|Type of retention||Definition of a patient ‘alive and retained in care’ at 12 months post-ART initiation||Failure event|
|‘Point’ retention||Alive and had a visit at the health facility 12 months post-ART initiation or if was known to have had a visit at a health facility any time after||Death, LTFU, and transfer-out are counted if they occurred within the first 12 months post-ART initiation|
|WHO||Attendance at a health facility at 12 months post-ART initiationa, or at any time up to 3 months later||Death, LTFU, and transfer-out are counted if they occurred within the first 15 months post-ART initiation.|
Patients transferred out were right-censored at the date of transfer-out
|MOH||Attendance at a health facility at 12 months post-ART initiationa||Death or LTFU are counted if either occurred within the first 12 months post-ART initiation|
Patients transferred out are excluded from the analysis
|IATT||Attendance at a health facility and on treatment at 1, 2, 3, 6, 9, and 12 months post-ART initiation b||Death, LTFU, transfers-out and failure to attend either the 1-, 2-, 3-, 6-, 9-, or 12-month visit, whichever comes first|
Patients are right-censored at the date of the 1st failure event.
|‘Appointment adherence’ retention||Attendance at a health facility at 12-months post-ART initiation aand ≥ 75% of appointment adherence to scheduled visits|
‘Appointment adherence’ was estimated using the number of visits attended divided by the number of total scheduled visits during the 12-month observation period
|‘On-time adherence’ retention||Attendance at a health facility at 12 months post-ART initiation aand ≥ 75% of ‘on-time attendance to scheduled visits|
A visit on time is defined as a visit that occurred within +/− 15 days of the date of the expected scheduled visit
‘On-time adherence’ is estimated using the number of visits attended on-time divided by the number of total scheduled visits.
Unscheduled visits occurring before the date of appointment were not counted as missed visits
|Death, LTFU, transfer-out, and failure to attend a visit on-time, whichever comes first.|
Patients were right-censored at the date of the 1st failure event