The coverage probability results are only shown for the autoregressive covariance structures as the results were similar among the three types of correlation. Coverage probabilities were similar between β1 and the intercept (β0) therefore, figures are only shown for the β1 regression coefficient. A composite figure is used for outcome prevalence values of 5% through 50% under a .005 correlation. A single graph is dedicated to the 1% prevalence level to highlight the differences that occur under these extreme conditions. When the correlation increases to .05, a composite figure is again used to display prevalence values of 10%, 30%, and 50%. Coverage probabilities are displayed in Figures 1 through 3 for the autoregressive covariance structure.
