Development and Validation of a Prediction Pneumothorax Model in CT-Guided Transthoracic Needle Biopsy for Solitary Pulmonary Nodule

Figure 3

Nomogram for prediction of post-CT-TNB pneumothorax risk and its predictive performance. First of all, find point for each predictor (variable) of a patient on the uppermost rule; then add all points together and calculate the “total points”; finally find the corresponding predicted probability of pneumothorax on the lowest rule. Codes annotation: diagnosis, 0: benign, 1: malignant; puncture position, 0: supine, 1: prone, 2: lateral position. CT-TNB, computed tomography-guided percutaneous transthoracic needle biopsy.