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toring of the infection marker PCT can help to achieve early intervention.Objective To investigate the clinical values of nutritional status and chest CT phenotypes in the assessment of chronic obstructive pulmonary disease(COPD). Methods A total of 256 patients with stable COPD were enrolled from Peking Union Medical College Hospital and Civil Aviation General Hospital from June 2017 to June 2018.Demographic data,height,weight,smoking history,and number of exacerbations were collected.Pulmonary function tests and COPD assessment test(CAT