Rheumatoid arthritis

Healthy dietary pattern and risk of rheumatoid arthritis: A systematic review and meta-analysis

Semin Arthritis RheumPublished Systematic review and meta-analysis of observational studies

Pooled result · Incident RA, healthy overall dietary patternResult — go to the resultOdds ratio 0.54 95 % CI 0.32–0.91

Authors' conclusion

In observational studies, healthy dietary pattern is associated with reduced risk of incident RA.

Study context

Population
Case-control and cohort studies of validated diet preceding a validated rheumatoid arthritis (RA) definition12 studies (8 independent)
Comparison
Healthy dietary pattern vs less healthy diet
Outcome
Incident RA
Methodological detailsrandom effects models, adjusted ORs, subgroup analyses, Newcastle-Ottawa Scale risk of bias, GRADE certainty assessment, Risk of bias: 3 studies low, 3 moderate, 3 high, 3 very high
  • Random effects models
  • Adjusted ORs
  • Subgroup analyses
  • Newcastle-Ottawa Scale risk of bias
  • GRADE certainty assessment
  • Risk of bias: 3 studies low, 3 moderate, 3 high, 3 very high

Pooled result

Incident RA, healthy overall dietary pattern

Odds ratio

0.54

95 % CI 0.32–0.91

Healthy dietary pattern
OR 0.54 (95 % CI 0.32–0.91)

As reported in the abstract

Further pooled results

Incident RA by dietary pattern

OR (95% CI)
Anti-inflammatoryAll showed lower point estimates for RA0.56 (0.31–0.99)
MediterraneanAll showed lower point estimates for RA0.88 (0.78–0.99)
HEIAll showed lower point estimates for RA0.60 (0.25–1.47)

Incident RA, studies with lowest risk of bias only (sensitivity analysis)

Lower RA risk, OR
0.84 (95% CI 0.76-0.94, I2=0 %)

Original publication

Healthy dietary pattern and risk of rheumatoid arthritis: A systematic review and meta-analysis. Semin Arthritis Rheum. Published 29 August 2025. doi:10.1016/j.semarthrit.2025.152825

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