OMOP/Documentation/CommonDataModel_Csv_Files/OMOP_CDM_v5_2.csv

1	schema	table	field	required	type	description	table
2	cdm	condition_occurrence	condition_occurrence_id	Yes	INTEGER	A unique identifier for each Condition Occurrence event.	condition_occurrence
3	cdm	condition_occurrence	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	cdm	condition_occurrence	condition_concept_id	Yes	INTEGER	A foreign key that refers to a Standard Condition Concept identifier in the Standardized Vocabularies.	condition_occurrence
5	cdm	condition_occurrence	condition_start_date	Yes	DATE	The date when the instance of the Condition is recorded.	condition_occurrence
6	cdm	condition_occurrence	condition_start_datetime	No	DATETIME	The date and time when the instance of the Condition is recorded.	condition_occurrence
7	cdm	condition_occurrence	condition_end_date	No	DATE	The date when the instance of the Condition is considered to have ended.	condition_occurrence
8	cdm	condition_occurrence	condition_end_datetime	No	DATE	The date when the instance of the Condition is considered to have ended.	condition_occurrence
9	cdm	condition_occurrence	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	cdm	condition_occurrence	stop_reason	No	VARCHAR(20)	The reason that the condition was no longer present, as indicated in the source data.	condition_occurrence
11	cdm	condition_occurrence	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	cdm	condition_occurrence	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	cdm	condition_occurrence	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
14	cdm	condition_occurrence	condition_source_concept_id	No	INTEGER	A foreign key to a Condition Concept that refers to the code used in the source.	condition_occurrence
15	cdm	condition_occurrence	condition_status_source_value	No	VARCHAR(50)	The source code for the condition status as it appears in the source data.	condition_occurrence
16	cdm	condition_occurrence	condition_status_concept_id	No	INTEGER	A foreign key to the predefined Concept in the Standard Vocabulary reflecting the condition status	condition_occurrence
17	cdm	death	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
18	cdm	death	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
19	cdm	death	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
20	cdm	death	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
21	cdm	death	cause_concept_id	No	INTEGER	A foreign key referring to a standard concept identifier in the Standardized Vocabularies for conditions.	death
22	cdm	death	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
23	cdm	death	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
24	cdm	device_exposure	device_exposure_id	Yes	INTEGER	A system-generated unique identifier for each Device Exposure.	device_exposure
25	cdm	device_exposure	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
26	cdm	device_exposure	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
27	cdm	device_exposure	device_exposure_start_date	Yes	DATE	The date the Device or supply was applied or used.	device_exposure
28	cdm	device_exposure	device_exposure_start_datetime	No	DATETIME	The date and time the Device or supply was applied or used.	device_exposure
29	cdm	device_exposure	device_exposure_end_date	No	DATE	The date the Device or supply was removed from use.	device_exposure
30	cdm	device_exposure	device_exposure_end_datetime	No	DATETIME	The date and time the Device or supply was removed from use.	device_exposure
31	cdm	device_exposure	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
32	cdm	device_exposure	unique_device_id	No	VARCHAR(50)	A UDI or equivalent identifying the instance of the Device used in the Person.	device_exposure
33	cdm	device_exposure	quantity	No	INTEGER	The number of individual Devices used for the exposure.	device_exposure
34	cdm	device_exposure	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who initiated of administered the Device.	device_exposure
35	cdm	device_exposure	visit_occurrence_id	No	INTEGER	A foreign key to the visit in the VISIT_OCCURRENCE table during which the device was used.	device_exposure
36	cdm	device_exposure	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
37	cdm	device_exposure	device_source_concept_id	No	INTEGER	A foreign key to a Device Concept that refers to the code used in the source.	device_exposure
38	cdm	drug_exposure	drug_exposure_id	Yes	INTEGER	A system-generated unique identifier for each Drug utilization event.	drug_exposure
39	cdm	drug_exposure	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
40	cdm	drug_exposure	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
41	cdm	drug_exposure	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
42	cdm	drug_exposure	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
