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Cohort study
A higher overall diet quality is inversely associated with the risk of chronic obstructive pulmonary disease (COPD) in men and women
  1. Rania A Mekary
  1. Department of Nutrition, Harvard School of Public Health, MCPHS University, and Brigham and Women's Hospital, Boston, Massachusetts, USA
  1. Correspondence to : Dr Rania A Mekary, Department of Social and Administrative Sciences, MCPHS University, 179 Longwood Avenue W332, Boston, MA, 02115, USA; rania.mekary{at}

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Cigarette smoking has been identified as the major risk factor for chronic obstructive pulmonary disease (COPD); nevertheless, many patients with COPD have never smoked, which suggests the involvement of other modifiable risk factors such as diet. While some studies have revealed an inverse relationship between a prudent dietary pattern and COPD risk and a direct association between a Western dietary pattern and COPD risk in both men1 and women,2 the role of overall dietary quality as reflected by the Alternate Healthy Eating Index 2010 (AHEI-2010, a measure of overall diet quality) and COPD risk remains unknown. This study examines the association between AHEI-2010 and COPD risk among US men and women.


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  • Competing interests None declared.

  • Provenance and peer review Commissioned; internally peer reviewed.