Table 2. Effect of different factors on immunity after hepatitis B vaccination using logistic regression analysis.

Variable	Univariate analysis (95% CI)	Multivariate analysis (95% CI)
Gender (Female)	1.9 (0.84-4.7)	1.68 (0.66-4.26)
Age	0.95 (0.89-1.0)	0.96 (0.91-1.0)
Smoking	0.87 (0.16-4.7)	0.95 (0.19-5.9)
BMI	0.92 (0.76-1.11)	0.91 (0.74-1.12)
Group (trial)	0.61 (0.26-1.42)	0.64 (0.26-1.56)