Association of dietary magnesium intake with radiographic knee osteoarthritis: results from a population-based study

Qin B, Shi X, Samai PS, Renner JB, Jordan JM, He K · Arthritis Care & Research (Hoboken)

The first population-based analysis to put dietary magnesium against radiographic knee osteoarthritis, and it found an inverse association with radiographic features — with the relationship differing by race, which later studies also report and none explains.

Population

Participants in the population-based Johnston County Osteoarthritis Project

Intervention

Higher dietary magnesium intake

Comparator

Lower intake

Limitations

Cross-sectional within a population cohort, diet by food-frequency questionnaire, and magnesium intake tracks closely with wholegrain, nut and vegetable intake — so it is a marker of dietary pattern as much as of a mineral.