In adjusted analyses of attrition from ART care, patients with a CD4 count <50 cells/μL had higher attrition than patients with CD4 count >350 cells/μL (HR: 1.88; CI: 1.15–3.06), patients with a positive syphilis diagnosis at ART initiation had higher attrition (HR: 2.23; CI: 1.35–3.68) and patients with missing weight at ART initiation had higher attrition than those with normal weight (>25th percentile of weight by gender) (HR: 2.61; CI: 1.44–4.76). This evidence concerns the gene CD4 and syphilis.