Abstract: Objective  To explore the correlation between nutritional status and longterm mortality of inpatients with chronic obstructive pulmonary disease(COPD). Methods  From January 2015 to July 2016, 82 patients with COPD were admitted to our hospital.  The clinical data of patients were collected by retrospective analysis. The patients were divided into normal nutrition group (49 cases) and malnutrition group (33 cases) according to the level of BMI.The nutritional status, pulmonary function, hospital stay and longterm mortality of  two groups were compared. Spearman correlation analysis was used to explore the relationship between the nutritional status of patients and the longterm mortality. Results  The levels of serum albumin（ALB）, prealbumin（PAB）and blood lymphocyte count（TCL） in malnutrition group were significantly lower than those in normal nutrition group（P<0.05）. The levels of peak expiratory flow（PEF）, forced expiratory volume in 1st second（FEV1）and FEV1/FVC in malnutrition group were significantly lower than those in normal nutrition group（P<0.05）. The length of hospital stay and longterm mortality of patients in malnutrition group were significantly higher than those in normal nutrition group（P<0.05）. Spearman correlation analysis showed that BMI was positively correlated with PEF, FEV1 and FEV1 / FVC of lung function（P<0.05）, and BMI was negatively correlated with longterm mortality（P<0.05）. Conclusion  The nutritional status of COPD patients is closely related to the improvement of pulmonary function and the good recovery of prognosis. The longterm mortality of malnourished patients increases.

Key words: pulmonary disease, chronic obstructive, mortality, nutritional survey