Burden of Chlamydia in the United States: Trend Analysis of Incidence Rates

Chlamydia is the most commonly reported bacterial sexually transmitted infection in the United States, and the number of incident cases reported has nearly doubled from 2000 to 2011. One limitation of state{reported surveillance data is that there is a standard delay of 2 to 3 years. We used data from the CDC Atlas to analyze spatial and demographic trends in the reported incidence of chlamydia from 2000-2011. We estimated incidence i) nationally, ii) for each state, and iii) for each demographic group up to 2013, using separate Poisson regression models