Author Contributions: Dr Hack 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: Hack, Taylor, Drotar.
Acquisition of data: Hack, Andreias.
Analysis and interpretation of data: Hack, Schluchter, Andreias, Margevicius, Taylor, Drotar, Cuttler.
Drafting of the manuscript: Hack, Cuttler.
Critical revision of the manuscript for important intellectual content: Hack, Schluchter, Andreias, Margevicius, Taylor, Drotar, Cuttler.
Statistical analysis: Hack, Schluchter, Andreias.
Obtained funding: Hack.
Administrative, technical, or material support: Hack, Margevicius, Taylor, Cuttler.
Study supervision: Hack, Taylor.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Hack reported she has received honoraria from the Cleveland Clinic, 2010 Contemporary Forums, and Bridgeport Hospital for lectures; payment for manuscript preparation from the Lancet for 2 invited commentaries; and royalties from Cambridge Press as coeditor on a book on neurodevelopmental outcomes of preterm birth. No other authors reported disclosures.
Funding/Support: This study was supported by grants R01 HD 39756, M01 RR000, and ULI RR024989 from the National Institutes of Health. Part of the salaries of Drs Hack, Schluchter, Taylor, and Andreias and Ms Margivicius was funded by the National Institutes of Health grants.
Role of the Sponsor: The National Institutes of Health had no role in the design and conduct of the study; the collection, analysis, and interpretation of the data; or the preparation, review, or approval of the manuscript.
Additional Contributions: We thank Kathy Winter (Case Western Reserve University), who coordinated the project and participated in the interview of the parents; Ellen Durand, MA, and Heather Marcinick, MA, research assistants (Case Western Reserve University), who tested the children and administered the questionnaires; Lydia Cartar, MA (University of British Columbia, Vancouver, Canada), who participated in the initial data management and analysis; and Bonnie Tarantino and Alpher Torres (University Hospitals of Cleveland Case Medical Center) who provided clerical assistance. The salaries of Kathy Winter, Ellen Durand, Heather Marcinick, and Lydia Cartar were funded by the National Institutes of Health grants. Lydia Cartar was compensated during the 8-year follow-up (while an employee of Case Western Reserve University) but not during the 14-year follow-up. Bonnie Tarantino and Alpher Torres were paid by University Hospitals of Cleveland Case Medical Center.
This article was corrected for errors on August 5, 2011.