The Relationship Between The Body Mass Index Of Chronic Obstructive Pulmonary Disease And Pulmonary Function

Objective: To explore the association between the body mass index of chronicobstructive pulmonary disease and pulmonary function.Methods: From January2011and December2012,we collected111cases clinic ofCOPD patients with stable in our hospital,and divided into low weightgroup(BMI<18.5kg/m2),normal body weight group(18.5kg/m2≤BMI<23.9kg/m2)andhigh weight group(BMI≥23.9kg/m2);the incidence of the pulmonary functioncompared between the three groups,then analyzed the correlation between BMI andpulmonary function.Results:Correlation analysis demonstrated that BMI was strongly correlated withforced vital capacity (FVC)(r=0.196,P<0.05）,forced expiratory volume in on second（FEV1%）(r=0.295, P <0.01),FEV1/FVC (r=0.505, P <0.01) and maximalmid-expiratory flow curve (MMEF)(r=0.264,P <0.01);The incidence of dyspnea ofpatients with low body weight was higher than that of the patients with normal bodyweight and the high weight, the re was statistical difference between the three groups(P <0.01).Comparing with the three groups,FVC,FEV1%,FEV1/FVC,MMEFsignificantly changed in the low weight group (P <0.01); there were no significantdifference between the normal group and the high weight group (P>0.05).Conclusion:There is a correlation between BMI and FVC, FEV1%,FEV1/FVC,MMEFin patients with chronic obstructive pulmonary. The impact of BMI on FEV1/FVC ismost significant in all the function indexes that on. There were some correlationsbetween BMI and dyspnea of COPD patients.FVC, FEV1%,FEV1/FVC,MMEF in thelow weight patients with COPD were lower than the other groups,but these four indexes were no difference between the high group and the normal weight group.improvement of the nutrition o f the COPD patients was of benefit to improve thepulmonary function, dyspnea and the quality of life.