Accepted for Publication: January 25, 2012.
Published Online: May 7, 2012. doi:10.1001/archpediatrics.2012.85
Author Contributions: Drs McCabe and West had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: McCabe, Teter, and Boyd. Acquisition of data: McCabe and Boyd. Analysis and interpretation of data: McCabe, West, and Teter. Drafting of the manuscript: McCabe, West, Teter, and Boyd. Critical revision of the manuscript for important intellectual content: McCabe, West, and Teter. Statistical analysis: McCabe and West. Obtained funding: McCabe, West, and Boyd. Administrative, technical, and material support: McCabe and Boyd. Study supervision: McCabe.
Financial Disclosure: None reported.
Funding/Support: The development of this article was supported by research grants DA018239 and DA031160 from the National Institute on Drug Abuse, National Institutes of Health. The MTF data were collected under research grant DA01411 from the National Institute on Drug Abuse, National Institutes of Health.
Disclaimer: The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute on Drug Abuse or the National Institutes of Health.
Additional Contributions: We thank the Substance Abuse and Mental Health Data Archive for providing access to these data and the anonymous reviewers for their helpful comments on a previous version of this article.