Accepted for Publication: March 25, 2015.
Published Online: July 22, 2015. doi:10.1001/jamasurg.2015.1692.
Study concept and design: Crawford, Allan, Liem, Moneta, Landry.
Acquisition, analysis, or interpretation of data: Crawford, Allan, Patel, Hart, Schreiber, Azarbal, Mitchell, Moneta, Landry.
Drafting of the manuscript: Crawford, Allan, Patel, Landry.
Critical revision of the manuscript for important intellectual content: Crawford, Allan, Hart, Schreiber, Azarbal, Liem, Mitchell, Moneta, Landry.
Statistical analysis: Crawford, Allan, Patel, Hart, Landry.
Administrative, technical, or material support: Crawford, Moneta.
Study supervision: Azarbal, Liem, Mitchell, Moneta, Landry.
Conflict of Interest Disclosures: None reported.
Previous Presentation: This study was presented at the 86th Annual Meeting of the Pacific Coast Surgical Association; February 20, 2015; Monterey, California.
Additional Contributions: The Oregon Health and Sciences Trauma Research Institute collaborated on the trauma registry database.