Figure 1. Subjects Attrition over Time.
Ineligible subjects: 1. ART initiation regimens were not D4T+3TC+NVP, D4T+3TC+EFV, AZT+3TC+NVP, AZT+3TC+EFV: n = 806; 2. ART termination or death date were prior to ART initiation date (data entry error): n = 10; 3. Not ART naïve at enrollment: n = 423; 4. Age <18 years old or missing at ART initiation: n = 82; 5. Gender missing: n = 13.