ArticleEndocrinology and metabolism (Seoul, Korea)2025
Low Serum 25-Hydroxyvitamin D as a Risk Factor for Frailty in Community-Dwelling Older Men: A Korean Nationwide Study.
Article in Endocrinology and metabolism (Seoul, Korea), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgruoundDespite the critical role of vitamin D in various biological processes, its impact on frailty-a condition closely linked to biological age-remains inconclusive. This study aimed to explore the association between serum 25-hydroxyvitamin D (25[OH] D) levels and frailty status in older Korean adults, utilizing a comprehensive frailty index (FI) and a nationally representative dataset.
methodsThis cross-sectional study included 6,589 participants aged ≥65 years from the Korea National Health and Nutrition Examination Survey (2008-2012). Frailty was assessed using a deficit accumulation FI based on 38 physical, cognitive, psychological, and social items.
resultsAfter adjusting for potential confounders, frail men showed 6.8% lower serum 25(OH)D concentrations compared to nonfrail controls (P=0.007). Men in the lowest serum 25(OH)D quartile (≤39.3 nmol/L) exhibited a 5.3% higher FI (P=0.047) and 1.71-fold increased odds of frailty (P=0.005), compared to those in the highest quartile (>63.3 nmol/L). Similarly, men with vitamin D deficiency (<30 nmol/L) exhibited a 9.6% higher FI compared to those with sufficient vitamin D levels (≥50 nmol/L; P=0.004). However, no significant association between serum 25(OH)D concentration and frailty was observed in women across any analysis.
conclusionThese findings suggest that low serum 25(OH)D concentrations are a potential risk factor for frailty, particularly in men. Further research is warranted to determine whether vitamin D supplementation in such high-risk older adults could help mitigate frailty.
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