43	cdm	drug_exposure	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
44	cdm	drug_exposure	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
45	cdm	drug_exposure	verbatim_end_date	No	DATE	The known end date of a drug_exposure as provided by the source	drug_exposure
46	cdm	drug_exposure	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
47	cdm	drug_exposure	stop_reason	No	VARCHAR(20)	The reason the Drug was stopped. Reasons include regimen completed, changed, removed, etc.	drug_exposure
48	cdm	drug_exposure	refills	No	INTEGER	The number of refills after the initial prescription. The initial prescription is not counted, values start with 0.	drug_exposure
49	cdm	drug_exposure	quantity	No	FLOAT	The quantity of drug as recorded in the original prescription or dispensing record.	drug_exposure
50	cdm	drug_exposure	days_supply	No	INTEGER	The number of days of supply of the medication as recorded in the original prescription or dispensing record.	drug_exposure
51	cdm	drug_exposure	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
52	cdm	drug_exposure	route_concept_id	No	INTEGER	A foreign key to a predefined concept in the Standardized Vocabularies reflecting the route of administration.	drug_exposure
53	cdm	drug_exposure	lot_number	No	VARCHAR(50)	An identifier assigned to a particular quantity or lot of Drug product from the manufacturer.	drug_exposure
54	cdm	drug_exposure	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who initiated (prescribed or administered) the Drug Exposure.	drug_exposure
55	cdm	drug_exposure	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
56	cdm	drug_exposure	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
57	cdm	drug_exposure	drug_source_concept_id	No	INTEGER	A foreign key to a Drug Concept that refers to the code used in the source.	drug_exposure
58	cdm	drug_exposure	route_source_value	No	VARCHAR(50)	The information about the route of administration as detailed in the source.	drug_exposure
59	cdm	drug_exposure	dose_unit_source_value	No	VARCHAR(50)	The information about the dose unit as detailed in the source.	drug_exposure
60	cdm	fact_relationship	domain_concept_id_1	Yes	INTEGER	The concept representing the domain of fact one, from which the corresponding table can be inferred.	fact_relationship
61	cdm	fact_relationship	fact_id_1	Yes	INTEGER	The unique identifier in the table corresponding to the domain of fact one.	fact_relationship
62	cdm	fact_relationship	domain_concept_id_2	Yes	INTEGER	The concept representing the domain of fact two, from which the corresponding table can be inferred.	fact_relationship
63	cdm	fact_relationship	fact_id_2	Yes	INTEGER	The unique identifier in the table corresponding to the domain of fact two.	fact_relationship
64	cdm	fact_relationship	relationship_concept_id	Yes	INTEGER	A foreign key to a Standard Concept ID of relationship in the Standardized Vocabularies.	fact_relationship
65	cdm	measurement	measurement_id	Yes	INTEGER	A unique identifier for each Measurement.	measurement
66	cdm	measurement	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
67	cdm	measurement	measurement_concept_id	Yes	INTEGER	A foreign key to the standard measurement concept identifier in the Standardized Vocabularies.	measurement
68	cdm	measurement	measurement_date	Yes	DATE	The date of the Measurement.	measurement
69	cdm	measurement	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
70	cdm	measurement	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
71	cdm	measurement	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
72	cdm	measurement	value_as_number	No	FLOAT	A Measurement result where the result is expressed as a numeric value.	measurement
73	cdm	measurement	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
74	cdm	measurement	unit_concept_id	No	INTEGER	A foreign key to a Standard Concept ID of Measurement Units in the Standardized Vocabularies.	measurement
75	cdm	measurement	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
76	cdm	measurement	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
77	cdm	measurement	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who was responsible for initiating or obtaining the measurement.	measurement
78	cdm	measurement	visit_occurrence_id	No	INTEGER	A foreign key to the Visit in the VISIT_OCCURRENCE table during which the Measurement was recorded.	measurement
79	cdm	measurement	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
80	cdm	measurement	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
81	cdm	measurement	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
82	cdm	measurement	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
83	cdm	note	note_id	Yes	INTEGER	A unique identifier for each note.	note
84	cdm	note	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
