Table 3.

Potential risk factors for contracting hepatitis B core antibody (HBcAb) in patients receiving haemodialysis in Sana'a, 2016.

Characteristics		HBcAb positive		HBcAb negative		χ2	OR	CI		P-valueb
		n	%	n	%			Lower	Upper
Duration of dialysis (years)	<1	1	16.7	5	83.3	2.47a	0.20	0.22	1.79	0.20
	≥1	37	50	37	50
Blood transfusion	Yes	13	54.2	11	45.8	0.61	1.46	0.56	3.82	0.47
	No	25	44.6	31	55.4
Surgical history	Yes	2	66.7	1	33.3	0.62a	2.27	0.19	26.1	0.60
	No	36	46.8	41	53.2
Dental procedure	Yes	0	0	4	100	0.38a	0.20	1.58	2.50	0.11
	No	38	50	38	50
Dialysis outside specified the aimes of the study	Yes	1	100	0	0	1.16a	2.13	1.68	2.70	0.47
	No	37	46.8	42	53.2
Family history	Yes	0	0	0	0	Undefined
	No	38	47.7	42	52.5
Mix factors	Yes	21	50	21	50	0.55	1.11	0.46	2.67	0.82
	No	17	44.7	21	55.3

OR, odds ratio; CI, confidence interval.

^aFisher's exact test, χ²≥3.9.

^bP≤0.05 was considered to indicate significance.