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 | Not applicable |
‘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 |