key to the VISIT_OCCURRENCE table of the visit immediately preceding this visit	visit_occurrence
221	cohort_definition_id	Yes	INTEGER	A foreign key to a record in the COHORT_DEFINITION table containing relevant Cohort Definition information.	cohort
222	subject_id	Yes	INTEGER	A foreign key to the subject in the cohort. These could be referring to records in the PERSON, PROVIDER, VISIT_OCCURRENCE table.	cohort
223	cohort_start_date	Yes	DATE	The date when the Cohort Definition criteria for the Person, Provider or Visit first match.	cohort
224	cohort_end_date	Yes	DATE	The date when the Cohort Definition criteria for the Person, Provider or Visit no longer match or the Cohort membership was terminated.	cohort
225	cohort_definition_id	Yes	INTEGER	A foreign key to a record in the [COHORT_DEFINITION](https://github.com/OHDSI/CommonDataModel/wiki/COHORT_DEFINITION) table containing relevant Cohort Definition information.	cohort_attribute
226	subject_id	Yes	INTEGER	A foreign key to the subject in the Cohort. These could be referring to records in the PERSON, PROVIDER, VISIT_OCCURRENCE table.	cohort_attribute
227	cohort_start_date	Yes	DATE	The date when the Cohort Definition criteria for the Person, Provider or Visit first match.	cohort_attribute
228	cohort_end_date	Yes	DATE	The date when the Cohort Definition criteria for the Person, Provider or Visit no longer match or the Cohort membership was terminated.	cohort_attribute
229	attribute_definition_id	Yes	INTEGER	A foreign key to a record in the [ATTRIBUTE_DEFINITION](https://github.com/OHDSI/CommonDataModel/wiki/ATTRIBUTE_DEFINITION) table containing relevant Attribute Definition information.	cohort_attribute
230	value_as_number	No	FLOAT	The attribute result stored as a number. This is applicable to attributes where the result is expressed as a numeric value.	cohort_attribute
231	value_as_concept_id	No	INTEGER	The attribute result stored as a Concept ID. This is applicable to attributes where the result is expressed as a categorical value.	cohort_attribute
232	condition_era_id	Yes	INTEGER	A unique identifier for each Condition Era.	condition_era
233	person_id	Yes	INTEGER	A foreign key identifier to the Person who is experiencing the Condition during the Condition Era. The demographic details of that Person are stored in the PERSON table.	condition_era
234	condition_concept_id	Yes	INTEGER	A foreign key that refers to a standard Condition Concept identifier in the Standardized Vocabularies.	condition_era
235	condition_era_start_date	Yes	DATE	The start date for the Condition Era constructed from the individual instances of Condition Occurrences. It is the start date of the very first chronologically recorded instance of the condition.	condition_era
236	condition_era_end_date	Yes	DATE	The end date for the Condition Era constructed from the individual instances of Condition Occurrences. It is the end date of the final continuously recorded instance of the Condition.	condition_era
237	condition_occurrence_count	No	INTEGER	The number of individual Condition Occurrences used to construct the condition era.	condition_era
238	dose_era_id	Yes	INTEGER	A unique identifier for each Dose Era.	dose_era
239	person_id	Yes	INTEGER	A foreign key identifier to the Person who is subjected to the drug during the drug era. The demographic details of that Person are stored in the PERSON table.	dose_era
240	drug_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the active Ingredient Concept.	dose_era
241	unit_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the unit concept.	dose_era
242	dose_value	Yes	FLOAT	The numeric value of the dose.	dose_era
243	dose_era_start_date	Yes	DATE	The start date for the drug era constructed from the individual instances of drug exposures. It is the start date of the very first chronologically recorded instance of utilization of a drug.	dose_era
