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On-and-off Approach To Prostate Cancer Treatment May Compromise Survival

Survival among the two groups showed a 10 percent relative increase in the risk of death with intermittent therapy, with average survival of 5.8 years for the continuous group and 5.1 years for the intermittent group from the time of randomization.

Further, the researchers looked at quality of life between the two groups of patients. Initially the intermittent therapy group showed significant improvement in impotence and emotional function in the first three months and had improved trends in other aspects of quality of life compared to the continuous group. But these differences leveled off over time. 

"The improvements in some aspects of quality of life that were observed early were not sustained after a few months as patients had to resume therapy," says Hussain professor of internal medicine and urology at the U-M Medical School.

"If a patient is coming in with newly metastatic prostate cancer, hormone treatment continuously is the standard. If they wish to do intermittent treatment, they should be counseled that based on this data, their outcome might be compromised," she adds.

Follow-up studies are investigating a new generation of anti-hormone treatments combined with current therapies in the hopes of increasing the treatment's effectiveness. For information about currently available clinical trials at U-M, call the Cancer AnswerLine at 800-865-1125.

Prostate cancer statistics: 238,590 Americans will be diagnosed with prostate cancer this year and 29,720 will die from the disease, according to the American Cancer Society

Additional authors: Catherine M. Tangen, Dr.P.H., SWOG Statistical Center; Donna L. Berry, Ph.D., R.N., Dana-Farber Cancer Institute; Celestia S. Higano, M.D., University of Washington; E. David Crawford, M.D., University of Colorado Health Science Center; Glenn Liu, M.D., and George Wilding, M.D., University of Wisconsin Carbone Cancer Center; Stephen Prescott, M.D., St. James's University Hospital (UK); Subramanian Kanaga Sundaram, M.D., The Mid Yorkshire Hospitals-Pinderfields Hospital (UK); Eric Jay Small, M.D., University of California, San Francisco; Nancy Ann Dawson, M.D., Georgetown University Hospital Lombardi Comprehensive Cancer Center; Bryan J. Donnelly, M.D., Prostate Cancer Centre ( Canada); Peter M. Venner, M.D., Cross Cancer Institute ( Canada); Ulka N. Vaishampayan, M.D., Karmanos Cancer Institute; Paul F. Schellhammer, M.D., Urology of Virginia; David I. Quinn, M.D., Ph.D., University of Southern California Norris Comprehensive Cancer Center; Derek Raghavan, M.D., Ph.D., Levine Cancer Institutes; Benjamin Ely, M.S., SWOG Statistical Center; Carol M. Moinpour, Ph.D., Fred Hutchinson Cancer Research Center; Nicholas J. Vogelzang, M.D., US Oncology Research, LLC, McKesson Specialty Health, Comprehensive Cancer Centers of Nevada; Ian M. Thompson Jr., M.D., University of Texas Health Science Center

Funding: National Cancer Institute grants CA32102, CA38926, CA14028, CA55582, CA42777, CA35192, CA46441, CA46282, CA27057, CA128567, CA45807, CA20319, CA58416, CA46113, CA04919, CA76132, CA58861, CA58686, CA68183, CA12644, CA35261, CA35431, CA46368, CA22433, CA63848, CA67575, CA76447, CA67663, CA46136, CA86780, CA35281, CA63844, CA45560, CA37981, CA11083, CA35178, CA95860, CA35176, CA21115, CA31949, CA77202, CCSRI 015469; Astra Zeneca; Fonds Cancer (FOCA) from Belgium

Disclosure: None

Reference: New England Journal of Medicine, Vol. 368, No. 14, April 4, 2013

Resources:U-M Cancer AnswerLine, 800-865-1125U-M Comprehensive Cancer Center, www.mcancer.org Clinical trials at U-M, www.UMClinicalStudies.org/cancer

SOURCE University of Michigan Comprehensive Cancer Center

Copyright 2011 PR Newswire. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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