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Gender differences in fracture risk and bone mineral density
S Kudlacek1, B Schneider, H Resch
1KH Barmherzige Brüder, Medizinische Abteilung, Grosse Mohrengasse 9 A-1020, Vienna, Austria. ambulanz.osteoporose@bbwien.at
Maturitas
|November 7, 2000
Summary
Men experience vertebral fractures at higher bone density levels than women. This study highlights that reduced bone mineral density increases spine fracture risk in both sexes.
Area of Science:
- Orthopedics
- Gerontology
- Radiology
Background:
- Bone mineral density (BMD) and fracture thresholds vary between sexes.
- Osteoporosis significantly impacts aging populations worldwide.
- Understanding gender-specific fracture risk is crucial for prevention.
Purpose of the Study:
- To investigate gender-related differences in bone mineral density and fracture threshold.
- To compare vertebral fracture prevalence and risk factors between men and women.
- To determine if sex influences fracture risk independently of age and BMD.
Main Methods:
- Quantitative computed tomography (QCT) assessed BMD in 136 males and 337 females.
- Spine fractures were evaluated in non-fractured vertebral bodies (L1-L5).
- Logistic regression analysis compared fracture risk after matching for age and BMD.
Main Results:
- Females with fractures were older and had lower BMD than non-fracture females.
- Males with fractures were older and had significantly reduced spinal BMD.
- Men exhibited a significantly higher prevalence of vertebral fractures.
- Men sustained fractures at a higher BMD level (120 mg/cm³) compared to women (105 mg/cm³).
- Sex was a significant predictor of fracture risk (Odds Ratio 3.1), indicating a higher risk in women.
Conclusions:
- Decreased bone mineral density is a primary cause of spine fractures in both genders.
- Women have a significantly higher risk of vertebral fractures compared to men at equivalent bone density levels.
- Further research into sex-specific fracture mechanisms is warranted.