Both groups were well balanced except for prior AIDS (OR = 1.65; 95%CI: 1.03–2.64, P = 0.0359), a CD4 cell nadir <200 cells/mm3 (OR = 1.69; 95%CI: 1.07–2.66, P = 0.0244), and a higher baseline viral load ≥5 log10 (OR = 2.13; 95%CI: 1.33–3.42, P = 0.0012) more frequent among HALS patients, as expected. This evidence concerns the gene CD4 and AIDS.