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Fracture risk following bilateral oophorectomy
L J Melton1, C S Crowson, G D Malkasian
1Department of Health Sciences Research, Mayo Clinic, Rochester, Minnesota 55905, USA.
Journal of Clinical Epidemiology
|October 1, 1996
Summary
Bilateral oophorectomy may modestly increase fracture risk, particularly for distal forearm and vertebral fractures. Early estrogen deficiency may heighten this risk, though estrogen replacement therapy complicates findings.
Area of Science:
- Reproductive Medicine
- Bone Health
- Epidemiology
Background:
- Bilateral oophorectomy, the surgical removal of both ovaries, leads to immediate estrogen deficiency.
- The long-term impact of this induced estrogen deficiency on fracture risk is not fully understood.
- Assessing fracture risk post-oophorectomy is crucial for women's long-term health management.
Purpose of the Study:
- To evaluate the association between bilateral oophorectomy and subsequent fracture risk.
- To identify specific fracture types most affected by this surgical intervention.
- To explore the influence of age at estrogen deficiency onset on fracture risk.
Main Methods:
- Population-based retrospective cohort study.
- Inclusion of 463 women undergoing bilateral oophorectomy for benign ovarian conditions (1950-1979).
- Analysis of fracture incidence over 7220 person-years of follow-up.
Main Results:
- A modest increase in distal forearm fracture risk (SMR 1.4) and vertebral fracture risk (SMR 1.9) was observed.
- No significant increase in hip fracture risk was detected (SMR 1.1).
- A potential association between early-onset estrogen deficiency and increased fracture risk was suggested, confounded by estrogen replacement therapy.
Conclusions:
- Bilateral oophorectomy may be associated with an increased risk of certain fractures, notably distal forearm and vertebral fractures.
- The study highlights the complexity of assessing fracture risk, considering factors like age at estrogen deficiency and hormone replacement therapy.
- Further research with larger cohorts is needed to confirm these findings and elucidate the role of estrogen deficiency in fracture development.
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