Fig. 6

DCA curves of nomogram for predicting the probability of SI in training set (A) and validation set (B). The horizontal and vertical axes represent the threshold probability and net benefit, respectively. The lines between the horizontal axis and vertical axis display the benefit of different predictive variables. The DCA curves show that if the threshold probability is 3–84%, using this nomogram in the current study to predict SI risk could add more benefit. DCA: Decision curve analysis; SI: Suicidal ideation