CD4 and hepatitis C virus infection: Baseline median age was 36.2 years (IQR 30.5 to 42.6), BMI 20.2 kg/m2 (IQR 18.2 to 22.4), absolute CD4 cell count 120 cells/mm3 (IQR 33 to 324) and nadir CD4 cell count 119 cells/mm3 (IQR 33 to 323); and 1408 of 199,707 (0.7%) had a history of hepatitis C infection.