Accepted for Publication: March 12, 2013.
Published Online: June 10, 2013. doi:10.1001/jamainternmed.2013.6536.
Study concept and design: Giovannucci, Willett, and Chan.
Acquisition of data: Richman, Kenfield, and Willett.
Analysis and interpretation of data: All authors.
Drafting of the manuscript: Richman.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Richman, Chavarro, and Willett.
Obtained funding: Stampfer, Giovannucci, and Willett.
Administrative, technical, or material support: Kenfield and Chan.
Supervision: Stampfer, Willett, and Chan.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grants CA141298, CA112355, CA055075, CA133891, and CA098566 from the National Institutes of Health, grant W81XWH-11-1-0529 from the Department of Defense, and the Prostate Cancer Foundation.
Previous Presentation: This study was presented in part as a poster at the Prostate Cancer Foundation Retreat; October 25-26, 2012; Carlsbad, California.
Additional Contributions: We thank the participants and staff of the Health Professionals Follow-up Study and the following state cancer registries for their invaluable contributions to this project: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Nebraska, New Hampshire, New Jersey, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Virginia, Washington, and Wyoming. We also thank the Prostate Cancer Foundation for their contribution to the original efforts to collect data from men with prostate cancer in the Health Professionals Follow-up Study.