The 3 groups were similar with respect to age (p = 0.106), gender (p = 0.103), percentage of patients with viral suppression (p = 0.602), and CD4 T-cell count (p = 0.739), but not by time with infection, which was higher in patients from the “high-risk" tertile with respect to the “low-risk" tertile (9.4 years vs 7.8 years, p = 0.043). This evidence concerns the gene CD4 and infection.