Development and Validation of a Prediction Pneumothorax Model in CT-Guided Transthoracic Needle Biopsy for Solitary Pulmonary Nodule
Figure 1
Predictors’ selection using the Lasso regression method. (a) A 10-fold cross-validation was used in the Lasso regression. Binomial deviance was plotted versus log (lambda). Dotted vertical lines were drawn at the optimal values by utilizing the minimum criteria (left dotted line) and the 1 standard error criterion (right dotted line). (b) Lasso coefficient profiles of the 8 variables. A coefficient profile plot was produced against the log (lambda) sequence. Dotted vertical lines were drawn at the optimal values by using the minimum criteria (left dotted line) and the 1 standard error criterion (right dotted line). In the current study, predictors were chosen according to the minimum criteria, where optimal lambda resulted in 5 nonzero coefficients.