Table 1.

Temporal trends in HIV prevalence by age in pregnant women attending prenatal clinics in Vulindlela, rural KwaZulu-Natal by survey periods 2001–2003, 2004–2008 and 2009–2013.

Age group	2001–2003		2004–2008		2009–2013		p-value†
	n/N	% (95%CI)	n/N	% (95%CI)	n/N	% (95%CI)
<20	60/267	22.5 (17.5–27.5)	133/644	20.7 (17.5–23.8)	109/633	17.2 (14.3–20.2)	0.046
20–24	101/222	45.5 (38.9–52.0)	262/593	44.2 (40.2–48.2)	230/607	37.9 (34.0–41.8)	0.018
25–29	79/165	47.9 (40.3–55.5)	190/323	58.8 (53.5–64.2)	232/403	57.6 (52.7–62.4)	0.085
30–34	20/75	26.7 (16.7–36.7)	126/227	55.5 (49.0–62.0)	151/252	59.9 (53.9–66.0)	<0.001
≥35	17/62	27.4 (16.3–38.5)	52/169	30.8 (23.8–37.7)	94/176	53.4 (46.0–60.8)	<0.001
Total*	345/977	35.3 (32.3–38.3)	778/1996	39.0 (36.8–41.1)	826/2102	39.3 (37.2–41.4)	0.058

^*includes women with missing age

^†Cochran-Armitage χ² test for linear trend