Table 3.

Baseline risk factors for HBV infection among the students

Year of study	Pre-clinical N=74 Number (%)	Clinical N=108 Number(%)	Odd Ratios (95% CI)	p-value
Having a sexual relationship	24 (32.4)	52 (48.1)	0.52 (0.27–1.00)	0.035
History of STDs	7 (9.6)	3 (2.8)	3.66 (0.79–22.51)	0.105
History of blood transfusion	4 (5.4)	7 (6.6)	0.82 (0.17–3.39)	0.988
History of surgery	37 (50.7)	67 (65.7)	0.61 (0.32–1.16)	0.066
History of injections	64 (86.5)	96 (88.9)	0.80 (0.30–2.20)	0.797
Not immunized for HBV	72 (98.6)	101(93.5)	2.50 (0.46–25.19)	0.203
History of unprotected exposure to body fluids /needlestick injury	11 (14.9)	82 (75.9)	0.06 (0.02–0.13)	<0.001