Table 2.

Population attributable fraction of HIV incidence attributable to HSV-2 infection, by age, sex and period^*

	PAFs [95% CI]
	1990–1994	1995–1999	2000–2004	2005–2007	Overall
Men and women
Aged below 28 years
Incident	3	16	9	15	10
Prevalent	51	60	68	52	62
Overall	55 [2, 79]	79 [54, 90]	79 [59, 89]	75 [12, 93]	75 [63, 83]
Aged 28 years and above
Incident	0	21	−1	20	6
Prevalent	52	−7	69	20	30
Overall	52 [−54, 85]	−4 [NE]	70 [0, 91]	35 [−105, 79]	34 [2, 56]
Men and women, overall
Incident	2	15	10	16	12
Prevalent	47	39	65	36	51
Overall	50 [10, 72]	55 [30, 72]	75 [56, 85]	57 [1, 81]	64 [51, 73]
Men only
Aged below 30 years
Incident	13	9	−1	26	6
Prevalent	18	67	71	41	61
Overall	39 [−111, 82]	76 [32, 92]	67 [14, 87]	73 [≤10, 99]	68 [41, 82]
Aged 30 years and above
Incident	−1	30	−1†	−2	9
Prevalent	63	6	52†	33	35
Overall	63 [−138, 94]	18 [−52, 56]	39 [−65, 77]	33 [−313, 89]	41 [−2, 66]
Men, overall
Incident	10	18	−1	10	7
Prevalent	39	44	68	43	53
Overall	48 [−35, 80]	62 [26, 80]	64 [24, 83]	56 [≤10, 100]	61 [40, 74]
Women only
Aged below 25 years
Incident	−1	12	11	18	10
Prevalent	57	57	71	38	64
Overall	54 [−18, 82]	72 [25, 89]	86 [60, 95]	70 [−31, 93]	76 [59, 86]
Aged 25 years and above
Incident	−1	25	15	18	17
Prevalent	42	−11	62	21	30
Overall	42 [−146, 86]	−9 [NE]	74 [−56, 96]	32 [−186, 84]	40 [−9, 67]
Women, Overall
Incident	−2	15	15	19	14
Prevalent	46	41	66	35	53
Overall	44 [−14, 73]	57 [18, 77]	82 [58, 92]	59 [−11, 85]	67 [52, 78]

NE, Note estimated because computationally minute.

^*Adjusted by residence status, religion, marital status and age (if not categorised by age).

^†Not adjusted by marital status as all HIV seroconverters were married.