Seroprevalence of hepatitis B virus infection and associated factors among healthcare workers in northern Tanzania

Table 4 HBV infection by past exposure to potential risk factors among HCWs at KCMC Moshi Tanzania 2016/17

Variable	Total	Serology n (%)		χ^2*	p-value
Variable	Total	Negative	Positive
History of surgery*				8.897	0.003**
Yes	144	129 (89.6)	15 (10.4)
No	295	285 (96.6)	10 (3.4)
History of blood splash to the eyes or mouth*				2.137	2.26**
Yes	121	111 (91.7)	10 (8.3)
No	316	301 (95.3)	15 (4.7)
Don’t know	2	2 (100)	0 (0)
Ever had intravenous injections*				0.446	0.78**
Yes	365	343 (94.0)	22 (6.0)
No	74	71 (96.0)	3 (4.0)
Ever had intramuscular injections*				0.414	0.75**
Yes	386	363 (94.0)	23 (6.0)
No	53	51 (96.2)	2 (3.8)
History of needle stick injury*				0.452	0.50
Yes	165	154 (93.3)	11 (6.8)
No	273	259 (94.9)	14 (5.1)
History of invasive procedure such as endoscopy*				0.151	1.00**
Yes	39	37 (94.9)	2 (5.1)
No	397	374 (94.2)	23 (5.8)
Don’t know	2	2 (100)	0 (0)
Ever had blood transfusion*				65.946	< 0.001
Yes	34	22 (64.7)	12 (35.3)
No	399	388 (97.2)	11 (2.8)
HBV Vaccine uptake*				23.420	< 0.001**
Yes	293	289 (98.6)	4 (1.4)
No	142	125 (88.0)	17 (12.0)
Knowledge on HBV infection				5.886	0.04**
Poor	108	98 (90.7)	10 (9.3)
Fair	217	204 (94.0)	13 (6.0)
Good	114	112 (98.2)	2 (1.8)

*Frequencies do not tally to the total due to missing values either in the outcome variable (serology status) or the independent variables, this also causes variations from numbers in Table 4; **p-value by Fisher’s exact estimation

ISSN: 1471-2334