Demographics, socioeconomic and clinical characteristics and bivariate analysis for the association with a) virologic and b) immunologic failure among 456 patients on ART in Soweto, South Africa.

*2-sided Fisher exact test;**All patients were initiated on an NNRTI-based regimen (the majority had efavirenz);#Two patients (2/458) were excluded due to missing longitudinal data;∧Two repeated VL >50 copies/ml post-three months on ART;∧∧WHO criteria for immunologic failure;##Two patients were exposed to sdNVP and ART, pre-ART initiation, but virologically suppressed.$Treatment interruption: once for 129 patients and twice for 3 patients.