Dietary and supplemental vitamin D intake and pain interference in adults with chronic spine-related pain: a cross-sectional survey study (opens in new tab)

Background/objectivesChronic spine-related pain is a leading driver of global disability, yet the role of modifiable nutritional factors in relation to functional impairment remains inadequately characterized. This study evaluated the associations between dietary vitamin D exposure ranking, vitamin D supplementation, and pain-related functional interference among adults in tertiary care settings.MethodsA multi-center cross-sectional survey was conducted at four tertiary hospitals in China, in...