Submitted for Publication: February 13, 2015; final revision received April 14, 2015; accepted April 16, 2015.
Published Online: June 24, 2015. doi:10.1001/jamapsychiatry.2015.0846.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: Curran, Kearney, Kenny, Cryan, Dinan, Khashan.
Drafting of the manuscript: Curran, Dalman.
Critical revision of the manuscript for important intellectual content: Kearney, Kenny, Cryan, Dinan, Khashan.
Statistical analysis: Curran, Khashan.
Administrative, technical, or material support: Dalman, Khashan.
Study supervision: Kearney, Kenny, Dinan, Khashan.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grant 12/RC/2272 from The Irish Centre for Fetal and Neonatal Translational Research (Dr Kenny).
Role of the Funder/Sponsor: The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and the decision to submit the manuscript for publication.
Additional Contributions: Henrik Dal, MSc, Division of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden, provided data management support and advice. Cecilia Magnusson, PhD, Division of Public Health Epidemiology, Department of Public Health Sciences, Karolinska Institutet, Stockholm, Sweden, provided advice on the study design.