Submitted for Publication: January 14, 2014; final revision received May 15, 2014; accepted May 18, 2014.
Published Online: August 13, 2014. doi:10.1001/jamapsychiatry.2014.1332.
Study concept and design: Khandaker, Lewis, Jones.
Acquisition, analysis, or interpretation of data: Khandaker, Pearson, Zammit, Lewis.
Drafting of the manuscript: Khandaker, Jones.
Critical revision of the manuscript for important intellectual content: Khandaker, Pearson, Zammit, Lewis.
Statistical analysis: Khandaker, Pearson.
Obtained funding: Khandaker.
Administrative, technical, or material support: Zammit.
Study supervision: Lewis, Jones.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by doctoral clinical research training grant 094790/Z/10/Z from the Wellcome Trust PhD Programme for Clinicians, Cambridge Institute of Medical Research, University of Cambridge (Dr Khandaker), Wellcome Trust grants 095844/Z/11/Z and 088869/Z/09/Z and National Institute for Health Research grant RP-PG-0606-1335 (Dr Jones), and Wellcome Trust grant 084268/Z/07/Z for studying depression and UK Medical Research Council grant G0701503 for studying psychosis in ALSPAC. Medical Research Council grant 74882, Wellcome Trust grant 092731, and the University of Bristol provide core support for the ALSPAC birth cohort.
Role of the Sponsor: The funding bodies had no role in design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: We are grateful to all of the families who took part in this study, the midwives for their help in recruiting the families, and the whole ALSPAC team including interviewers, computer and laboratory technicians, clerical workers, research scientists, statisticians, volunteers, managers, receptionists, and nurses.