Abstract
Background: To elucidate whether dietary habits affect knee osteoarthritis, we analyzed data from past regional screening programs for arthritis and osteoporosis. Methods: Subjects comprised 493 Japanese individuals (120 men, 373 women; age range, 40-83 years) who participated in a regional screening program for arthritis and osteoporosis in a single town in southwestern Japan. Outcome measure was radiographically determined knee osteoarthritis, categorized according to the criteria of Kellgren and Lawrence as grade ≥ 2, 1 or 0. Associations between dietary habits and knee osteoarthritis were assessed by calculating odds ratios and 95% confidence intervals using a proportional odds model in logistic regression. Results: Odds ratio for knee osteoarthritis was decreased with daily coffee consumption at 40 years of age (odds ratio=0.48, 95% confidence interval=0.28-0.83). Female sex (odds ratio=2.19, 95% confidence interval=1.15-4.15), age (3rd vs. 1st tertile: odds ratio=14.9, 95% confidence interval=8.07-27.5), weight at 40 years of age (3rd vs. 1st tertile: odds ratio=2.50, 95% confidence interval=1.41-4.43), previous knee injury (odds ratio=2.01, 95% confidence interval=1.24-3.24), and physical worker (odds ratio=2.09, 95% confidence interval=1.41-3.11) were significantly associated with knee osteoarthritis. Conclusions: Daily coffee consumption at 40 years of age was inversely associated with severe radiographic knee osteoarthritis.
Highlights
Knee osteoarthritis (OA) is a common cause of pain and disability, which substantially limits the performance of various activities of daily living
Since the incidence of knee OA is expected to rise in accordance with the growth of the elderly population, the World Health Organization has suggested an urgent need for strategies to prevent OA [1]
We sought to elucidate whether dietary habits have an impact on knee OA, by analyzing data from past regional screening programs for arthritis and osteoporosis
Summary
Knee osteoarthritis (OA) is a common cause of pain and disability, which substantially limits the performance of various activities of daily living. Dietary factors that play protective and anti-progressive roles in OA might prove useful for primary or secondary prevention. We sought to elucidate whether dietary habits have an impact on knee OA, by analyzing data from past regional screening programs for arthritis and osteoporosis. To elucidate whether dietary habits affect knee osteoarthritis, we analyzed data from past regional screening programs for arthritis and osteoporosis
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