Table 2: Baseline characteristics of the study population by HIV-1 subtype: median or proportion of column total; numbers in parentheses represent missing observations

Variable	HIV-1 subtype						Total
Variable	A	CRF01_AE	CRF01_AG	B	C	G	Total
Total cases	356	193	352	7937	822	112	9772
Age, yr, median	34	38	34	35	33	33	35
Sex, female	0.53	0.24	0.57	0.11	0.59	0.48	0.19
Likely mode of transmission
Heterosexual	0.70	0.58	0.74	0.10	0.71	0.71	0.21
Men who have sex with men	0.14	0.32	0.12	0.67	0.09	0.15	0.57
Injection drug use	0.06	0.03	0.00	0.12	0.02	0.08	0.11
Other or unknown	0.10	0.08	0.14	0.11	0.18	0.06	0.11
African ancestry	0.49 (20)	0.03 (13)	0.60 (52)	0.05 (973)	0.72 (30)	0.55 (8)	0.15 (1096)
Hepatitis C co-infection	0.10 (43)	0.06 (18)	0.03 (22)	0.18 (1094)	0.04 (172)	0.13 (15)	0.16 (1364)
Hepatitis B co-infection	0.05 (42)	0.03 (19)	0.06 (31)	0.04 (1550)	0.04 (163)	0.02 (14)	0.04 (1819)
Calendar year of cohort enrolment
Before 2000	0.15	0.09	0.06	0.22	0.07	0.07	0.20
2000–2004	0.44	0.39	0.38	0.38	0.39	0.28	0.39
2005–2009	0.41	0.51	0.56	0.39	0.54	0.65	0.42
No. of CD4 cell count measurements, median	6	6	5	6	5	5	6
CD4, cells/μL, median	420	450	440	470	400	420	460
CD4%, median	24 (73)	27 (32)	24 (42)	26 (901)	23 (143)	23 (17)	26 (1208)
CD8, cells/μL, median	910 (82)	900 (39)	860 (50)	930 (1125)	900 (177)	850 (18)	920 (1491)
HIV RNA, log copies/mL, median	4.1 (13)	4.2 (1)	4.1 (2)	4.4 (44)	4.0 (9)	4.1	4.3 (69)
Follow-up time, yr, median	1.59	1.78	1.40	1.75	1.39	1.51	1.69