Prevalence of Hepatitis B Virus Infection among Pregnant Women Attending Antenatal Clinics in Vientiane, Laos, 2008–2014

Table 1

Estimates and significance of the logistic regression model explaining the positivity to HBsAg as a function of age and year. Polynomial terms to the third order were not significant and thus not included in the final model. Probabilities presented here account for potential confounding; see Materials and Methods for further detail.

	Estimate	Std. error	Chisq value	Pr(>Chisq)
Intercept	85.550251	38.790690	—	—
Year		0.019298	5.1992	0.0226
Age		0.007763	0.1138	0.7358