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

Table 2

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

Variable	Total number	HBsAg
	N	n	% (95% CI)	value
Age group
<5	9,268	358	3.8 (7.6–12.6)	= 0.001
5–12	10,864	325	3.2 (6.4–13.6)
13–24	131,352	5,381	4.1 (57.6–65.4)
≥25	944,077	69,532	7.4 (52.1–66.7)
Sex
Female	670,040	33,801	5.0 (67.2–78.1)	= 0.001
Males	425,521	41,795	9.8 (52.1–79.3)
Year
2014	49,963	4,006	8.0 (53.7–63.8)	= 0.001
2015	147,290	10,638	7.2 (61.0–69.4)
2016	209,900	15,580	7.4 (65.7–73.8)
2017	226,444	16,277	7.2 (78.3–92.2)
2018	206,227	13,600	6.6 (55.5–66.9)
2019	255,737	15,495	6.1 (58.1–70.1)
Total	1,095,561	75,596	6.9