Accepted for Publication: October 8, 2013.
Published Online: April 21, 2014. doi:10.1001/jamapediatrics.2013.4639.
Study concept and design: All authors.
Acquisition, analysis, or interpretation of data: O. Andersson, Domellöf, Hellström-Westas.
Drafting of the manuscript: O. Andersson, Domellöf, Hellström-Westas.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: O. Andersson, Domellöf, Hellström-Westas.
Obtained funding: O. Andersson, Hellström-Westas.
Administrative, technical, or material support: O. Andersson, D. Andersson, Hellström-Westas.
Study supervision: O. Andersson, Domellöf, Hellström-Westas.
Conflict of Interest Disclosures: None reported.
Funding/Support: This work was supported by grants from the Regional Scientific Council of Halland, common funds for development and research from the Southern Healthcare Region, H.R.H. Crown Princess Lovisa’s Society for Child Care, Uppsala University, and The Framework of Positive Scientific Culture, Hospital of Halland.
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; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication.
Additional Contributions: Josefin Roswall, MD, and research nurses Eivor Kjellberg and Monika Nygren, Department of Pediatrics, Hospital of Halland, helped collect the data and received compensation from the grants from the Regional Scientific Council of Halland. The Biostatistical Board, Hospital of Halland, provided valuable statistical advice. We are grateful to the staff at the antenatal units in Halland and at the Department of Obstetrics and Gynecology, Hospital of Halland, Halmstad, and to all the parents and infants who participated in the study.