Submitted for Publication: May 1, 2013; final revision received August 19, 2013; accepted September 20, 2013.
Published Online: February 12, 2014. doi:10.1001/jamapsychiatry.2013.4023.
Study concept and design: All authors.
Acquisition of data: Grant, O’Donnell, Creamer.
Analysis and interpretation of data: Grant, O’Donnell, Spittal, Studdert.
Drafting of the manuscript: Grant, O’Donnell, Spittal, Studdert.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Grant, Spittal, Studdert.
Obtained funding: All authors.
Administrative, technical, and material support: O’Donnell, Creamer, Studdert.
Study supervision: O’Donnell, Creamer, Studdert.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was funded by the Institute for Safety, Compensation and Recovery Research, Melbourne, Victoria, Australia, and a National Health and Medical Research Council Program Grant (568970). Dr Studdert was supported by an Australian Research Council Laureate Fellowship (FL1101000102).
Role of the Sponsors: The sponsors reviewed the manuscript but had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation or approval of the manuscript; and decision to submit the manuscript for publication.