Table 3: Baseline characteristics of the study population by patient ethnicity: median or proportion of column total; numbers in parentheses represent missing observations
VariableAfrican ancestry
n = 1303
Other ethnicity
n = 7373
Unknown ethnicity
n = 1096
Total
n = 9772
Age, yr, median33353635
Sex, female0.550.120.190.19
Likely mode of transmission
Heterosexual0.680.140.130.21
Men who have sex with men0.150.680.350.57
Injection drug use0.010.110.170.11
Other or unknown0.150.070.360.11
Hepatitis C co-infection0.03 (201)0.18 (810)0.19 (353)0.16 (1364)
Hepatitis B co-infection0.06 (192)0.04 (1078)0.02 (549)0.04 (1819)
Calendar year of cohort enrolment
Before 20000.090.210.220.20
2000−20040.400.380.430.39
2005–20090.510.410.350.42
No. of CD4 cell count measurements, median5656
CD4 cell count, cells/μL, median400470470460
CD4%, median23 (225)26 (932)26 (51)26 (1208)
CD8 cell count, cells/μL, median880 (275)940 (1163)900 (53)920 (1491)
HIV RNA, log copies/mL, median4.0 (10)4.4 (56)4.5 (3)4.3 (69)
Follow-up time, yr, median1.421.761.561.69