Risk factors for HIV infection using pooled data from the 1998 and 2008 surveys in the general population of Cotonou, Benin.

1The p-value for the interaction term between age and study round among men was 0.0005 (Llikelihood Ratio Test);&95% confidence interval from multivariate logistic regression taking into account the cluster effect and additionally adjusted for sex in analyses of all subjects;†p-value for trend in HIV prevalence across increasing educational levels, from logistic regression model adjusted for study round, age, marital status (and the interaction term or the sex when applicable), and taking into account the cluster effect (using educational level as a continuous variable);*completed or not;**at least some level of secondary education.