How added columns are populated

PATIENT_ID

PATIENT_ID is derived from PERSON_ID by converting to a VARCHAR2. The string is zero-filled to maintain sort order in the Empirica Healthcare Analysis application. A leading 1 is prepended to the value because the Empirica Healthcare Analysis application requires this format.

The maximum number of allowed digits in PATIENT_ID is 10 and in PERSON_ID is 9.

(Multiple columns used for coded fields)

<value>_CD fields, such as RACE_CD, are derived by selecting the CONCEPT_NAME from the CONCEPT table, based on the value of the corresponding <value>_concept_id field.

ENROLLMENT_START_DATE

ENROLLMENT_END_DATE

The SELECTED_OBSERVATION_PERIOD view is created and contains one row for each person, with the OBSERVATION_START_DATE and OBSERVATION_END_DATE for the longest enrollment period (as determined by subtracting START_DATE from END_DATE). If more than one record exists with the longest duration, the earliest observation period is selected.

AGE

Age, in years, is either derived or populated:

• If compute_age in the etl.properties field is set to 'Y', this value is either derived by subtracting YEAR_OF_BIRTH from the year part of ENROLLMENT_START_DATE, or populated with values from the database field that you specify in age_column.
• If compute_age is set to 'N' and you specify a column name in age_column in the etl.properties file, this field is populated with values from the database field that you specify.
• If compute_age is set to 'N' and you do not specify a column name in age_column, this field is null.

AGE_GROUP

AGE_GROUP is derived from AGE when compute_age in the etl.properties file is set to ‘Y’. Each patient has one of the following values:

'00-04'

'05-14'

'15-17'

'18-24'

'25-34'

'35-44'

'45-64';

‘65+’

'UNK' (if AGE is null)

When compute_age is set to 'N', this field is null.

DURATION

Duration is derived by subtracting DRUG_ERA_START_DATE from DRUG_ERA_END_DATE + 1.