Abstract |
We found that community-dwelling women with 25-hydroxyvitamin D levels <20 ng/mL compared to levels ≥20 ng/mL indicated increased risks for clinical, non-vertebral, and fragility fractures during 5 years. Furthermore, the increased risks of non-vertebral fractures remained significant in 10 and 15 years after adjusting for age and bone mineral density. INTRODUCTION: We examined whether total 25-hydroxyvitamin D (25[ OH]D) levels are associated with fracture risk over 15 years in a Japanese female cohort. METHODS: Of 1437 community-dwelling women aged ≥50 years in the baseline survey, 1236 provided information regarding fractures during a 15-year follow-up period. The analysis included 1211 women without early menopause or diseases affecting bone metabolism. RESULTS: Over 15 years, 269 clinical (224 non-vertebral, 149 fragility) fracture events were confirmed. Incidence rates categorized by 25( OH)D levels (<10, 10-20, 20-30, and ≥30 ng/mL) indicated a significant divergence for any clinical fractures in 5 years (log rank test p = 0.016) and for non-vertebral fractures in 5, 10, and 15 years (p < 0.001, p = 0.001, p = 0.017, respectively). Hazard ratios (HRs) for 25( OH)D levels <10 and 10-20 ng/mL compared to levels ≥30 ng/mL during 5 years indicated significances for clinical fractures (HR 4.93 with p = 0.009, HR 3.00 with p = 0.034) and for non-vertebral fractures (HR 6.55 with p = 0.005, HR 3.49 with p = 0.036). Those with levels <20 ng/mL compared to those with levels ≥20 ng/mL indicated significant increased risks for clinical fractures (HR 1.72 with p = 0.010), non-vertebral fractures (HR 2.45 with p < 0.001), and fragility fractures (HR 2.00 with p = 0.032) in 5 years. The HR of non-vertebral fractures for levels <20 ng/mL remained significant during 15 years (HR 1.42 with p = 0.012) after adjustment for age and femoral neck bone mineral density. CONCLUSIONS: Low 25( OH)D levels, especially <20 ng/mL, were associated with elevated fracture risks in Japanese women.
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Authors | J Tamaki, M Iki, Y Sato, E Kajita, H Nishino, T Akiba, T Matsumoto, S Kagamimori, JPOS Study Group |
Journal | Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA
(Osteoporos Int)
Vol. 28
Issue 6
Pg. 1903-1913
(06 2017)
ISSN: 1433-2965 [Electronic] England |
PMID | 28243705
(Publication Type: Journal Article)
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Chemical References |
- Biomarkers
- Vitamin D
- 25-hydroxyvitamin D
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Topics |
- Adolescent
- Adult
- Aged
- Biomarkers
(blood)
- Body Size
(physiology)
- Bone Density
(physiology)
- Cohort Studies
- Female
- Femur Neck
(physiopathology)
- Follow-Up Studies
- Humans
- Incidence
- Japan
(epidemiology)
- Kaplan-Meier Estimate
- Lumbar Vertebrae
(physiopathology)
- Middle Aged
- Osteoporosis, Postmenopausal
(blood, epidemiology, physiopathology)
- Osteoporotic Fractures
(blood, epidemiology, physiopathology)
- Predictive Value of Tests
- Risk Assessment
(methods)
- Vitamin D
(analogs & derivatives, blood)
- Young Adult
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