85	cdm	note	note_date	Yes	DATE	The date the note was recorded.	note
86	cdm	note	note_datetime	No	DATETIME	The date and time the note was recorded.	note
87	cdm	note	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
88	cdm	note	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
89	cdm	note	note_title	No	VARCHAR(250)	The title of the Note as it appears in the source.	note
90	cdm	note	note_text	Yes	VARCHAR(MAX)	The content of the Note.	note
91	cdm	note	encoding_concept_id	Yes	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the note character encoding type	note
92	cdm	note	language_concept_id	Yes	INTEGER	A foreign key to the predefined Concept in the Standardized Vocabularies reflecting the language of the note	note
93	cdm	note	provider_id	No	INTEGER	A foreign key to the Provider in the PROVIDER table who took the Note.	note
94	cdm	note	note_source_value	No	VARCHAR(50)	The source value associated with the origin of the Note	note
95	cdm	note	visit_occurrence_id	No	INTEGER	A foreign key to the Visit in the VISIT_OCCURRENCE table when the Note was taken.	note
96	cdm	note_nlp	note_nlp_id	Yes	INTEGER	A unique identifier for each term extracted from a note.	note_nlp
97	cdm	note_nlp	note_id	Yes	INTEGER	A foreign key to the Note table note the term was extracted from.	note_nlp
98	cdm	note_nlp	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
99	cdm	note_nlp	snippet	No	VARCHAR(250)	A small window of text surrounding the term.	note_nlp
100	cdm	note_nlp	offset	No	VARCHAR(50)	Character offset of the extracted term in the input note.	note_nlp
101	cdm	note_nlp	lexical_variant	Yes	VARCHAR(250)	Raw text extracted from the NLP tool.	note_nlp
102	cdm	note_nlp	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
103	cdm	note_nlp	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
104	cdm	note_nlp	nlp_system	No	VARCHAR(250)	Name and version of the NLP system that extracted the term.Useful for data provenance.	note_nlp
105	cdm	note_nlp	nlp_date	Yes	DATE	The date of the note processing.Useful for data provenance.	note_nlp
106	cdm	note_nlp	nlp_date_time	No	DATETIME	The date and time of the note processing. Useful for data provenance.	note_nlp
107	cdm	note_nlp	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
108	cdm	note_nlp	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
109	cdm	note_nlp	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
110	cdm	observation	observation_id	Yes	INTEGER	A unique identifier for each observation.	observation
111	cdm	observation	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
112	cdm	observation	observation_concept_id	Yes	INTEGER	A foreign key to the standard observation concept identifier in the Standardized Vocabularies.	observation
113	cdm	observation	observation_date	Yes	DATE	The date of the observation.	observation
114	cdm	observation	observation_datetime	No	DATETIME	The date and time of the observation.	observation
115	cdm	observation	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
116	cdm	observation	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
117	cdm	observation	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
118	cdm	observation	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
119	cdm	observation	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
120	cdm	observation	unit_concept_id	No	INTEGER	A foreign key to a Standard Concept ID of measurement units in the Standardized Vocabularies.	observation
121	cdm	observation	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who was responsible for making the observation.	observation
122	cdm	observation	visit_occurrence_id	No	INTEGER	A foreign key to the visit in the VISIT_OCCURRENCE table during which the observation was recorded.	observation
123	cdm	observation	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
124	cdm	observation	observation_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	observation
125	cdm	observation	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
126	cdm	observation	qualifier_source_value	No	VARCHAR(50)	The source value associated with a qualifier to characterize the observation	observation
127	cdm	observation_period	observation_period_id	Yes	INTEGER	A unique identifier for each observation period.	observation_period
128	cdm	observation_period	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
129	cdm	observation_period	observation_period_start_date	Yes	DATE	The start date of the observation period for which data are available from the data source.	observation_period
130	cdm	observation_period	observation_period_end_date	Yes	DATE	The end date of the observation period for which data are available from the data source.	observation_period
131	cdm	observation_period	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
