OBJECTIVE: To investigate whether average intake of antioxidants, fruits, vegetables and fish may help to explain international differences in chronic obstructive pulmonary disease (COPD) mortality. DESIGN: Ecological analysis using information on baseline diet and the 25-year COPD mortality rate in the 16 cohorts of the Seven Countries Study. SETTING: Population-based cohorts. SUBJECTS: Men aged 40-59 years at baseline. METHODS: Dietary information was collected at baseline in small random samples of each cohort. In 1987 the reported foods were bought locally and analysed chemically. After 25 years of follow-up the underlying cause of death of those who died was established centrally. COPD mortality rate ratios were calculated, for a change equivalent to 10% of the overall mean consumption of a dietary factor. RESULTS: We observed independent inverse associations between 25-year COPD mortality and baseline consumption of fruits (rate ratio 0.49; 95% confidence interval 0.36-0.67) and fish (rate ratio, 0.97; 95% confidence interval 0.93-1.00), after adjustment for potential confounders. COPD mortality showed no statistically significant association with intake of antioxidants or vegetables. Fruit and fish consumption together explained about 67% of the variance in the COPD mortality rates of the cohorts. CONCLUSIONS: Fruit and fish consumption may partly explain population differences in COPD mortality. This is in accordance with suggestions for a relationship between fruit and fish consumption and COPD observed in studies in individuals.
OBJECTIVE: To investigate whether average intake of antioxidants, fruits, vegetables and fish may help to explain international differences in chronic obstructive pulmonary disease (COPD) mortality. DESIGN: Ecological analysis using information on baseline diet and the 25-year COPD mortality rate in the 16 cohorts of the Seven Countries Study. SETTING: Population-based cohorts. SUBJECTS:Men aged 40-59 years at baseline. METHODS: Dietary information was collected at baseline in small random samples of each cohort. In 1987 the reported foods were bought locally and analysed chemically. After 25 years of follow-up the underlying cause of death of those who died was established centrally. COPD mortality rate ratios were calculated, for a change equivalent to 10% of the overall mean consumption of a dietary factor. RESULTS: We observed independent inverse associations between 25-year COPD mortality and baseline consumption of fruits (rate ratio 0.49; 95% confidence interval 0.36-0.67) and fish (rate ratio, 0.97; 95% confidence interval 0.93-1.00), after adjustment for potential confounders. COPD mortality showed no statistically significant association with intake of antioxidants or vegetables. Fruit and fish consumption together explained about 67% of the variance in the COPD mortality rates of the cohorts. CONCLUSIONS: Fruit and fish consumption may partly explain population differences in COPD mortality. This is in accordance with suggestions for a relationship between fruit and fish consumption and COPD observed in studies in individuals.
Authors: Raphaëlle Varraso; R Graham Barr; Walter C Willett; Frank E Speizer; Carlos A Camargo Journal: Am J Clin Nutr Date: 2014-11-26 Impact factor: 7.045
Authors: Corrine Hanson; Harlan Sayles; Erica E P A Rutten; E F M Wouters; William MacNee; Peter Calverley; Jane L Meza; Stephen Rennard Journal: Chronic Obstr Pulm Dis Date: 2014-05-06