Study concept and design: Kistin, Tompson, Sege.
Acquisition, analysis, or interpretation of data: Kistin, Tompson, Cabral, Winter, Silverstein.
Drafting of the manuscript: Kistin, Silverstein.
Critical revision of the manuscript for important intellectual content: All authors.
Statistical analysis: Kistin, Cabral.
Obtained funding: Kistin.
Administrative, technical, or material support: Sege.
Study supervision: Kistin, Sege, Silverstein.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: The study was funded by National Institutes of Health grant K23 HD078503-02 (awarded to Dr Kistin). Funding support for preparing the data for public distribution was provided by contract 90-CA-1370 between the National Center on Child Abuse and Neglect and Cornell University.
Role of the Funder/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: The data used in this report were made available by the National Data Archive on Child Abuse and Neglect at Cornell University in Ithaca, New York.