132	cdm	person	person_id	Yes	INTEGER	A unique identifier for each person.	person
133	cdm	person	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
134	cdm	person	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
135	cdm	person	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
136	cdm	person	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
137	cdm	person	birth_datetime	No	DATETIME	The date and time of birth of the person.	person
138	cdm	person	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
139	cdm	person	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
140	cdm	person	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
141	cdm	person	provider_id	No	INTEGER	A foreign key to the primary care provider the person is seeing in the provider table.	person
142	cdm	person	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
143	cdm	person	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
144	cdm	person	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
145	cdm	person	gender_source_concept_id	No	INTEGER	A foreign key to the gender concept that refers to the code used in the source.	person
146	cdm	person	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
147	cdm	person	race_source_concept_id	No	INTEGER	A foreign key to the race concept that refers to the code used in the source.	person
148	cdm	person	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
149	cdm	person	ethnicity_source_concept_id	No	INTEGER	A foreign key to the ethnicity concept that refers to the code used in the source.	person
150	cdm	procedure_occurrence	procedure_occurrence_id	Yes	INTEGER	A system-generated unique identifier for each Procedure Occurrence.	procedure_occurrence
151	cdm	procedure_occurrence	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
152	cdm	procedure_occurrence	procedure_concept_id	Yes	INTEGER	A foreign key that refers to a standard procedure Concept identifier in the Standardized Vocabularies.	procedure_occurrence
153	cdm	procedure_occurrence	procedure_date	Yes	DATE	The date on which the Procedure was performed.	procedure_occurrence
154	cdm	procedure_occurrence	procedure_datetime	No	DATETIME	The date and time on which the Procedure was performed.	procedure_occurrence
155	cdm	procedure_occurrence	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
156	cdm	procedure_occurrence	modifier_concept_id	No	INTEGER	A foreign key to a Standard Concept identifier for a modifier to the Procedure (e.g. bilateral)	procedure_occurrence
157	cdm	procedure_occurrence	quantity	No	INTEGER	The quantity of procedures ordered or administered.	procedure_occurrence
158	cdm	procedure_occurrence	provider_id	No	INTEGER	A foreign key to the provider in the PROVIDER table who was responsible for carrying out the procedure.	procedure_occurrence
159	cdm	procedure_occurrence	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
160	cdm	procedure_occurrence	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
161	cdm	procedure_occurrence	procedure_source_concept_id	No	INTEGER	A foreign key to a Procedure Concept that refers to the code used in the source.	procedure_occurrence
162	cdm	procedure_occurrence	qualifier_source_value	No	VARCHAR(50)	The source code for the qualifier as it appears in the source data.
163	cdm	specimen	specimen_id	Yes	INTEGER	A unique identifier for each specimen.	specimen
164	cdm	specimen	person_id	Yes	INTEGER	A foreign key identifier to the Person for whom the Specimen is recorded.	specimen
165	cdm	specimen	specimen_concept_id	Yes	INTEGER	A foreign key referring to a Standard Concept identifier in the Standardized Vocabularies for the Specimen.	specimen
166	cdm	specimen	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
167	cdm	specimen	specimen_date	Yes	DATE	The date the specimen was obtained from the Person.	specimen
168	cdm	specimen	specimen_datetime	No	DATETIME	The date and time on the date when the Specimen was obtained from the person.	specimen
169	cdm	specimen	quantity	No	FLOAT	The amount of specimen collection from the person during the sampling procedure.	specimen
170	cdm	specimen	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
171	cdm	specimen	anatomic_site_concept_id	No	INTEGER	A foreign key to a Standard Concept identifier for the anatomic location of specimen collection.	specimen
172	cdm	specimen	disease_status_concept_id	No	INTEGER	A foreign key to a Standard Concept identifier for the Disease Status of specimen collection.	specimen
173	cdm	specimen	specimen_source_id	No	VARCHAR(50)	The Specimen identifier as it appears in the source data.	specimen
174	cdm	specimen	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
175	cdm	specimen	unit_source_value	No	VARCHAR(50)	The information about the Unit as detailed in the source.	specimen
