Author Contributions: Dr Ogden 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: Ogden, Flegal.
Analysis and interpretation of data: Ogden, Carroll, Flegal.
Drafting of the manuscript: Ogden, Carroll, Flegal.
Critical revision of the manuscript for important intellectual content: Ogden, Carroll, Flegal.
Statistical analysis: Ogden, Carroll, Flegal.
Financial Disclosures: None reported.
Role of the Sponsor: All data used in this study were collected by the National Center for Health Statistics, Centers for Disease Control and Prevention. The Centers for Disease Control and Prevention reviewed and approved this report before submission.
Disclaimer: The findings and conclusions in this report are those of the authors and not necessarily of the agency.
Additional Contributions: Lester R. Curtin, PhD, National Center for Health Statistics, provided statistical support, and Yang Yu, MS, Harris Corporation, Hyattsville, Maryland, provided computer programming support. Neither received compensation.