Fig. 6
Subgroup analyses: the ROC curves of the lung, mediastinum nomogram for predicting CVD of COPD patients in the external validation cohort (a: GOLD stage I-II, b: GOLD stage III-IV)
Fig. 6 | BMC Pulmonary Medicine
Subgroup analyses: the ROC curves of the lung, mediastinum nomogram for predicting CVD of COPD patients in the external validation cohort (a: GOLD stage I-II, b: GOLD stage III-IV)