Table 1. Operational definitions for ART outcomes for PLHIV, Zimbabwe (2015–19).

Outcome	Operational Definition
Alive and on treatment	Adults and children with HIV known to be on treatment
Transferred out	Documented transfer status in the ePMS/individual ART booklet
Died	Documented with a death outcome in the ePMS/individual ART booklet
Lost to follow up	Patients who have not attended their last scheduled review visit or pill pick-up visit by more than 90 days from the date of data collection.
Stopped treatment	Documented as having stopped ART in the individual ART booklet, pre- ART or ART registers
Attrition	Death, loss to follow up and stopped treatment combined
Retained in care	Alive and on treatment and transferred out combined. Patients that are transferred out were censored on their last recorded visit to ART site

HIV: human immunodeficiency virus; PLHIV: people living with HIV; ART: antiretroviral therapy; ePMS: electronic patient management system.