Figure 5
From: Age-period cohort analysis of AIDS incidence rates in Rio de Janeiro, Brazil, 1985–2009
Adjusted rate ratios of AIDS by age, period and birth cohort 1 , Rio de Janeiro State (Brazil), 1985–2009. 1In both cases were used negative binomial models, response variable “AIDS cases” and offset “logarithm of the population”. Models A and C included explanatory variables: “age group”, “sex” and “period”. Models B and D included explanatory variables: “birth cohort”, “sex” and “period. Dotted lines represent upper and lower boundaries of the 95% confidence interval. Midpoints were used to represent five units” intervals of age, period and cohort.