| Format/Length: | an7 YYYY-MM |
| National Codes: | |
| Default Codes: |
Notes:
YEAR AND MONTH FIRST STARTED ANTIRETROVIRAL THERAPY is the same as attribute ACTIVITY DATE.
YEAR AND MONTH FIRST STARTED ANTIRETROVIRAL THERAPY is the year and month a PATIENT first started Antiretroviral Therapy, either abroad or in the United Kingdom, as stated by the PATIENT or obtained from clinical records.