Author Contributions: Dr Lauderdale 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: King, Knutson, Rathouz, Sidney, Liu, Lauderdale.
Acquisition of data: Knutson, Sidney, Liu.
Analysis and interpretation of data: King, Rathouz, Lauderdale.
Drafting of the manuscript: King, Lauderdale.
Critical revision of the manuscript for important intellectual content: Knutson, Rathouz, Sidney, Liu.
Statistical analysis: King, Rathouz, Lauderdale.
Obtained funding: Sidney, Liu, Lauderdale.
Administrative, technical, or material support: Knutson, Liu, Lauderdale.
Study supervision: Liu, Lauderdale.
Financial Disclosures: None reported.
Funding/Support: Research for this study was supported by grant AG 11412 from the National Institute on Aging and the Medical Scientist National Research Service Award T 32 GM07281. The Coronary Artery Risk Development in Young Adults (CARDIA) study is supported by US Public Health Service contracts NO1-HC-48047, NO1-HC-48048, NO1-HC-48049, NO1-HC-48050, and NO1-HC-95095 from the National Heart, Lung, and Blood Institute.
Role of the Sponsor: No funding organization or sponsor aside from the National Heart, Lung, and Blood Institute played a role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.