Fig. 3

Calibration plots for the nomogram in both cohorts. a Training cohort. b Validation cohort. Nomogram-predicted probability and actual probability for IADL disability among participants with normal IADL at baseline were plotted in the x- and y-axis, respectively. The diagonal gray line represents an ideal plot for the calibration plot. The solid black line represents the performance of the nomogram, of which a closer match to the diagonal gray line indicates a better calibration