176	cdm	specimen	anatomic_site_source_value	No	VARCHAR(50)	The information about the anatomic site as detailed in the source.	specimen
177	cdm	specimen	disease_status_source_value	No	VARCHAR(50)	The information about the disease status as detailed in the source.	specimen
178	cdm	visit_occurrence	visit_occurrence_id	Yes	INTEGER	A unique identifier for each Person's visit or encounter at a healthcare provider.	visit_occurrence
179	cdm	visit_occurrence	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
180	cdm	visit_occurrence	visit_concept_id	Yes	INTEGER	A foreign key that refers to a visit Concept identifier in the Standardized Vocabularies.	visit_occurrence
181	cdm	visit_occurrence	visit_start_date	Yes	DATE	The start date of the visit.	visit_occurrence
182	cdm	visit_occurrence	visit_start_datetime	No	DATETIME	The date and time of the visit started.	visit_occurrence
183	cdm	visit_occurrence	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
184	cdm	visit_occurrence	visit_end_datetime	No	DATETIME	The date and time of the visit end.	visit_occurrence
185	cdm	visit_occurrence	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
186	cdm	visit_occurrence	provider_id	No	INTEGER	A foreign key to the provider in the provider table who was associated with the visit.	visit_occurrence
187	cdm	visit_occurrence	care_site_id	No	INTEGER	A foreign key to the care site in the care site table that was visited.	visit_occurrence
188	cdm	visit_occurrence	visit_source_value	No	VARCHAR(50)	The source code for the visit as it appears in the source data.	visit_occurrence
189	cdm	visit_occurrence	visit_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	visit_occurrence
190	cdm	visit_occurrence	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
191	cdm	visit_occurrence	admitting_source_value	varchar(50)	NO	The source code for the admitting source as it appears in the source data.	visit_occurrence
192	cdm	visit_occurrence	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
193	cdm	visit_occurrence	discharge_to_source_value	varchar(50)	NO	The source code for the discharge disposition as it appears in the source data.	visit_occurrence
194	cdm	visit_occurrence	preceding_visit_occurrence_id	integer	NO	A foreign key to the VISIT_OCCURRENCE table of the visit immediately preceding this visit	visit_occurrence
195	results	cohort	cohort_definition_id	Yes	INTEGER	A foreign key to a record in the COHORT_DEFINITION table containing relevant Cohort Definition information.	cohort
196	results	cohort	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
197	results	cohort	cohort_start_date	Yes	DATE	The date when the Cohort Definition criteria for the Person, Provider or Visit first match.	cohort
198	results	cohort	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
199	results	cohort_attribute	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
200	results	cohort_attribute	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
201	results	cohort_attribute	cohort_start_date	Yes	DATE	The date when the Cohort Definition criteria for the Person, Provider or Visit first match.	cohort_attribute
202	results	cohort_attribute	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
203	results	cohort_attribute	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
204	results	cohort_attribute	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
205	results	cohort_attribute	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
206	cdm	condition_era	condition_era_id	Yes	INTEGER	A unique identifier for each Condition Era.	condition_era
207	cdm	condition_era	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
208	cdm	condition_era	condition_concept_id	Yes	INTEGER	A foreign key that refers to a standard Condition Concept identifier in the Standardized Vocabularies.	condition_era
209	cdm	condition_era	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
210	cdm	condition_era	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
211	cdm	condition_era	condition_occurrence_count	No	INTEGER	The number of individual Condition Occurrences used to construct the condition era.	condition_era
212	cdm	dose_era	dose_era_id	Yes	INTEGER	A unique identifier for each Dose Era.	dose_era
213	cdm	dose_era	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
214	cdm	dose_era	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
215	cdm	dose_era	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
216	cdm	dose_era	dose_value	Yes	FLOAT	The numeric value of the dose.	dose_era
217	cdm	dose_era	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
218	cdm	dose_era	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
219	cdm	drug_era	drug_era_id	Yes	INTEGER	A unique identifier for each Drug Era.	drug_era
220	cdm	drug_era	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
221	cdm	drug_era	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
