Pulse Brain · Growing Health Evidence Index
Tier 3 — Observational / field trialPeer-reviewed

Prevalence and Prognostic Significance of Systemic Inflammation Index and Diet Quality in Patients with Chronic Obstructive Pulmonary Disease: Evidence from the Cohort Study of NHANES 2007–2018

Yu Han; Yutao Wu; Yihao Li; Huilin Xia; Zhihao Cai; Li Qiao; Xiaomeng Zhang; Zibei Chang; Peng Huang; Jianqing Wu; Bo Chen

International Journal of Chronic Obstructive Pulmonary Disease · 2025

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Summary

This cohort study draws on NHANES data from 2007 to 2018 to investigate the relationship between systemic inflammation — quantified via the Systemic Inflammation Index — and dietary quality in patients diagnosed with COPD. The study likely demonstrates that higher inflammatory burden and poorer diet quality are independently or jointly associated with worse prognostic outcomes in this population. The use of a nationally representative US survey dataset provides reasonable generalisability across adult COPD patients, though the observational design limits causal inference.

UK applicability

The findings are not directly applicable to UK conditions, but the mechanistic associations between inflammation, dietary quality, and COPD prognosis are likely transferable given comparable disease burden and dietary patterns in the UK. UK clinicians and public health bodies may find the evidence relevant to dietary intervention strategies within COPD management frameworks.

Key measures

Systemic Inflammation Index (SII); diet quality score (likely Healthy Eating Index or similar); COPD prevalence; all-cause and/or cause-specific mortality; hazard ratios; confidence intervals

Outcomes reported

The study examined the prevalence and prognostic significance of the systemic inflammation index (SII) and diet quality scores in adults with chronic obstructive pulmonary disease (COPD), assessing associations with mortality and disease outcomes. It likely reports survival or all-cause mortality endpoints stratified by inflammation and dietary measures.

Theme
Nutrition & health
Subject
Respiratory disease & dietary inflammation
Study type
Research
Study design
Observational cohort
Source type
Peer-reviewed study
Status
Published
Geography
United States
System type
Human clinical
DOI
10.2147/copd.s536178
Catalogue ID
NRmo3f02hq-0cj

Topic tags

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