Figure 1
From: Assessing discriminative ability of risk models in clustered data
Example of random effects meta-analysis of concordance probability estimates in 7 clusters. Cluster-specific estimates are in grey. Under the assumption of normally distributed cluster-specific concordance probabilities, the predictive distribution resulting from a random effects meta-analysis is in black. The mean, the mean ± one standard deviation and the 2.5 and 97.5 percentiles of the predictive distribution are plotted with vertical lines.