This study examined the association between serum 25-hydroxyvitamin D concentrations [s-25(OH)D] and the risk of hip fracture in Norway using a case-cohort study.  The authors conclude that there was an increased risk of hip fracture in subjects in the lowest compared with the highest quartile of serum 25-hydroxyvitamin D and that, low vitamin D status was a modest risk factor for hip fracture.

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