Vitamin D Status and Site-Specific Fracture Pattern Associations in Older Adults with Fragility Fractures: A Cross-Sectional Analysis of 2543 Patients

Why It Matters

Vitamin D deficiency is a modifiable risk factor that contributes to the high morbidity and mortality of hip and multiple‑site fragility fractures, so early detection can inform prevention strategies and reduce healthcare costs.

Key Takeaways

• Vitamin D deficiency affects 36% of elderly fracture patients.
• Deficiency odds rise with age, female sex, winter, cerebral infarction.
• Hip and multiple‑site fractures show the lowest 25(OH)D levels.
• Vertebral fractures have the highest median vitamin D concentrations.
• Targeted vitamin D screening could reduce hip fracture risk.

Pulse Analysis

Osteoporosis and its resulting fragility fractures impose a growing burden on aging societies, especially as life expectancy rises. Vitamin D, essential for calcium absorption and muscle function, has long been recognized as a key determinant of bone health. Yet, population‑level data on how vitamin D status differs across specific fracture types remain scarce, limiting clinicians’ ability to tailor preventive measures.

In a cross‑sectional study of 2,543 Chinese patients aged 60 and above, more than three‑quarters exhibited suboptimal vitamin D levels, with 35.9% classified as deficient. Multivariate analysis identified age, female gender, winter season, and a history of cerebral infarction as independent predictors of deficiency. Notably, serum 25(OH)D concentrations were lowest in hip and multiple‑site fractures—injuries associated with the highest mortality—and highest in vertebral fractures, suggesting distinct pathophysiological pathways where neuromuscular impairment may drive hip injuries while chronic bone loss predominates in vertebral events.

These insights underscore the clinical value of routine vitamin D screening in older adults presenting with fragility fractures, particularly those with hip involvement. Targeted supplementation could mitigate fall risk and improve bone remodeling, potentially lowering hospitalization costs and post‑fracture mortality. However, the cross‑sectional design cannot establish causality; prospective trials are needed to determine whether correcting deficiency translates into site‑specific fracture reduction. Policymakers and health systems should consider integrating vitamin D assessment into standard geriatric fracture protocols to address this modifiable risk factor.