Fig. 2

Cumulative incidence of viral failure (VF) and AIDS-related death in the different groups. a Cumulative incidence of VF among different groups, and b cumulative incidence of AIDS-related death among different groups. Patients were divided into four groups: viral suppressed (all VLs < 20 copies/ml), low LLV (20 copies/ml ≤ VL ≤ 200 copies/ml), high LLV (200 copies/ml < VL ≤ 400 copies/ml) and non-suppressed (VL > 400 copies/ml), based on the viral loads detected between 6 months after ART initiation and a certain outcome. Number at risk represents the number of patients who did not have VF and AIDS-related death, over different duration of ART in these four groups