title: The relationship of dietary patterns with adult lung function and COPD.
abstract: Previous studies of diet and lung function have focused on associations with individual nutrients and foods, and not dietary patterns. The relationships between dietary patterns and lung function and spirometrically defined chronic obstructive pulmonary disease (COPD) were investigated in 1,551 males and 1,391 females in Hertfordshire, UK. Dietary information was obtained by food frequency questionnaire and dietary patterns were identified using principal components analysis. Using regression analysis, after controlling for confounders, a "prudent" pattern (high consumption of fruit, vegetables, oily fish and wholemeal cereals) was positively associated with forced expiratory volume in 1 s (FEV(1)) (trend p-value <0.001 in males, 0.008 in females) (difference in FEV(1) between top and bottom quintiles of pattern score, 0.18 L (95% CI 0.08-0.28 L) in males, 0.08 L (95% CI 0.00-0.16 L) in females). This pattern was also positively associated with forced vital capacity (FVC) in both sexes. Males with a higher "prudent" pattern score had a higher FEV(1)/FVC (trend p-value 0.002) and a lower prevalence of COPD (odds ratio comparing top versus bottom quintile 0.46, 95% CI 0.26-0.81; trend p-value 0.012). Associations in males were stronger in smokers than nonsmokers (interaction p-value for FEV(1)/FVC 0.002). A "prudent" dietary pattern may protect against impaired lung function and COPD, especially in male smokers.
authors.affiliation: Respiratory Epidemiology and Public Health Group, National Heart and Lung Institute, Imperial College London, London, UK. s.shaheen@qmul.ac.uk
authors.forename: S O
authors.initials: SO
authors.lastname: Shaheen
authors.forename: K A
authors.initials: KA
authors.lastname: Jameson
authors.forename: H E
authors.initials: HE
authors.lastname: Syddall
authors.forename: A
authors.initials: A
authors.lastname: Aihie Sayer
authors.forename: E M
authors.initials: EM
authors.lastname: Dennison
authors.forename: C
authors.initials: C
authors.lastname: Cooper
authors.forename: S M
authors.initials: SM
authors.lastname: Robinson
mesh_terms: D000328:Adult; D000368:Aged; D004032:Diet; D005260:Female; D006801:Humans; D008168:Lung / Q000473:pathology*; D008171:Lung Diseases / Q000209:etiology; D008297:Male; D008875:Middle Aged; D018384:Oxidative Stress; D025341:Principal Component Analysis; D029424:Pulmonary Disease, Chronic Obstructive / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology*; D012907:Smoking; D013147:Spirometry / Q000379:methods; D011795:Surveys and Questionnaires