Fig. 4From: Diagnosis of pulmonary nodules by DNA methylation analysis in bronchoalveolar lavage fluidsPerformance of the optimal model in BALF on different pathology stage. The boxplots of a, b demonstrate the performance of the model in BALF on different pathology stage in the test set and the validation set, respectively. Stars represent the difference of cancer score between different cancer stages tumors and benign diseases; “**”, p value < 0.01Back to article page