OMOP/rmd/cdm54Changes.rmd

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---
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# **Changes by Table**
*from CDM v5.3 -> CDM v5.4*
For a full description of each table and field listed here, please see the [CDM specification](http://ohdsi.github.io/CommonDataModel/cdm54.html).
Notation:
- a **\+** indicates an addition to the model, either a table or field
- a **->** indicates an alteration either in naming or specification
- a **-** indicates a subtraction from the model, either a table or field
## PERSON
- No change
## OBSERVATION_PERIOD
- No change
## VISIT_OCCURRENCE
- Admitting_source_concept_id -> **Admitted_from_concept_id**
- Admitting_source_value -> **Admitted_from_source_value**
- Discharge_to_concept_id -> **Discharged_to_concept_id**
- Discharge_to_source_value -> **Discharged_to_concept_id**
## VISIT_DETAIL
- Admitting_source_concept_id -> **Admitted_from_concept_id**
- Admitting_source_value -> **Admitted_from_source_value**
- Discharge_to_concept_id -> **Discharged_to_concept_id**
- Discharge_to_source_value -> **Discharged_to_concept_id**
- Visit_detail_parent_id -> **Parent_visit_detail_id**
## CONDITION_OCCURRENCE
- No change
## DRUG_EXPOSURE
- No change
## PROCEDURE_OCCURRENCE
- \+ **Procedure_end_date**
- \+ **Procedure_end_datetime**
## DEVICE_EXPOSURE
- Unique_device_id -> **Changed to varchar(255)**
- \+ **Production_id**
- \+ **Unit_concept_id**
- \+ **Unit_source_value**
- \+ **Unit_source_concept_id**
## MEASUREMENT
- \+ **Unit_source_concept_id**
- \+ **Measurement_event_id**
- \+ **Meas_event_field_concept_id**
## OBSERVATION
- \+ **Value_source_value**
- \+ **Observation_event_id**
- \+ **Obs_event_field_concept_id**
## DEATH
- No change
## NOTE
- \+ **Note_event_id**
- \+ **Note_event_field_concept_id**
## NOTE_NLP
- No change
## SPECIMEN
- No change
## FACT_RELATIONSHIP
- No change
## LOCATION
- \+ **Country_concept_id**
- \+ **Country_source_value**
- \+ **Latitude**
- \+ **Longitude**
## CARE_SITE
- No change
## PAYER_PLAN_PERIOD
- No change
## COST
- No change
## DRUG_ERA
- No change
## DOSE_ERA
- No change
## CONDITION_ERA
- No change
## \+ **EPISODE**
| EPISODE |
|----------------------------------|
| episode_id |
| person_id |
| episode_concept_id |
| episode_start_date |
| episode_start_datetime |
| episode_end_date |
| episode_end_datetime |
| episode_parent_id |
| episode_number |
| episode_object_concept_id |
| episode_type_concept_id |
| episode_source_value |
| episode_source_concept_id |
## \+ **EPISODE_EVENT**
| EPISODE_EVENT |
|------------------------------------|
| episode_id |
| event_id |
| episode_event_field_concept_id |
## METADATA
- \+ **Metadata_id**
- \+ **Value_as_number**
## CDM_SOURCE
- Cdm_source_name -> **Mandatory field**
- Cdm_source_abbreviation -> **Mandatory field**
- Cdm_holder -> **Mandatory field**
- Source_release_date -> **Mandatory field**
- Cdm_release_date -> **Mandatory field**
- \+ **Cdm_version_concept_id**
## CONCEPT
- No change
## VOCABULARY
- Vocabulary_reference -> **Non-mandatory field**
- Vocabulary_version -> **Non-mandatory field**
## DOMAIN
- No change
## CONCEPT_CLASS
- No change
## CONCEPT_RELATIONSHIP
- No change
## RELATIONSHIP
- No change
## CONCEPT_SYNONYM
- No change
## CONCEPT_ANCESTOR
- No change
## SOURCE_TO_CONCEPT_MAP
- No change
## DRUG_STRENGTH
- No change
## - **ATTRIBUTE_DEFINITION**
## \+ **COHORT**
| COHORT |
|------------------------------------|
| cohort_definition_id |
| subject_id |
| cohort_start_date |
| cohort_end_date |