CD4 and AIDS: 2777 (6.8%) switched regimen, 1132 (2.8%) loss to follow-up (LTFU), 14,366 (39.5%) achieved a CD4 > 500 from the 36,396 patients with initial CD4 < 500, and 656 (1.6%; 393 AIDS-related death and 263 non-AIDS-related death) died during 65,578 person-years of follow-up (median 1.6 years [IQR 1.0–2.2]).