Author Contributions: Dr Fazel had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Fazel, Långström, Grann, Lichtenstein.
Acquisition of data: Fazel, Långström, Hjern, Lichtenstein.
Analysis and interpretation of data: Fazel, Långström, Hjern, Grann, Lichtenstein.
Drafting of the manuscript: Fazel, Lichtenstein.
Critical revision of the manuscript for important intellectual content: Fazel, Långström, Hjern, Grann, Lichtenstein.
Statistical analysis: Fazel, Grann, Lichtenstein.
Obtained funding: Långström, Lichtenstein.
Administrative, technical, or material support: Hjern, Lichtenstein.
Study supervision: Fazel.
Financial Disclosures: None reported.
Funding/Support: The Swedish Research Council–Medicine and the Swedish Council for Working Life and Social Research funded the study.
Role of the Sponsor: The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; or preparation, review, or approval of the manuscript.
Additional Contributions: We are grateful to Eva Carlström, MSc, Karolinska Institutet, for assistance with data extraction in this project, and to Helen Doll, DPhil, University of Oxford Department of Public Health, for statistical advice. Ms Carlström and Dr Doll did not receive specific compensation for their work with these data.