244	dose_era_end_date	Yes	DATE	The end date for the drug era constructed from the individual instance of drug exposures. It is the end date of the final continuously recorded instance of utilization of a drug.	dose_era
245	drug_era_id	Yes	INTEGER	A unique identifier for each Drug Era.	drug_era
246	person_id	Yes	INTEGER	A foreign key identifier to the Person who is subjected to the Drug during the fDrug Era. The demographic details of that Person are stored in the PERSON table.	drug_era
247	drug_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Concept identifier in the Standardized Vocabularies for the Ingredient Concept.	drug_era
248	drug_era_start_date	Yes	DATE	The start date for the Drug Era constructed from the individual instances of Drug Exposures. It is the start date of the very first chronologically recorded instance of conutilization of a Drug.	drug_era
249	drug_era_end_date	Yes	DATE	The end date for the drug era constructed from the individual instance of drug exposures. It is the end date of the final continuously recorded instance of utilization of a drug.	drug_era
250	drug_exposure_count	No	INTEGER	The number of individual Drug Exposure occurrences used to construct the Drug Era.	drug_era
251	gap_days	No	INTEGER	The number of days that are not covered by DRUG_EXPOSURE records that were used to make up the era record.	drug_era
252	cost_id	Yes	INTEGER	A unique identifier for each COST record.	cost
253	cost_event_id	Yes	INTEGER	A foreign key identifier to the event (e.g. Measurement, Procedure, Visit, Drug Exposure, etc) record for which cost data are recorded.	cost
254	cost_domain_id	Yes	VARCHAR(20)	The concept representing the domain of the cost event, from which the corresponding table can be inferred that contains the entity for which cost information is recorded.	cost
255	cost_type_concept_id	Yes	INTEGER	A foreign key identifier to a concept in the CONCEPT table for the provenance or the source of the COST data: Calculated from insurance claim information, provider revenue, calculated from cost-to-charge ratio, reported from accounting database, etc.	cost
256	currency_concept_id	No	INTEGER	A foreign key identifier to the concept representing the 3-letter code used to delineate international currencies, such as USD for US Dollar.	cost
257	total_charge	No	FLOAT	The total amount charged by some provider of goods or services (e.g. hospital, physician pharmacy, dme provider) to payers (insurance companies, the patient).	cost
258	total_cost	No	FLOAT	The cost incurred by the provider of goods or services.	cost
259	total_paid	No	FLOAT	The total amount actually paid from all payers for goods or services of the provider.	cost
260	paid_by_payer	No	FLOAT	The amount paid by the Payer for the goods or services.	cost
261	paid_by_patient	No	FLOAT	The total amount paid by the Person as a share of the expenses.	cost
262	paid_patient_copay	No	FLOAT	The amount paid by the Person as a fixed contribution to the expenses.	cost
263	paid_patient_coinsurance	No	FLOAT	The amount paid by the Person as a joint assumption of risk. Typically, this is a percentage of the expenses defined by the Payer Plan after the Person's deductible is exceeded.	cost
264	paid_patient_deductible	No	FLOAT	The amount paid by the Person that is counted toward the deductible defined by the Payer Plan. paid_patient_deductible does contribute to the paid_by_patient variable.	cost
265	paid_by_primary	No	FLOAT	The amount paid by a primary Payer through the coordination of benefits.	cost
266	paid_ingredient_cost	No	FLOAT	The amount paid by the Payer to a pharmacy for the drug, excluding the amount paid for dispensing the drug. paid_ingredient_cost contributes to the paid_by_payer field if this field is populated with a nonzero value.	cost
267	paid_dispensing_fee	No	FLOAT	The amount paid by the Payer to a pharmacy for dispensing a drug, excluding the amount paid for the drug ingredient. paid_dispensing_fee contributes to the paid_by_payer field if this field is populated with a nonzero value.	cost
