Hospital variation in the treatment of cT1a renal cancer

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Main Authors: Cato Caroline Bresser, Paul Bastiaan van der Nat, Hilin Yildirim, Bart Jean Pieter Kersten, Hein Johannes Josephus Leenarts, Katja Karen Helmi Aben, Patricia Jeannelle Zondervan, Lea Magdalena Dijksman, Pepijn Dione Polm, Mirjam Marjolein Garvelink, Harm Hubertus Edmundus van Melick
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Published: Wiley 2026
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author Cato Caroline Bresser
Paul Bastiaan van der Nat
Hilin Yildirim
Bart Jean Pieter Kersten
Hein Johannes Josephus Leenarts
Katja Karen Helmi Aben
Patricia Jeannelle Zondervan
Lea Magdalena Dijksman
Pepijn Dione Polm
Mirjam Marjolein Garvelink
Harm Hubertus Edmundus van Melick
author_facet Cato Caroline Bresser
Paul Bastiaan van der Nat
Hilin Yildirim
Bart Jean Pieter Kersten
Hein Johannes Josephus Leenarts
Katja Karen Helmi Aben
Patricia Jeannelle Zondervan
Lea Magdalena Dijksman
Pepijn Dione Polm
Mirjam Marjolein Garvelink
Harm Hubertus Edmundus van Melick
Cato Caroline Bresser
Paul Bastiaan van der Nat
Hilin Yildirim
Bart Jean Pieter Kersten
Hein Johannes Josephus Leenarts
Katja Karen Helmi Aben
Patricia Jeannelle Zondervan
Lea Magdalena Dijksman
Pepijn Dione Polm
Mirjam Marjolein Garvelink
Harm Hubertus Edmundus van Melick
collection Wiley Open Access
contents Hospital variation in the treatment of cT1a renal cancer Cato Caroline Bresser Paul Bastiaan van der Nat Hilin Yildirim Bart Jean Pieter Kersten Hein Johannes Josephus Leenarts Katja Karen Helmi Aben Patricia Jeannelle Zondervan Lea Magdalena Dijksman Pepijn Dione Polm Mirjam Marjolein Garvelink Harm Hubertus Edmundus van Melick BJUI Compass Abstract Objectives To evaluate treatment patterns and inter‐hospital variation of cT1a renal cell carcinoma (RCC) in seven Dutch teaching hospitals. Patients and methods In this historical multicenter cohort study, adults diagnosed with cT1a renal cancer (2019–2022) were identified through the Netherlands Cancer Registry. Clinical data were extracted from electronic records. Primary outcome was initial treatment. Descriptive statistics and subgroup analyses assessed variation. Logistic regression analyses identified factors associated with active treatment. Results We included 501 patients with 544 cT1a renal cancer tumours. Mean age was 66 years, 40% were overweight (BMI 25–29.9), and 40% had severe comorbidity (CCI ≥ 5). Active treatment was initiated for 65% of tumours, ranging from 44% to 85% between hospitals ( p  < 0.001). The types of treatment modalities used differed significantly between hospitals. This variation persisted after stratifying for comorbidity and tumour complexity. Independent factors associated with active treatment were Charlson comorbidity index (CCI) (OR = 0.77 95%CI [0.72–0.83], p  < 0.001) RENAL Nephrometry score (OR = 1.16 95%CI [1.04–1.28], p  = 0.006), and hospital of diagnosis ( p  < 0.001). After adjustment for case mix, hospital of diagnosis remained a significant predictive factor ( p  < 0.001). Study limitations include potential selection bias and limited generalizability. Conclusions Substantial inter‐hospital variation exists in cT1a RCC management, which is not fully explained by patient‐ or tumour characteristics. To reduce unwarranted variation and improve care, transparent care pathways, routine outcome measurement, shared decision‐making and inter‐hospital benchmarking are needed. 10.1002/bco2.70130 http://creativecommons.org/licenses/by/4.0/
doi_str_mv 10.1002/bco2.70130
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institution Wiley Open Access
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publishDate 2026
publisher Wiley
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spellingShingle Hospital variation in the treatment of cT1a renal cancer
Cato Caroline Bresser
Paul Bastiaan van der Nat
Hilin Yildirim
Bart Jean Pieter Kersten
Hein Johannes Josephus Leenarts
Katja Karen Helmi Aben
Patricia Jeannelle Zondervan
Lea Magdalena Dijksman
Pepijn Dione Polm
Mirjam Marjolein Garvelink
Harm Hubertus Edmundus van Melick
BJUI Compass
Hospital variation in the treatment of cT1a renal cancer Cato Caroline Bresser Paul Bastiaan van der Nat Hilin Yildirim Bart Jean Pieter Kersten Hein Johannes Josephus Leenarts Katja Karen Helmi Aben Patricia Jeannelle Zondervan Lea Magdalena Dijksman Pepijn Dione Polm Mirjam Marjolein Garvelink Harm Hubertus Edmundus van Melick BJUI Compass Abstract Objectives To evaluate treatment patterns and inter‐hospital variation of cT1a renal cell carcinoma (RCC) in seven Dutch teaching hospitals. Patients and methods In this historical multicenter cohort study, adults diagnosed with cT1a renal cancer (2019–2022) were identified through the Netherlands Cancer Registry. Clinical data were extracted from electronic records. Primary outcome was initial treatment. Descriptive statistics and subgroup analyses assessed variation. Logistic regression analyses identified factors associated with active treatment. Results We included 501 patients with 544 cT1a renal cancer tumours. Mean age was 66 years, 40% were overweight (BMI 25–29.9), and 40% had severe comorbidity (CCI ≥ 5). Active treatment was initiated for 65% of tumours, ranging from 44% to 85% between hospitals ( p  < 0.001). The types of treatment modalities used differed significantly between hospitals. This variation persisted after stratifying for comorbidity and tumour complexity. Independent factors associated with active treatment were Charlson comorbidity index (CCI) (OR = 0.77 95%CI [0.72–0.83], p  < 0.001) RENAL Nephrometry score (OR = 1.16 95%CI [1.04–1.28], p  = 0.006), and hospital of diagnosis ( p  < 0.001). After adjustment for case mix, hospital of diagnosis remained a significant predictive factor ( p  < 0.001). Study limitations include potential selection bias and limited generalizability. Conclusions Substantial inter‐hospital variation exists in cT1a RCC management, which is not fully explained by patient‐ or tumour characteristics. To reduce unwarranted variation and improve care, transparent care pathways, routine outcome measurement, shared decision‐making and inter‐hospital benchmarking are needed. 10.1002/bco2.70130 http://creativecommons.org/licenses/by/4.0/
title Hospital variation in the treatment of cT1a renal cancer
topic BJUI Compass
url https://bjui-journals.onlinelibrary.wiley.com/doi/10.1002/bco2.70130