Hepatitis B Virus Immunity Gap: A Six-Year Laboratory Data Review of Hepatitis B Serological Profiles in Gauteng Province, South Africa

Table 3

The distribution of positive anti-HBc total per year across all age groups and sex in Gauteng Province, 2014–2019.

Variable	Total number	Anti-HBc total
	N	n	% (95% CI)	value
Age group
<5	2,092	313	14.9 (7.7–11.1)	= 0.002
5–12	2,063	171	8.3 (2.5–4.4)
13–24	10,957	1,786	16.3 (7.4–8.7)
≥25	78,599	32,104	40.8 (33.4–44.2)
Sex
Female	53,299	17,023	32.0 (39.8–40.2)	= 0.006
Males	40,412	17,351	43.0 (42.3–42.7)
Year
2014	14,606	4,923	33.7 (18.9–20.5)	< 0.001
2015	19,852	7,036	35.4 (18.2–25.8)
2016	22,955	8,335	36.3 (19.5–21.7)
2017	12,916	5,029	39.0 (23.7–27.8)
2018	11,791	4,763	40.4 (23.7–28.2)
2019	11,591	4,288	37.0 (23.5–28.8)
Total	93,711	34,374	37.0