268	payer_plan_period_id	No	INTEGER	A foreign key to the PAYER_PLAN_PERIOD table, where the details of the Payer, Plan and Family are stored. Record the payer_plan_id that relates to the payer who contributed to the paid_by_payer field.	cost
269	amount_allowed	No	FLOAT	The contracted amount agreed between the payer and provider.	cost
270	revenue_code_concept_id	No	INTEGER	A foreign key referring to a Standard Concept ID in the Standardized Vocabularies for Revenue codes.	cost
271	revenue_code_source_value	No	VARCHAR(50)	The source code for the Revenue code as it appears in the source data, stored here for reference.	cost
272	drg_concept_id	No	INTEGER	A foreign key to the predefined concept in the DRG Vocabulary reflecting the DRG for a visit.	cost
273	drg_source_value	No	VARCHAR(3)	The 3-digit DRG source code as it appears in the source data.	cost
274	payer_plan_period_id	Yes	INTEGER	A identifier for each unique combination of payer, plan, family code and time span.	payer_plan_period
275	person_id	Yes	INTEGER	A foreign key identifier to the Person covered by the payer. The demographic details of that Person are stored in the PERSON table.	payer_plan_period
276	payer_plan_period_start_date	Yes	DATE	The start date of the payer plan period.	payer_plan_period
277	payer_plan_period_end_date	Yes	DATE	The end date of the payer plan period.	payer_plan_period
278	payer_concept_id	No	INTEGER	A foreign key that refers to a standard Payer concept identifier in the Standarized Vocabularies	payer_plan_period
279	payer_source_value	No	VARCHAR(50)	The source code for the payer as it appears in the source data.	payer_plan_period
280	payer_source_concept_id	No	INTEGER	A foreign key to a payer concept that refers to the code used in the source.	payer_plan_period
281	plan_concept_id	No	INTEGER	A foreign key that refers to a standard plan concept identifier that represents the health benefit plan in the Standardized Vocabularies	payer_plan_period
282	plan_source_value	No	VARCHAR(50)	The source code for the Person's health benefit plan as it appears in the source data.	payer_plan_period
283	plan_source_concept_id	No	INTEGER	A foreign key to a plan concept that refers to the plan code used in the source data.	payer_plan_period
284	sponsor_concept_id	No	INTEGER	A foreign key that refers to a concept identifier that represents the sponsor in the Standardized Vocabularies.	payer_plan_period
285	sponsor_source_value	No	VARCHAR(50)	The source code for the Person's sponsor of the health plan as it appears in the source data.	payer_plan_period
286	sponsor_source_concept_id	No	INTEGER	A foreign key to a sponsor concept that refers to the sponsor code used in the source data.	payer_plan_period
287	family_source_value	No	VARCHAR(50)	The source code for the Person's family as it appears in the source data.	payer_plan_period
288	stop_reason_concept_id	No	INTEGER	A foreign key that refers to a standard termination reason that represents the reason for the termination in the Standardized Vocabularies.	payer_plan_period
289	stop_reason_source_value	No	VARCHAR(50)	The reason for stop-coverage as it appears in the source data.	payer_plan_period
290	stop_reason_source_concept_id	No	INTEGER	A foreign key to a stop-coverage concept that refers to the code used in the source.	payer_plan_period
291	care_site_id	Yes	INTEGER	A unique identifier for each Care Site.	care_site
292	care_site_name	No	VARCHAR(255)	The verbatim description or name of the Care Site as in data source	care_site
293	place_of_service_concept_id	No	INTEGER	A foreign key that refers to a Place of Service Concept ID in the Standardized Vocabularies.	care_site
294	location_id	No	INTEGER	A foreign key to the geographic Location in the LOCATION table, where the detailed address information is stored.	care_site
295	care_site_source_value	No	VARCHAR(50)	The identifier for the Care Site in the source data, stored here for reference.	care_site
