Table 5. HBeAg results and proportion positive by five-year age groups (a) and province (b).

		HBeAg
		Negative (#)	Positive (#)	Total (#)	Proportion HBeAg positive (95% CI)
Age group (a)	15–19	33	4	37	0.11 (0.04–0.26)
	20–24	89	12	101	0.12 (0.07–0.20)
	25–29	108	5	113	0.04 (0.02–0.100
	30–34	99	9	108	0.08 (0.04–0.15)
	35–39	50	4	54	0.07 (0.03–0.18)
	40–44	9	3	12	0.25 (0.08–0.55)
	Unknown	32	7	39	0.18 (0.09–0.33)
Province (b)	Eastern Cape	34	6	40	0.15 (0.07–0.30)
	Free State	29	1	30	0.03 (0.00–0.20)
	Gauteng	28	2	30	0.07 (0.02–0.23)
	KwaZulu-Natal	154	11	165	0.07 (0.04–0.120
	Limpopo	55	5	60	0.08 (0.04–0.19)
	Mpumalanga	29	6	35	0.17 (0.08–0.33)
	North West	33	12	45	0.27 (0.16–0.41)
	Northern Cape	12	0	12	0.00 (–)
	Western Cape	46	1	47	0.02 (0.00–0.14)
	Total	420	44	464	0.09 (0.07–0.13)