222	cdm	drug_era	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
223	cdm	drug_era	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
224	cdm	drug_era	drug_exposure_count	No	INTEGER	The number of individual Drug Exposure occurrences used to construct the Drug Era.	drug_era
225	cdm	drug_era	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
226	cdm	cost	cost_id	Yes	INTEGER	A unique identifier for each COST record.	cost
227	cdm	cost	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
228	cdm	cost	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
229	cdm	cost	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
230	cdm	cost	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
231	cdm	cost	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
232	cdm	cost	total_cost	No	FLOAT	The cost incurred by the provider of goods or services.	cost
233	cdm	cost	total_paid	No	FLOAT	The total amount actually paid from all payers for goods or services of the provider.	cost
234	cdm	cost	paid_by_payer	No	FLOAT	The amount paid by the Payer for the goods or services.	cost
235	cdm	cost	paid_by_patient	No	FLOAT	The total amount paid by the Person as a share of the expenses.	cost
236	cdm	cost	paid_patient_copay	No	FLOAT	The amount paid by the Person as a fixed contribution to the expenses.	cost
237	cdm	cost	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
238	cdm	cost	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
239	cdm	cost	paid_by_primary	No	FLOAT	The amount paid by a primary Payer through the coordination of benefits.	cost
240	cdm	cost	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
241	cdm	cost	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
242	cdm	cost	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
243	cdm	cost	amount_allowed	No	FLOAT	The contracted amount agreed between the payer and provider.	cost
244	cdm	cost	revenue_code_concept_id	No	INTEGER	A foreign key referring to a Standard Concept ID in the Standardized Vocabularies for Revenue codes.	cost
245	cdm	cost	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
246	cdm	cost	drg_concept_id	No	INTEGER	A foreign key to the predefined concept in the DRG Vocabulary reflecting the DRG for a visit.	cost
247	cdm	cost	drg_source_value	No	VARCHAR(3)	The 3-digit DRG source code as it appears in the source data.	cost
248	cdm	payer_plan_period	payer_plan_period_id	Yes	INTEGER	A identifier for each unique combination of payer, plan, family code and time span.	payer_plan_period
249	cdm	payer_plan_period	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
250	cdm	payer_plan_period	payer_plan_period_start_date	Yes	DATE	The start date of the payer plan period.	payer_plan_period
251	cdm	payer_plan_period	payer_plan_period_end_date	Yes	DATE	The end date of the payer plan period.	payer_plan_period
252	cdm	payer_plan_period	payer_source_value	No	VARCHAR(50)	The source code for the payer as it appears in the source data.
253	cdm	payer_plan_period	plan_source_value	No	VARCHAR(50)	The source code for the Person’s health benefit plan as it appears in the source data.
254	cdm	payer_plan_period	family_source_value	No	VARCHAR(50)	The source code for the Person’s family as it appears in the source data.
255	cdm	care_site	care_site_id	Yes	INTEGER	A unique identifier for each Care Site.	care_site
256	cdm	care_site	care_site_name	No	VARCHAR(255)	The verbatim description or name of the Care Site as in data source	care_site
257	cdm	care_site	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
258	cdm	care_site	location_id	No	INTEGER	A foreign key to the geographic Location in the LOCATION table, where the detailed address information is stored.	care_site
259	cdm	care_site	care_site_source_value	No	VARCHAR(50)	The identifier for the Care Site in the source data, stored here for reference.	care_site
260	cdm	care_site	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
261	cdm	location	location_id	Yes	INTEGER	A unique identifier for each geographic location.	location
262	cdm	location	address_1	No	VARCHAR(50)	The address field 1, typically used for the street address, as it appears in the source data.	location
263	cdm	location	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
264	cdm	location	city	No	VARCHAR(50)	The city field as it appears in the source data.	location
265	cdm	location	state	No	VARCHAR(2)	The state field as it appears in the source data.	location
266	cdm	location	zip	No	VARCHAR(9)	The zip or postal code.	location
267	cdm	location	county	No	VARCHAR(20)	The county.	location
268	cdm	location	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
269	cdm	provider	provider_id	Yes	INTEGER	A unique identifier for each Provider.	provider
270	cdm	provider	provider_name	No	VARCHAR(255)	A description of the Provider.	provider
