Fig. 3
Impact of anticipated heterogeneity in measurement of the predictor body mass index on measures of predictive performance at implementation of a model to predict the 6-year risk of developing diabetes type 2. The dotted line indicates predictive performance under predictor measurement homogeneity. Dark grey indicates the impact within the range of specified predictor measurement heterogeneity and light grey indicates the range of 95% CIs from 500 bootstrap resamples. Random predictor measurement heterogeneity is presented on the x-axis, and performance measures are marginalized over scenarios of additive and multiplicative systematic predictor measurement heterogeneity