Stanley A Yap1, Antonio Finelli2,3, David R Urbach4,3, George A Tomlinson4, Shabbir M H Alibhai4,5. 1. Department of Urology, University of California Davis, Sacramento, CA, USA. 2. Division of Urologic Oncology, Princess Margaret Hospital, Toronto, ON, Canada. 3. Department of Surgery, University of Toronto, Toronto, ON, Canada. 4. Institute of Health Policy, Management, University of Toronto, Toronto, ON, Canada. 5. Department of Medicine, University of Toronto, Toronto, ON, Canada.
Abstract
OBJECTIVE: To assess whether radical nephrectomy (RN) compared with partial nephrectomy (PN) for the treatment of renal cell carcinoma (RCC) is associated with greater risk of end-stage renal disease (ESRD). PATIENTS AND METHODS: We performed a population-based, retrospective cohort study using linked administrative databases in the province of Ontario, Canada. We included individuals with pathologically confirmed RCC diagnosed between 1995 and 2010. Cox proportional hazards, propensity score, and competing risks models were used to assess the impact of treatment choice. The primary outcome was ESRD. Secondary outcomes included overall mortality, myocardial infarction, and new-onset chronic kidney disease (CKD). A modern cohort of patients (2003-2010) was analysed separately. RESULTS: We included 11,937 patients, of whom 2107 (18%) underwent PN. The median follow-up was 57 months. In the full cohort, type of surgery was not associated with the rate of ESRD, whereas PN was associated with a decreased likelihood of ESRD compared with RN in the modern cohort using a multivariable proportional hazards model [hazard ratio (HR) 0.44, 95% confidence interval (CI) 0.25-0.75) or propensity score modelling (HR 0.48, 95% CI 0.27-0.82). PN was also associated with a lower risk of new-onset CKD (HR 0.48, 95% CI 0.41-0.57). CONCLUSIONS: Although it is well-known that RN is associated with more CKD than PN, we provide the first direct evidence that PN is associated with less ESRD requiring renal replacement therapy than RN in a modern cohort of patients with RCC.
OBJECTIVE: To assess whether radical nephrectomy (RN) compared with partial nephrectomy (PN) for the treatment of renal cell carcinoma (RCC) is associated with greater risk of end-stage renal disease (ESRD). PATIENTS AND METHODS: We performed a population-based, retrospective cohort study using linked administrative databases in the province of Ontario, Canada. We included individuals with pathologically confirmed RCC diagnosed between 1995 and 2010. Cox proportional hazards, propensity score, and competing risks models were used to assess the impact of treatment choice. The primary outcome was ESRD. Secondary outcomes included overall mortality, myocardial infarction, and new-onset chronic kidney disease (CKD). A modern cohort of patients (2003-2010) was analysed separately. RESULTS: We included 11,937 patients, of whom 2107 (18%) underwent PN. The median follow-up was 57 months. In the full cohort, type of surgery was not associated with the rate of ESRD, whereas PN was associated with a decreased likelihood of ESRD compared with RN in the modern cohort using a multivariable proportional hazards model [hazard ratio (HR) 0.44, 95% confidence interval (CI) 0.25-0.75) or propensity score modelling (HR 0.48, 95% CI 0.27-0.82). PN was also associated with a lower risk of new-onset CKD (HR 0.48, 95% CI 0.41-0.57). CONCLUSIONS: Although it is well-known that RN is associated with more CKD than PN, we provide the first direct evidence that PN is associated with less ESRD requiring renal replacement therapy than RN in a modern cohort of patients with RCC.
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