Fig. 4
From: Dysregulation of iron homeostasis in airways associated with persistent preschool wheezing
Calibration plot of final model for predicting persistent wheezing. All children with recurrent wheezing were grouped into quartiles according to their predicted probabilities. Average predicted probability for persistent wheezing among recurrent wheezers within each quartile was plotted against actual observed prevalence of persistent wheezing in that group. Red dashed line represents perfect calibration