296	place_of_service_source_value	No	VARCHAR(50)	The source code for the Place of Service as it appears in the source data, stored here for reference.	care_site
297	location_id	Yes	INTEGER	A unique identifier for each geographic location.	location
298	address_1	No	VARCHAR(50)	The address field 1, typically used for the street address, as it appears in the source data.	location
299	address_2	No	VARCHAR(50)	The address field 2, typically used for additional detail such as buildings, suites, floors, as it appears in the source data.	location
300	city	No	VARCHAR(50)	The city field as it appears in the source data.	location
301	state	No	VARCHAR(2)	The state field as it appears in the source data.	location
302	zip	No	VARCHAR(9)	The zip or postal code.	location
303	county	No	VARCHAR(20)	The county.	location
304	location_source_value	No	VARCHAR(50)	The verbatim information that is used to uniquely identify the location as it appears in the source data.	location
305	provider_id	Yes	INTEGER	A unique identifier for each Provider.	provider
306	provider_name	No	VARCHAR(255)	A description of the Provider.	provider
307	npi	No	VARCHAR(20)	The National Provider Identifier (NPI) of the provider.	provider
308	dea	No	VARCHAR(20)	The Drug Enforcement Administration (DEA) number of the provider.	provider
309	specialty_concept_id	No	INTEGER	A foreign key to a Standard Specialty Concept ID in the Standardized Vocabularies.	provider
310	care_site_id	No	INTEGER	A foreign key to the main Care Site where the provider is practicing.	provider
311	year_of_birth	No	INTEGER	The year of birth of the Provider.	provider
312	gender_concept_id	No	INTEGER	The gender of the Provider.	provider
313	provider_source_value	No	VARCHAR(50)	The identifier used for the Provider in the source data, stored here for reference.	provider
314	specialty_source_value	No	VARCHAR(50)	The source code for the Provider specialty as it appears in the source data, stored here for reference.	provider
315	specialty_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	provider
316	gender_source_value	No	VARCHAR(50)	The gender code for the Provider as it appears in the source data, stored here for reference.	provider
317	gender_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	provider
318	cdm_source_name	Yes	VARCHAR(255)	The full name of the source	cdm_source
319	cdm_source_abbreviation	No	VARCHAR(25)	An abbreviation of the name	cdm_source
320	cdm_holder	No	VARCHAR(255)	The name of the organization responsible for the development of the CDM instance	cdm_source
321	source_description	No	CLOB	A description of the source data origin and purpose for collection. The description may contain a summary of the period of time that is expected to be covered by this dataset.	cdm_source
322	source_documentation_reference	No	VARCHAR(255)	URL or other external reference to location of source documentation	cdm_source
323	cdm_etl _reference	No	VARCHAR(255)	URL or other external reference to location of ETL specification documentation and ETL source code	cdm_source
324	source_release_date	No	DATE	The date for which the source data are most current, such as the last day of data capture	cdm_source
325	cdm_release_date	No	DATE	The date when the CDM was instantiated	cdm_source
326	cdm_version	No	VARCHAR(10)	The version of CDM used	cdm_source
327	vocabulary_version	No	VARCHAR(20)	The version of the vocabulary used	cdm_source
328	metadata_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Metadata Concept identifier in the Standardized Vocabularies.	metadata
329	metadata_type_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Type Concept identifier in the Standardized Vocabularies.	metadata
330	name	Yes	VARCHAR(250)	The name of the Concept stored in metadata_concept_id or a description of the data being stored.	metadata
331	value_as_string	No	NVARCHAR	The metadata value stored as a string.	metadata
332	value_as_concept_id	No	INTEGER	A foreign key to a metadata value stored as a Concept ID.	metadata
333	metadata date	No	DATE	The date associated with the metadata	metadata
