Fig. 5From: A novel model for predicting prolonged stay of patients with type-2 diabetes mellitus: a 13-year (2010–2022) multicenter retrospective case–control studyCalibration curves of the nomogram. The dotted line represents the performance of the nomogram, whereas the solid green line corrects for any bias in the nomogram. The dashed line represents the reference line where an ideal nomogram would lieBack to article page