Table 2.

Prevalence of hepatitis B virus serological markers among Afro-descendants in Central Brazil, 2015–2016.

Category	Serological marker	All Afro-descendants		Furnas dos Dionísios		São Benedito		p-value
		(N = 331)		(N = 207)		(N = 124)
		n (%)	95% CI¹	n (%)	95% CI¹	n (%)	95% CI¹
HBV exposure
	HBsAg/anti-HBc	18 (5.4)	3.4–8.5	12 (5.8)	3.3–10.0	6 (4.9)	2.2–10.5	0.710
	Alone Anti-HBc	5 (1.5)	0.6–3.6	1 (0.5)	0.0–3.4	4 (3.2)	1.2–8.4	0.048*
	Anti-HBc/anti-HBs	77 (23.3)	19.0–28.1	60 (29.0)	23.2–35.6	17 (13.7)	8.6–21.1	0.001*
	Any HBV infection marker	100 (30.2)	25.5–35.4	73 (35.3)	29.0–42.1	27 (21.8)	15.3–30.0	0.010*
Vaccination like profile	Alone anti-HBs	144 (43.5)	38.2–48.9	95 (45.9)	39.2–52.8	49 (39.5)	31.2–48.5	0.257
Not exposed, susceptible	Absence of marker	87 (26.3)	21.8–31.3	39 (18.8)	14.0–24.8	48 (38.7)	30.5–47.7	<0.001*

(¹) Confidence Interval.