The association between diet quality and chronic obstructive pulmonary disease: a case-control study

Area of Science:

• Pulmonary Medicine
• Nutritional Science
• Epidemiology

Background:

• Limited research exists on the association between diet quality, specifically the Healthy Eating Index 2010 (HEI-2010), and chronic obstructive pulmonary disease (COPD) risk.
• Previous studies focused on general dietary patterns rather than specific diet quality indices.

Purpose of the Study:

• To investigate the association between HEI-2010 scores and COPD risk in an Iranian population.
• To determine if diet quality is a significant factor in COPD development.

Main Methods:

• A case-control study involving 84 COPD cases and 252 healthy controls.
• Dietary intake assessed using validated questionnaires and quantified with HEI-2010 scores (0-120).
• Logistic regression models used to analyze the association between HEI-2010 and COPD odds, adjusting for confounders like smoking, physical activity, and BMI.

Main Results:

• Higher HEI-2010 scores were significantly associated with lower odds of COPD (OR=0.34).
• After adjusting for confounders, individuals with the highest HEI-2010 scores had an 82% lower likelihood of COPD (OR=0.18).
• The association remained significant even after further adjustments for smoking, physical activity, and BMI (OR=0.08).

Conclusions:

• A higher quality diet, as indicated by HEI-2010, is significantly associated with reduced odds of COPD in the Iranian population.
• These findings suggest that adopting a healthy diet may be a protective factor against COPD.
• Further prospective research is recommended to confirm and elucidate this relationship.