| Title: | Associations between dietary inflammatory potential and COPD: the mediating role of inflammation |
| Journal: | Frontiers in Nutrition |
| Published: | 1 May 2026 |
| DOI: | https://doi.org/10.3389/fnut.2026.1762993 |
| URL: | http://dx.doi.org/10.3389/fnut.2026.1762993 |
Publication 17782
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Abstract
Chronic obstructive pulmonary disease (COPD) continues to pose a significant global burden, which may be exacerbated by pro-inflammatory diets. This study aimed to investigate the association between the Dietary Inflammatory Index (DII) and the Energy-adjusted Dietary Inflammatory Index (E-DII) and the risk of COPD. A total of 167,440 participants were recruited for a prospective analysis from the UK Biobank. Cox proportional hazards models were employed to analyze the associations of DII and E-DII with COPD. Restricted cubic spline (RCS) and subgroup analyses were also performed. Additionally, mediation analyses were conducted to explore the potential mediating role of inflammatory biomarkers between DII, E-DII and COPD risk. During a median follow-up of 13.4 years, 4,041 COPD cases occurred. After adjusting for covariates, each unit increase in DII and E-DII was associated with a 5% [HR: 1.05 (95% CI: 1.04-1.07)] and 20% [HR: 1.20 (95% CI: 1.16-1.25)] higher risk of COPD. Participants in the highest quartile of DII and E-DII scores had a higher risk of COPD compared to those in the lowest quartile, with HR = 1.27 (95% CI: 1.17-1.39) and HR = 1.42 (95% CI: 1.30-1.55). In mediation analyses, C-reactive protein (CRP) showed the highest proportion mediated for both DII and E-DII, followed by systemic immune-inflammation index (SII). Subgroup analyses indicated population heterogeneity, and sensitivity analyses confirmed the robustness of the findings. Both DII and E-DII are associated with an increased risk of COPD, and this association may be partially explained by systemic inflammation, particularly CRP and SII.</p>
12 Authors
- Aimin Wang
- Qingxia Cui
- Weijing Meng
- Qida He
- Guiya Guo
- Wangchen Song
- Yanxia Wang
- Xinyu Yang
- Yonghua Ma
- Na Sun
- Suzhen Wang
- Fuyan Shi
1 Application
| Application ID | Title |
|---|---|
| 78500 | Exploring the specific risk factors and key biomarkers for stroke using biochemical indicators, lifestyle, environmental factors and genetic information |
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