334	metadata_datetime	No	DATETIME	The date and time associated with the metadata	metadata
335	attribute_definition_id	Yes	INTEGER	A unique identifier for each Attribute.	attribute_definition
336	attribute_name	Yes	VARCHAR(255)	A short description of the Attribute.	attribute_definition
337	attribute_description	No	VARCHAR(MAX)	A complete description of the Attribute definition	attribute_definition
338	attribute_type_concept_id	Yes	INTEGER	Type defining what kind of Attribute Definition the record represents and how the syntax may be executed	attribute_definition
339	attribute_syntax	No	VARCHAR(MAX)	Syntax or code to operationalize the Attribute definition	attribute_definition
340	cohort_definition_id	Yes	INTEGER	A unique identifier for each Cohort.	cohort_definition
341	cohort_definition_name	Yes	VARCHAR(255)	A short description of the Cohort.	cohort_definition
342	cohort_definition_description	No	VARCHAR(MAX)	A complete description of the Cohort definition	cohort_definition
343	definition_type_concept_id	Yes	INTEGER	Type defining what kind of Cohort Definition the record represents and how the syntax may be executed	cohort_definition
344	cohort_definition_syntax	No	VARCHAR(MAX)	Syntax or code to operationalize the Cohort definition	cohort_definition
345	subject_concept_id	Yes	INTEGER	A foreign key to the Concept to which defines the domain of subjects that are members of the cohort (e.g., Person, Provider, Visit).	cohort_definition
346	cohort_instantiation_date	No	DATE	A date to indicate when the Cohort was instantiated in the COHORT table	cohort_definition
347	concept_id	Yes	INTEGER	A unique identifier for each Concept across all domains.	concept
348	concept_name	Yes	VARCHAR(255)	An unambiguous, meaningful and descriptive name for the Concept.	concept
349	domain_id	Yes	VARCHAR(20)	A foreign key to the [DOMAIN](https://github.com/OHDSI/CommonDataModel/wiki/DOMAIN) table the Concept belongs to.	concept
350	vocabulary_id	Yes	VARCHAR(20)	A foreign key to the [VOCABULARY](https://github.com/OHDSI/CommonDataModel/wiki/VOCABULARY) table indicating from which source the Concept has been adapted.	concept
351	concept_class_id	Yes	VARCHAR(20)	The attribute or concept class of the Concept. Examples are 'Clinical Drug', 'Ingredient', 'Clinical Finding' etc.	concept
352	standard_concept	No	VARCHAR(1)	This flag determines where a Concept is a Standard Concept, i.e. is used in the data, a Classification Concept, or a non-standard Source Concept. The allowables values are 'S' (Standard Concept) and 'C' (Classification Concept), otherwise the content is NULL.	concept
353	concept_code	Yes	VARCHAR(50)	The concept code represents the identifier of the Concept in the source vocabulary, such as SNOMED-CT concept IDs, RxNorm RXCUIs etc. Note that concept codes are not unique across vocabularies.	concept
354	valid_start_date	Yes	DATE	The date when the Concept was first recorded. The default value is 1-Jan-1970, meaning, the Concept has no (known) date of inception.	concept
355	valid_end_date	Yes	DATE	The date when the Concept became invalid because it was deleted or superseded (updated) by a new concept. The default value is 31-Dec-2099, meaning, the Concept is valid until it becomes deprecated.	concept
356	invalid_reason	No	VARCHAR(1)	Reason the Concept was invalidated. Possible values are D (deleted), U (replaced with an update) or NULL when valid_end_date has the default value.	concept
357	ancestor_concept_id	Yes	INTEGER	A foreign key to the concept in the concept table for the higher-level concept that forms the ancestor in the relationship.	concept_ancestor
358	descendant_concept_id	Yes	INTEGER	A foreign key to the concept in the concept table for the lower-level concept that forms the descendant in the relationship.	concept_ancestor
359	min_levels_of_separation	Yes	INTEGER	The minimum separation in number of levels of hierarchy between ancestor and descendant concepts. This is an attribute that is used to simplify hierarchic analysis.	concept_ancestor