271	cdm	provider	npi	No	VARCHAR(20)	The National Provider Identifier (NPI) of the provider.	provider
272	cdm	provider	dea	No	VARCHAR(20)	The Drug Enforcement Administration (DEA) number of the provider.	provider
273	cdm	provider	specialty_concept_id	No	INTEGER	A foreign key to a Standard Specialty Concept ID in the Standardized Vocabularies.	provider
274	cdm	provider	care_site_id	No	INTEGER	A foreign key to the main Care Site where the provider is practicing.	provider
275	cdm	provider	year_of_birth	No	INTEGER	The year of birth of the Provider.	provider
276	cdm	provider	gender_concept_id	No	INTEGER	The gender of the Provider.	provider
277	cdm	provider	provider_source_value	No	VARCHAR(50)	The identifier used for the Provider in the source data, stored here for reference.	provider
278	cdm	provider	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
279	cdm	provider	specialty_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	provider
280	cdm	provider	gender_source_value	No	VARCHAR(50)	The gender code for the Provider as it appears in the source data, stored here for reference.	provider
281	cdm	provider	gender_source_concept_id	No	INTEGER	A foreign key to a Concept that refers to the code used in the source.	provider
282	cdm	cdm_source	cdm_source_name	Yes	VARCHAR(255)	The full name of the source	cdm_source
283	cdm	cdm_source	cdm_source_abbreviation	No	VARCHAR(25)	An abbreviation of the name	cdm_source
284	cdm	cdm_source	cdm_holder	No	VARCHAR(255)	The name of the organization responsible for the development of the CDM instance	cdm_source
285	cdm	cdm_source	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
286	cdm	cdm_source	source_documentation_reference	No	VARCHAR(255)	URL or other external reference to location of source documentation	cdm_source
287	cdm	cdm_source	cdm_etl _reference	No	VARCHAR(255)	URL or other external reference to location of ETL specification documentation and ETL source code	cdm_source
288	cdm	cdm_source	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
289	cdm	cdm_source	cdm_release_date	No	DATE	The date when the CDM was instantiated	cdm_source
290	cdm	cdm_source	cdm_version	No	VARCHAR(10)	The version of CDM used	cdm_source
291	cdm	cdm_source	vocabulary_version	No	VARCHAR(20)	The version of the vocabulary used	cdm_source
292	results	cohort_definition	cohort_definition_id	Yes	INTEGER	A unique identifier for each Cohort.	cohort_definition
293	results	cohort_definition	cohort_definition_name	Yes	VARCHAR(255)	A short description of the Cohort.	cohort_definition
294	results	cohort_definition	cohort_definition_description	No	VARCHAR(MAX)	A complete description of the Cohort definition	cohort_definition
295	results	cohort_definition	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
296	results	cohort_definition	cohort_definition_syntax	No	VARCHAR(MAX)	Syntax or code to operationalize the Cohort definition	cohort_definition
297	results	cohort_definition	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
298	results	cohort_definition	cohort_instantiation_date	No	DATE	A date to indicate when the Cohort was instantiated in the COHORT table	cohort_definition
299	cdm	concept	concept_id	Yes	INTEGER	A unique identifier for each Concept across all domains.	concept
300	cdm	concept	concept_name	Yes	VARCHAR(255)	An unambiguous, meaningful and descriptive name for the Concept.	concept
301	cdm	concept	domain_id	Yes	VARCHAR(20)	A foreign key to the [DOMAIN](https://github.com/OHDSI/CommonDataModel/wiki/DOMAIN) table the Concept belongs to.	concept
302	cdm	concept	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
303	cdm	concept	concept_class_id	Yes	VARCHAR(20)	The attribute or concept class of the Concept. Examples are 'Clinical Drug', 'Ingredient', 'Clinical Finding' etc.	concept
304	cdm	concept	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
305	cdm	concept	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
306	cdm	concept	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
307	cdm	concept	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
308	cdm	concept	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
309	cdm	concept_ancestor	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
310	cdm	concept_ancestor	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
311	cdm	concept_ancestor	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
312	cdm	concept_ancestor	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
313	cdm	concept_class	concept_class_id	Yes	VARCHAR(20)	A unique key for each class.	concept_class
314	cdm	concept_class	concept_class_name	Yes	VARCHAR(255)	The name describing the Concept Class, e.g. "Clinical Finding", "Ingredient", etc.	concept_class
315	cdm	concept_class	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
