Distribution of treatment by age and geographic region in men with low-risk, intermediate-risk, and high-risk localized prostate cancer, SEER-Medicare 2004–2005. Geographical differences in treatment were significant (p-value <0.001) within each risk group.
* The Western registries were divided into three groups based on similar odds of receiving prostate cancer active therapy vs. conservative management in unadjusted analyses. Group 1: Other West = Utah, Seattle, New Mexico, and Hawaii; Group 2:Los Angeles (LA) and San Francisco (SF); and Group 3: San Jose (SJ) and Greater California (CA)