Research Article: Nomograms Using CT Morphological Features and Clinical Characteristics to Identify COPD in Patients with Lung Cancer: A Multicenter Study
Introduction:
Chronic obstructive pulmonary disease (COPD) is the third leading cause of death in the world. The Global Burden of Disease Study estimated the global prevalence of COPD to be million cases in . In the same year, the overall prevalence of spirometry-defined COPD was .%, accounting for . million people with COPD in China. Lung cancers are the second most common malignant tumors and have the highest mortality rate among malignancies. , In , there were . million new cases of lung cancer worldwide, and lung cancer…
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