CD4 and cancer: The proportion of HPV-positive women increased with decrease in CD4 (cluster of differentiation 4) count (64% in CD4 < 200/mm3 vs 31.1% in CD4 > 500/ mm3, P = 0.001, chi-square for trend) and increase in HIV viral load (36.3% in <=20 copies/ml vs 50% in > 20 copies/ml, P = 0.02, independent chi-square), however small numbers precluded trend analysis of precancer/cancer.