The Effect of Dietary Fiber and Nutrients Intake on the Lung Function and COPD in Korean Adults

Background: Dietary intake is a potential risk factor in chronic obstructive pulmonary disease (COPD). This study aimed to evaluate the associations between dietary fiber and nutrients intake on lung function and COPD risk. Methods: In 2012, participants undertook the dietary assessment and spirometry, which were repeated 5 years later, and were retrospectively collected in the health screening center, Asan Medical Center, Korea. Dietary intake was directly obtained with food frequency questionnaires (FFQ) by trained diet dietitians and they were compared with baseline and 5-year follow-up. FEV1 and FVC were measured by spirometry, and the pre-bronchodilator FEV1 /FVC ratio Results: A total of 1745 subjects with baseline (2012) and 5-year follow-up were included. In baseline, 1439 subjects (517 male and 922 female) had normal spirometry and in re-spirometry 5 years later, 48 (3.3%) COPD patients were newly detected among them. In the COPD group, 41 (85.4%) patients were male, and 11 (22.9%) patients were current smokers. The mean dietary fiber intake of the COPD group was significantly lower than that of the baseline (6.14 vs. 8.45 g/day, p Method: Our study indicates that the high intake of dietary fiber is inversely associated with COPD risk.