Fifteen-year survival outcomes following primary androgen-deprivation therapy for localized prostate cancer

Grace L. Lu-Yao, Peter C. Albertsen, Dirk F. Moore, Weichung Shih, Yong Lin, Robert S. DiPaola, Siu Long Yao

Research output: Contribution to journalArticlepeer-review

65 Scopus citations

Abstract

Importance One in 6 American men will be diagnosed as having prostate cancer during their lifetime. Although there are no data to support the use of primary androgen-deprivation therapy (ADT) for early-stage prostate cancer, primary ADT has been widely used for localized prostate cancer, especially among older patients. OBJECTIVE To determine the long-term survival impact of primary ADT in older men with localized (T1/T2) prostate cancer. Design, Setting, and Participants Thiswas a population-based cohort study of 66 717 Medicare patients 66 years or older diagnosed from 1992 through 2009 who received no definitive local therapy within 180 days of prostate cancer diagnosis. The study was conducted in predefined US geographical areas covered by the Surveillance, Epidemiology, and End Results (SEER) Program. Instrumental variable analysis was used to assess the impact of primary ADT and control for potential biases associated with unmeasured confounding variables. The instrumental variable comprised combined health services areas with various usage rates of primary ADT. The analysis compared survival outcomes in the top tertile areas with those in the bottom tertile areas. Main Outcomes and Measures Prostate cancer-specific survival and overall survival. Results With a median follow-up of 110 months, primary ADT was not associated with improved 15-year overall or prostate cancer-specific survival following the diagnosis of localized prostate cancer. Among patients with moderately differentiated cancers, the 15-year overall survival was 20.0%in areas with high primary ADT use vs 20.8%in areas with low use (difference: 95%CI, -2.2%to 0.4%), and the 15-year prostate cancer survival was 90.6%in both high- and low-use areas (difference: 95%CI, -1.1%to 1.2%). Among patients with poorly differentiated cancers, the 15-year cancer-specific survival was 78.6%in high-use areas vs 78.5%, in low-use areas (difference: 95%CI, -1.8%to 2.4%), and the 15-year overall survival was 8.6%in high-use areas vs 9.2%in low-use areas (difference: 95%CI, -1.5%to 0.4%). Conclusions and Relevance Primary ADT is not associated with improved long-term overall or disease-specific survival for men with localized prostate cancer. Primary ADT should be used only to palliate symptoms of disease or prevent imminent symptoms associated with disease progression.

Original languageEnglish
Pages (from-to)1460-1467
Number of pages8
JournalJAMA Internal Medicine
Volume174
Issue number9
DOIs
StatePublished - Sep 1 2014

Bibliographical note

Publisher Copyright:
© 2014 American Medical Association. All rights reserved.

ASJC Scopus subject areas

  • Internal Medicine

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