BACKGROUND: Practice guidelines for nonmuscle invasive (ie, early stage) bladder cancer are ambiguous, resulting in substantial practice variation without a clear patient benefit. OBJECTIVES: To profile urologist practice styles and empirically derive better patterns of use for common bladder cancer services. RESEARCH DESIGN: Retrospective cohort. SUBJECTS: Elderly patients diagnosed with early-stage bladder cancer between January 1, 1992 and December 31, 2005 in Surveillance, Epidemiology, and End Results-Medicare linked data. MEASURES: After identifying each patient's treating urologist, we fit multilevel models to obtain reliability-adjusted measures of the urologist's use of surveillance-associated (cytoscopy and urine cytology) and treatment-associated (intravesical therapy) services during the 2 years after diagnosis. We then used the Cox proportional hazards regression to evaluate the association between a patient's risk of bladder cancer death and his urologist's frequency of service use. RESULTS: Regardless of disease severity, no measurable patient benefit was associated with care delivery by a urologist residing in the highest quartile for cystoscopy or intravescial therapy use. However, maximal intensity of cytology use was associated with a lower risk of bladder cancer death for patients with high-grade stage Ta/Tis (highest vs. lowest intensity quartiles: hazard ratio, 0.73; 95% confidence interval, 0.56-0.95) and stage T1 disease (hazard ratio, 0.59; 95% confidence interval, 0.49-0.72). CONCLUSIONS: Our analysis supports a more tailored approach to patients with early-stage bladder cancer. Further, it serves as an example for applying observational data to characterize better clinical practices in the absence of experimental studies.
BACKGROUND: Practice guidelines for nonmuscle invasive (ie, early stage) bladder cancer are ambiguous, resulting in substantial practice variation without a clear patient benefit. OBJECTIVES: To profile urologist practice styles and empirically derive better patterns of use for common bladder cancer services. RESEARCH DESIGN: Retrospective cohort. SUBJECTS: Elderly patients diagnosed with early-stage bladder cancer between January 1, 1992 and December 31, 2005 in Surveillance, Epidemiology, and End Results-Medicare linked data. MEASURES: After identifying each patient's treating urologist, we fit multilevel models to obtain reliability-adjusted measures of the urologist's use of surveillance-associated (cytoscopy and urine cytology) and treatment-associated (intravesical therapy) services during the 2 years after diagnosis. We then used the Cox proportional hazards regression to evaluate the association between a patient's risk of bladder cancer death and his urologist's frequency of service use. RESULTS:Regardless of disease severity, no measurable patient benefit was associated with care delivery by a urologist residing in the highest quartile for cystoscopy or intravescial therapy use. However, maximal intensity of cytology use was associated with a lower risk of bladder cancer death for patients with high-grade stage Ta/Tis (highest vs. lowest intensity quartiles: hazard ratio, 0.73; 95% confidence interval, 0.56-0.95) and stage T1 disease (hazard ratio, 0.59; 95% confidence interval, 0.49-0.72). CONCLUSIONS: Our analysis supports a more tailored approach to patients with early-stage bladder cancer. Further, it serves as an example for applying observational data to characterize better clinical practices in the absence of experimental studies.
Authors: Brock O'Neil; Amy J Graves; Daniel A Barocas; Sam S Chang; David F Penson; Matthew J Resnick Journal: J Natl Cancer Inst Date: 2015-11-18 Impact factor: 13.506
Authors: Florian R Schroeck; Kristine E Lynch; Ji Won Chang; Todd A MacKenzie; John D Seigne; Douglas J Robertson; Philip P Goodney; Brenda Sirovich Journal: JAMA Netw Open Date: 2018-09-28