Characteristics at the first semiannual follow-up visit in 2007 (visit 1) comparing individuals who started with mono/dual ART and cART.

1P-values for comparison of mono/dual and cART era are calculated from chi-square tests (categorical variables) or from Wilcoxon-Mann-Whitney tests (continuous variables).2By definition, one failure event was added to all patients from the mono/dual era. Therefore, no patients from the mono/dual era can have 0 regimen previously failed.