360	max_levels_of_separation	Yes	INTEGER	The maximum separation in number of levels of hierarchy between ancestor and descendant concepts. This is an attribute that is used to simplify hierarchic analysis.	concept_ancestor
361	concept_class_id	Yes	VARCHAR(20)	A unique key for each class.	concept_class
362	concept_class_name	Yes	VARCHAR(255)	The name describing the Concept Class, e.g. "Clinical Finding", "Ingredient", etc.	concept_class
363	concept_class_concept_id	Yes	INTEGER	A foreign key that refers to an identifier in the [CONCEPT](https://github.com/OHDSI/CommonDataModel/wiki/CONCEPT) table for the unique Concept Class the record belongs to.	concept_class
364	concept_id_1	Yes	INTEGER	A foreign key to a Concept in the [CONCEPT](https://github.com/OHDSI/CommonDataModel/wiki/CONCEPT) table associated with the relationship. Relationships are directional, and this field represents the source concept designation.	concept_relationship
365	concept_id_2	Yes	INTEGER	A foreign key to a Concept in the [CONCEPT](https://github.com/OHDSI/CommonDataModel/wiki/CONCEPT) table associated with the relationship. Relationships are directional, and this field represents the destination concept designation.	concept_relationship
366	relationship_id	Yes	VARCHAR(20)	A unique identifier to the type or nature of the Relationship as defined in the [RELATIONSHIP](https://github.com/OHDSI/CommonDataModel/wiki/RELATIONSHIP) table.	concept_relationship
367	valid_start_date	Yes	DATE	The date when the instance of the Concept Relationship is first recorded.	concept_relationship
368	valid_end_date	Yes	DATE	The date when the Concept Relationship became invalid because it was deleted or superseded (updated) by a new relationship. Default value is 31-Dec-2099.	concept_relationship
369	invalid_reason	No	VARCHAR(1)	Reason the relationship was invalidated. Possible values are 'D' (deleted), 'U' (replaced with an update) or NULL when valid_end_date has the default value.	concept_relationship
370	concept_id	Yes	INTEGER	A foreign key to the Concept in the CONCEPT table.	concept_synonym
371	concept_synonym_name	Yes	VARCHAR(1000)	The alternative name for the Concept.	concept_synonym
372	language_concept_id	Yes	INTEGER	A foreign key to a Concept representing the language.	concept_synonym
373	domain_id	Yes	VARCHAR(20)	A unique key for each domain.	domain
374	domain_name	Yes	VARCHAR(255)	The name describing the Domain, e.g. "Condition", "Procedure", "Measurement" etc.	domain
375	domain_concept_id	Yes	INTEGER	A foreign key that refers to an identifier in the [CONCEPT](https://github.com/OHDSI/CommonDataModel/wiki/CONCEPT) table for the unique Domain Concept the Domain record belongs to.	domain
376	drug_concept_id	Yes	INTEGER	A foreign key to the Concept in the CONCEPT table representing the identifier for Branded Drug or Clinical Drug Concept.	drug_strength
377	ingredient_concept_id	Yes	INTEGER	A foreign key to the Concept in the CONCEPT table, representing the identifier for drug Ingredient Concept contained within the drug product.	drug_strength
378	amount_value	No	FLOAT	The numeric value associated with the amount of active ingredient contained within the product.	drug_strength
379	amount_unit_concept_id	No	INTEGER	A foreign key to the Concept in the CONCEPT table representing the identifier for the Unit for the absolute amount of active ingredient.	drug_strength
380	numerator_value	No	FLOAT	The numeric value associated with the concentration of the active ingredient contained in the product	drug_strength
381	numerator_unit_concept_id	No	INTEGER	A foreign key to the Concept in the CONCEPT table representing the identifier for the numerator Unit for the concentration of active ingredient.	drug_strength
382	denominator_value	No	FLOAT	The amount of total liquid (or other divisible product, such as ointment, gel, spray, etc.).	drug_strength
