RT Journal Article SR Electronic T1 Comorbidity in chronic obstructive pulmonary disease (COPD): Data from the fourth Korean National Health and Nutrition Examination Survey (KNHANES IV) JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP P456 VO 40 IS Suppl 56 A1 Moon, Chansoo A1 Kim, Sae Byol A1 Chung, Kyung Soo A1 Park, Seon Cheol A1 Jung, Won Jai A1 Kim, Eun Young A1 Jung, Ji Ye A1 Kang, Young Ae A1 Park, Moo Suk A1 Kim, Young Sam A1 Kim, Se Kyu A1 Ahn, Chul Min A1 Chang, Joon YR 2012 UL http://erj.ersjournals.com/content/40/Suppl_56/P456.abstract AB Introduction: Many comorbidities frequently coexist with chronic obstructive pulmonary disease (COPD) and they could influence on poor prognosis. We tried to determine which comorbidities frequently coexist in individuals with COPD using population based nationwide survey.Method: We used data obtained in the first (2007) and second year (2008) of the Fourth Korean National Health and Nutrition Examination Survey (KNHANES IV) and included participants aged ≥40 years. Subjects with FEV1/FVC<0.7 was defined as individuals with COPD. Participants with history of asthma, pulmonary tuberculosis and bronchiectasis were excluded.Result: Baseline characteristics were not significantly different between COPD group (n=357) and control group (n=357) except spirometric findings. COPD group was associated with increased risk of low BMI (<18.5 Kg/m2) (OR 3.53, 95% CI 1.29-9.68; p=0.014) and associated with decreased risk of hypertension (OR 0.73, 95% CI 0.54-0.99; p=0.042) and hypercholesterolemia (OR 0.59, 95% CI 0.37-0.93; p=0.022). The incidence of low BMI uniquely increased with the severity of airflow obstruction (1.4% in control subjects, 3.6% in GOLD stage I, 4.5% in GOLD stage II and 30% in GOLD stage III+; p<0.0001). However, the incidence of hypertension and hypercholesterolemia did not.Conclusion: Incidence of low BMI uniquely increased with the severity of airflow limitation. However, more study is needed to confirm whether low BMI is the cause of COPD or the result of COPD.