"Observation Versus Initial Treatment for Men With Localized, Low-Risk Prostate Cancer: A Cost-Effectiveness Analysis"
Annals Jun 18
http://annals.org/article.aspx?articleid=1696642
"Conclusion: Among these men, observation is more effective and costs less than initial treatment, and WW is most effective and least expensive under a wide range of clinical scenarios.

Primary Funding Source: National Cancer Institute, U.S. Department of Defense, Prostate Cancer Foundation, and Institute for Clinical and Economic Review."