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Version of Record online: 17 JAN 2012
Copyright © 2011 American Cancer Society
Volume 118, Issue 18, pages 4619–4626, 15 September 2012
How to Cite
Hoppe, B. S., Nichols, R. C., Henderson, R. H., Morris, C. G., Williams, C. R., Costa, J., Marcus, R. B., Mendenhall, W. M., Li, Z. and Mendenhall, N. P. (2012), Erectile function, incontinence, and other quality of life outcomes following proton therapy for prostate cancer in men 60 years old and younger. Cancer, 118: 4619–4626. doi: 10.1002/cncr.27398
Presented at the American Society for Radiation Oncology (ASTRO) 53rd Annual Meeting; October 2-6, 2011; Miami Beach, FL.
- Issue online: 5 SEP 2012
- Version of Record online: 17 JAN 2012
- Manuscript Accepted: 16 NOV 2011
- Manuscript Revised: 20 OCT 2011
- Manuscript Received: 16 SEP 2011
- Unknown funding agency
- prostate cancer;
- proton therapy;
- radiation therapy;
This study sought to evaluate patient-reported health-related quality of life following proton therapy for prostate cancer in men ≤60 years old.
Between August 2006 and January 2010, 262 hormone-naive men ≤60 years old were treated with definitive proton therapy for prostate cancer. Before treatment and every 6 months after treatment, patients filled out the Expanded Prostate Index Composite (EPIC) and the International Index of Erectile Function (IIEF) questionnaires. Potency was defined as successful sexual intercourse in the prior month or an EPIC sexual summary (SS) score ≥60.
Median follow-up was 24 months; 90% of men completed follow-up EPIC forms within the last year. For EPIC urinary, bowel, and hormone subscales, the average decline from baseline to 2 years was ≤5 points, except for bowel function (5.2 points). SS scores declined 12.6 points after 2 years. Potency rates declined by 11% from baseline at 2 years, but 94% of men were potent with a baseline IIEF > 21, body mass index < 30, and no history of diabetes. At 2 years after treatment, only 1.8% of men required a pad for urge incontinence. On multivariate analysis, factors associated with a significant decline in SS score were mean penile bulb dose ≥40 cobalt Gy equivalents (P = .012) and radiation dose ≥80 cobalt Gy equivalents (P = .017); only diabetes was significantly associated with impotence (P = .015).
Young men undergoing proton therapy for treatment of prostate cancer have excellent outcomes with respect to erectile dysfunction, urinary incontinence, and other health-related quality of life parameters during the first 2 years after treatment. Longer follow-up is needed to confirm these findings. Cancer 2012. © 2012 American Cancer Society.