Table 2. Overall, pre- and post-delivery HIV incidence by age group among women attending ANC in Lesotho.

Period		No. of new HIV positives	N	Total person years follow-up	Incidence Risk [95% CI]	Incidence Rate [95% CI] (per 100 person years)
Overall	All women	28	850	1777.0	3.3% [2.2–4.7]	1.58 [1.05–2.28]
	16–19 years	8	180	365.1	4.4% [1.9–8.6]	2.19 [0.95–4.32]
	20–24 years 25–45 years	15 5	325 345	663.6 748.3	4.6% [2.6–7.5] 1.4% [0.5–3.3]	2.26 [1.26–3.73] 0.67 [0.22–1.56]
Pre-delivery	All women	8	850	306.8	0.9% [0.4–1.8]	2.61 [1.12–5.14]
	16–19 years	2	180	66.1	1.1% [0.1–4.0]	3.02 [0.37–10.93]
	20–24 years 25–45 year	4 2	325 345	115.9 124.7	1.2% [0.3–3.1] 0.6% [0.1–2.1]	3.45 [0.94–8.83] 1.60 [0.19–5.79]
Postpartum	All women	20	842	1470.2	2.4% [1.4–3.6]	1.36 [0.83–2.10]
	16–19 years	6	178	299.0	3.4% [1.2–7.2]	2.01 [0.74–4.37]
	20–24 years 25–45 years	11 3	321 343	547.7 623.5	3.4% [1.7–6.0] 0.9% [0.2–2.5]	2.01 [1.00–3.59] 0.48 [0.10–1.41]