Figure 1.

Model-based estimates of unadjusted state-level probabilities and 95% confidence intervals of patients who had received nephrologist care at least 12 months before ESRD for all states. The probability estimates were obtained from the null model without covariates (model 1). The horizontal lines represent the 95% confidence intervals. The estimated average state-level probability is indicated by the solid vertical line. The estimated interval range of state-level probabilities for 90% of states is indicated by the left and right dotted lines. The 10 geographic regions were based on the nine US census divisions (50) with two pre hoc modifications to group neighboring states in the same region: Delaware, Maryland, and the District of Columbia were moved from the South Atlantic to the Middle Atlantic region, and a new Southwest Pacific region that consisted of Nevada, California, and Arizona was formed.