Multiple logistic regression was used for variable adjustment,whose criterion for variable inclusion was the association with the dependent variable in the bivariate analysis with p-value < 0.20. The variables were included in the regression analysis using the ‘enter’ method, according
to the decreasing value of odds ratio. The Hosmer-Lemeshow test was used as a measure of quality-of-fit for the logistic regression models, in which a p-value ≥ 0.05 indicates that the model is adjusted.