383	denominator_unit_concept_id	No	INTEGER	A foreign key to the Concept in the CONCEPT table representing the identifier for the denominator Unit for the concentration of active ingredient.	drug_strength
384	box_size	No	INTEGER	The number of units of Clinical of Branded Drug, or Quantified Clinical or Branded Drug contained in a box as dispensed to the patient	drug_strength
385	valid_start_date	Yes	DATE	The date when the Concept was first recorded. The default value is 1-Jan-1970.	drug_strength
386	valid_end_date	Yes	DATE	The date when the concept became invalid because it was deleted or superseded (updated) by a new Concept. The default value is 31-Dec-2099.	drug_strength
387	invalid_reason	No	VARCHAR(1)	Reason the concept was invalidated. Possible values are 'D' (deleted), 'U' (replaced with an update) or NULL when valid_end_date has the default value.	drug_strength
388	relationship_id	Yes	VARCHAR(20)	The type of relationship captured by the relationship record.	relationship
389	relationship_name	Yes	VARCHAR(255)	The text that describes the relationship type.	relationship
390	is_hierarchical	Yes	VARCHAR(1)	Defines whether a relationship defines concepts into classes or hierarchies. Values are 1 for hierarchical relationship or 0 if not.	relationship
391	defines_ancestry	Yes	VARCHAR(1)	Defines whether a hierarchical relationship contributes to the concept_ancestor table. These are subsets of the hierarchical relationships. Valid values are 1 or 0.	relationship
392	reverse_relationship_id	Yes	VARCHAR(20)	The identifier for the relationship used to define the reverse relationship between two concepts.	relationship
393	relationship_concept_id	Yes	INTEGER	A foreign key that refers to an identifier in the CONCEPT table for the unique relationship concept.	relationship
394	source_code	Yes	VARCHAR(50)	The source code being translated into a Standard Concept.	source_to_concept_map
395	source_concept_id	Yes	INTEGER	A foreign key to the Source Concept that is being translated into a Standard Concept.	source_to_concept_map
396	source_vocabulary_id	Yes	VARCHAR(20)	A foreign key to the VOCABULARY table defining the vocabulary of the source code that is being translated to a Standard Concept.	source_to_concept_map
397	source_code_description	No	VARCHAR(255)	An optional description for the source code. This is included as a convenience to compare the description of the source code to the name of the concept.	source_to_concept_map
398	target_concept_id	Yes	INTEGER	A foreign key to the target Concept to which the source code is being mapped.	source_to_concept_map
399	target_vocabulary_id	Yes	VARCHAR(20)	A foreign key to the VOCABULARY table defining the vocabulary of the target Concept.	source_to_concept_map
400	valid_start_date	Yes	DATE	The date when the mapping instance was first recorded.	source_to_concept_map
401	valid_end_date	Yes	DATE	The date when the mapping instance became invalid because it was deleted or superseded (updated) by a new relationship. Default value is 31-Dec-2099.	source_to_concept_map
402	invalid_reason	No	VARCHAR(1)	Reason the mapping instance was invalidated. Possible values are D (deleted), U (replaced with an update) or NULL when valid_end_date has the default value.	source_to_concept_map
403	vocabulary_id	Yes	VARCHAR(20)	A unique identifier for each Vocabulary, such as ICD9CM, SNOMED, Visit.	vocabulary
404	vocabulary_name	Yes	VARCHAR(255)	The name describing the vocabulary, for example "International Classification of Diseases, Ninth Revision, Clinical Modification, Volume 1 and 2 (NCHS)" etc.	vocabulary
405	vocabulary_reference	Yes	VARCHAR(255)	External reference to documentation or available download of the about the vocabulary.	vocabulary
406	vocabulary_version	Yes	VARCHAR(255)	Version of the Vocabulary as indicated in the source.	vocabulary
407	vocabulary_concept_id	Yes	INTEGER	A foreign key that refers to a standard concept identifier in the CONCEPT table for the Vocabulary the VOCABULARY record belongs to.	vocabulary