Authors: Swisher-McClure S, Pollack CE, Christodouleas JP, Guzzo TJ, Haas NB, Vapiwala N, Bekelman JE
Title: Variation in use of androgen suppression with external-beam radiotherapy for nonmetastatic prostate cancer.
Journal: Int J Radiat Oncol Biol Phys 83(1):8-15
Date: 2012 May 01
Abstract: PURPOSE: To describe practice patterns associated with androgen suppression (AS) stratified by disease risk group in patients undergoing external-beam radiotherapy (EBRT) for localized prostate cancer. METHODS AND MATERIALS: We identified 2,184 low-risk, 2,339 intermediate-risk, and 2,897 high-risk patients undergoing EBRT for nonmetastatic prostate cancer diagnosed between January 1, 2004, and December 31, 2005, in the linked Surveillance, Epidemiology, and End Results-Medicare database. We examined the association of patient, clinical, and demographic characteristics with AS use by multivariate logistic regression. RESULTS: The proportions of patients receiving AS for low-risk, intermediate-risk, and high-risk prostate cancer were 32.2%, 56.3%, and 81.5%, respectively. AS use among men in the low-risk disease category varied widely, ranging from 13.6% in Detroit to 47.8% in Kentucky. We observed a significant decline in AS use between 2004 and 2005 within all three disease risk categories. Men aged ≥75 years or with elevated comorbidity levels were more likely to receive AS. CONCLUSION: Our results identified apparent overuse and underuse of AS among men within the low-risk and high-risk disease categories, respectively. These results highlight the need for clinician and patient education regarding the appropriate use of AS. Practice patterns among intermediate-risk patients reflect the clinical heterogeneity of this population and underscore the need for better evidence to guide the treatment of these patients.