Fig. 4
From: Study on predictive models for swallowing risk in patients with AECOPD
Calibration diagram of prediction model. The horizontal axis of the calibration chart represents the predicted risk of swallowing, while the vertical axis represents the observed actual risk of swallowing, both ranging from 0 to 1. The red line on the diagonal is the reference line, which refers to the situation where the predicted value equals the actual value. The red line is a curve fitting line, and the gray areas on both sides are 95% CI; CI = confidence interval