Sources of data
The primary data source for this analysis was the trial database, which provided information on trial registrations and exits; uptake and results of home‐based rapid HIV testing; clinic visits of PLHIV seen in trial clinics; and sociodemographic and behavioural characteristics collected at home every 6-monthly survey round through questionnaires. This main trial database was merged with the linkage-to-care intervention database of all forms filled at each tracking attempt, indicating the type of contact attempt (phone call or home visit) and whether the person answered his/her phone or opened his/her door.In addition, two data sources were used to capture information from PLHIV seen in local DoH clinics: (a) viral loads and CD4 counts from National Health Laboratory Service (NHLS); and (b) ART clinic visits and ART prescriptions from the AHRI clinical database (ACCDB) which is managed by the district DoH and AHRI. Both NHLS and the ACCDB database contain data from Hlabisa primary care clinics since 2004 [