Longitudinal engagement trajectories of new ART starters in Zambia (<i>n =</i> 38,879).

Group-based trajectory models used sampling weights to account for updated vital statuses after tracing a random sample of patients who were considered lost to follow-up as of July 31, 2015. Grey circles represent deaths and are sized according to sampling weights. All patients included in the model had at least 180 days of observation time, which is represented by the grey dashed line. ART, antiretroviral therapy; LTFU, loss to follow-up; MPR, medication possession ratio.