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Vasectomy is associated with an increased risk for urolithiasis
R A Kronmal1, J N Krieger, V Coxon
1Department of Biostatistics, University of Washington, School of Public Health and Community Medicine, Seattle 98195, USA.
Summary
Vasectomy increases the risk of urolithiasis (kidney stones) by twofold in men younger than 46. This elevated risk for kidney stones can persist for up to 14 years after the procedure.
Area of Science:
- Urology
- Epidemiology
Background:
- Vasectomy is a common contraceptive method for healthy men.
- This demographic is also at high risk for urolithiasis (kidney stones).
Purpose of the Study:
- To evaluate vasectomy as a potential risk factor for urolithiasis.
Main Methods:
- A case-control study was conducted within a large health maintenance organization.
- Cases were men with initial urolithiasis episodes; controls were age-matched men without urolithiasis history.
- Logistic regression models were used to analyze the relative risk.
Main Results:
- Vasectomy was associated with a 1.9-fold increased risk of urolithiasis in men younger than 46.
- No significant increased risk was observed in men aged 46 or older.
- A 2.0-fold increased risk of urinary calculi was noted in men 0-4 years postvasectomy, persisting up to 14 years.
Conclusions:
- Vasectomy is linked to a significantly increased risk of urolithiasis in younger men.
- This risk may persist for over a decade, potentially causing substantial morbidity.
- Further research may be warranted to understand the underlying mechanisms.