Model uncertainty in relative district risk ranking. Prediction interval from 6/2013 through 11/2013. 1,000 posterior samples of model parameters were used to generate 1,000 risk scores and 1,000 ranks for each district. (A), Distribution of posterior district ranks by district. Probability of district rank being in the top 100 (B) and in the top 200 (C). Estimates ordered by district rank at posterior mean of parameters.