316	cdm	concept_relationship	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
317	cdm	concept_relationship	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
318	cdm	concept_relationship	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
319	cdm	concept_relationship	valid_start_date	Yes	DATE	The date when the instance of the Concept Relationship is first recorded.	concept_relationship
320	cdm	concept_relationship	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
321	cdm	concept_relationship	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
322	cdm	concept_synonym	concept_id	Yes	INTEGER	A foreign key to the Concept in the CONCEPT table.	concept_synonym
323	cdm	concept_synonym	concept_synonym_name	Yes	VARCHAR(1000)	The alternative name for the Concept.	concept_synonym
324	cdm	concept_synonym	language_concept_id	Yes	INTEGER	A foreign key to a Concept representing the language.	concept_synonym
325	cdm	domain	domain_id	Yes	VARCHAR(20)	A unique key for each domain.	domain
326	cdm	domain	domain_name	Yes	VARCHAR(255)	The name describing the Domain, e.g. "Condition", "Procedure", "Measurement" etc.	domain
327	cdm	domain	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
328	cdm	drug_strength	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
329	cdm	drug_strength	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
330	cdm	drug_strength	amount_value	No	FLOAT	The numeric value associated with the amount of active ingredient contained within the product.	drug_strength
331	cdm	drug_strength	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
332	cdm	drug_strength	numerator_value	No	FLOAT	The numeric value associated with the concentration of the active ingredient contained in the product	drug_strength
333	cdm	drug_strength	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
334	cdm	drug_strength	denominator_value	No	FLOAT	The amount of total liquid (or other divisible product, such as ointment, gel, spray, etc.).	drug_strength
335	cdm	drug_strength	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
336	cdm	drug_strength	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
337	cdm	drug_strength	valid_start_date	Yes	DATE	The date when the Concept was first recorded. The default value is 1-Jan-1970.	drug_strength
338	cdm	drug_strength	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
339	cdm	drug_strength	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
340	cdm	relationship	relationship_id	Yes	VARCHAR(20)	The type of relationship captured by the relationship record.	relationship
341	cdm	relationship	relationship_name	Yes	VARCHAR(255)	The text that describes the relationship type.	relationship
342	cdm	relationship	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
343	cdm	relationship	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
344	cdm	relationship	reverse_relationship_id	Yes	VARCHAR(20)	The identifier for the relationship used to define the reverse relationship between two concepts.	relationship
345	cdm	relationship	relationship_concept_id	Yes	INTEGER	A foreign key that refers to an identifier in the CONCEPT table for the unique relationship concept.	relationship
346	cdm	source_to_concept_map	source_code	Yes	VARCHAR(50)	The source code being translated into a Standard Concept.	source_to_concept_map
347	cdm	source_to_concept_map	source_concept_id	Yes	INTEGER	A foreign key to the Source Concept that is being translated into a Standard Concept.	source_to_concept_map
348	cdm	source_to_concept_map	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
349	cdm	source_to_concept_map	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
350	cdm	source_to_concept_map	target_concept_id	Yes	INTEGER	A foreign key to the target Concept to which the source code is being mapped.	source_to_concept_map
351	cdm	source_to_concept_map	target_vocabulary_id	Yes	VARCHAR(20)	A foreign key to the VOCABULARY table defining the vocabulary of the target Concept.	source_to_concept_map
352	cdm	source_to_concept_map	valid_start_date	Yes	DATE	The date when the mapping instance was first recorded.	source_to_concept_map
353	cdm	source_to_concept_map	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
354	cdm	source_to_concept_map	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
355	cdm	vocabulary	vocabulary_id	Yes	VARCHAR(20)	A unique identifier for each Vocabulary, such as ICD9CM, SNOMED, Visit.	vocabulary
356	cdm	vocabulary	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
357	cdm	vocabulary	vocabulary_reference	Yes	VARCHAR(255)	External reference to documentation or available download of the about the vocabulary.	vocabulary
358	cdm	vocabulary	vocabulary_version	Yes	VARCHAR(255)	Version of the Vocabulary as indicated in the source.	vocabulary
359	cdm	vocabulary	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