Tumor size and postoperative kidney function following radical nephrectomy.
Robert J Ellis1,2,3,4, Victoria M White5,6, Damien M Bolton7,8
1Department of Population Health, QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia.
Clinical Epidemiology
|June 14, 2019
Summary
Larger kidney tumors do not protect against chronic kidney disease (CKD) after nephrectomy. Age is a significant factor, with older patients facing increased CKD risk regardless of tumor size.
Area of Science:
- Nephrology
- Urologic Oncology
- Surgical Outcomes
Background:
- Chronic kidney disease (CKD) is a common complication after nephrectomy for kidney tumors.
- Conflicting reports exist regarding tumor size's impact on postoperative kidney function.
Purpose of the Study:
- To resolve discrepancies in the literature concerning tumor size as a prognostic factor for postoperative kidney function.
- To investigate the influence of patient and tumor characteristics on kidney function post-nephrectomy.
Main Methods:
- Analysis of data from 944 kidney cancer patients and 242 living kidney donors.
- Utilized multivariable logistic regression for CKD upstaging assessment.
- Employed structural equation modeling to explore causal relationships.
Main Results:
- A significant interaction between age and tumor size was identified (P=0.03).
- Patients aged 65 years and older had an increased risk of CKD upstaging, irrespective of tumor size.
- CKD upstaging risk was similar between kidney donors and cancer patients when age-matched.
Conclusions:
- Large tumor size does not appear to offer a protective effect on postoperative kidney function.
- Inconsistencies in prior research likely stem from analytical methods and selection bias.
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