In multivariable Cox analyses, CCASAnet patients had a higher hazard of mortality after ART initiation (adjusted hazard ratio (AHR) 1.61; 95% CI: 1.32 to 1.96), adjusting for age, sex, CD4 count, year of ART initiation, intravenous drug use, prior AIDS diagnosis and ART regimen (Table 2). Here, CD4 is linked to AIDS.