Adjusted mean viral load (log) by time period of assessment and by adherence/risk group classification. HALR, high adherence, low risk (n=51); HAHR, high adherence, high risk (n=37); LALR, low adherence, low risk (n=40); LAHR, low adherence, high risk (n=56). Bars with the same letters on top differ significantly with each other at p<0.05 for the time comparisons and p<0.001 for the group comparisons. Covariates included intervention group, intervention attendance, age at baseline, and number of years HIV-positive.