Establishment and Validation of a Predictive Model for Radiation-Associated Aspiration Pneumonia in Patients with Radiation-Induced Dysphagia after Nasopharyngeal Carcinoma

Figure 2

Calibration curves of the nomogram. The observed PFS is shown compared with the nomogram at (a) 1 year and (b) 3 years in the training cohort, at (c) 1 year and (d) 3 years in the internal validation cohort, and at (e) 1 year and (f) 3 years in the external validation cohort. The calibration curves depict the calibration of the nomogram in terms of the agreement between the predicted risk of RAP and the observed RAP outcomes. The 45-degree gray line represents a perfect prediction, and the yellow solid lines represent the predictive performance of the nomogram. The distance between the yellow solid line and the ideal line represents the superior predictive accuracy of the nomogram. Abbreviations: PFS: pneumonia-free survival; RAP: radiation-associated aspiration pneumonia.

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