Fig. 2

ROC analysis for the nomogram of the prediction model of recipients with prolonged mechanical ventilation after lung transplantation based on all indicators and all variables. ROC curve summation of various factors, including cold ischemia time, ventilation parameters, and PGD grade at T0. The final integrated model in the figure has an area under the ROC curve of 0.895. Among the indicators, the area under ROC curve of cold ischemia time was the largest, reaching 0.789