The association between dietary fiber intake and osteoarthritis: a cross-sectional study from the 1999–2018 U.S. National Health and Nutrition Examination Survey

Feb 27, 2025Journal of orthopaedic surgery and research

How fiber intake is linked to osteoarthritis in U.S. adults from 1999 to 2018

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Abstract

Among 30,620 participants, 5.74% were diagnosed with (OA).

  • An inverse association was observed between intake and the risk of OA, with an odds ratio of 0.99.
  • The highest quartile of dietary fiber intake was linked to a 27% lower risk of OA compared to the lowest quartile.
  • A non-linear relationship was suggested, indicating that a dietary fiber intake between 14.4 and 26.7 grams may reduce OA risk.
  • Intake levels above this range did not show significant additional protective effects against OA.
  • Further studies are needed to validate these associations.

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Key numbers

1,864 of 32,484 participants
Prevalence
Total participants included in the study
27%
Risk Reduction
Comparison of highest quartile of intake vs. lowest quartile
14.4–26.7 g
Intake Range
Threshold effect interval for intake

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