Randomization procedure Randomization and concealment This was done to minimize systematic bias in the allocation of patients to the intervention or non-intervention study arms. I used stratified block randomization to restrict chance imbalances so as to ensure that the study arms were as alike as possible for patient enrollment factors, including key factors such as sex and CD4 which can have an effect on the outcomes such as adherence to pre-ART scheduled clinic appointments. A set of permuted blocks were generated for each combination of stratification factors. In this study, these factors included patient sex and CD4 cell count.