Author Contributions: Ms Barone 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: Barone, Yeh, Wolff, Brancati.
Acquisition of data: Barone, Yeh, Peairs, Stein, Derr.
Analysis and interpretation of data: Barone, Yeh, Snyder, Stein, Wolff, Brancati.
Drafting of the manuscript: Barone, Stein.
Critical revision of the manuscript for important intellectual content: Yeh, Snyder, Peairs, Stein, Derr, Wolff, Brancati.
Statistical analysis: Barone, Yeh, Peairs, Stein.
Obtained funding: Brancati.
Administrative, technical, or material support: Barone, Yeh, Stein, Wolff.
Study supervision: Yeh, Snyder, Peairs, Brancati.
Financial Disclosures: None reported.
Funding/Support: Ms Barone and Dr Derr are supported by the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) Diabetes and Obesity Training Grant (T32 DK062707). Dr Stein is supported by a National Institutes of Health fellowship from the Health Services and Administration (T32HP10025-14). Drs Yeh and Brancati are supported by the NIDDK Diabetes Research and Training Center (P60 DK079637). Dr Brancati is supported by the NIDDK Patient Oriented Research in Type 2 Diabetes grants (K24-DK62222). This work was not funded by an industry sponsor.
Role of the Sponsor: The sources of funding had no role in the design and conduct of the study; in the collection, management, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Additional Contributions: Nae-Yuh Wang, PhD, provided statistical review. Dr Wang is supported by a grant from the National Center for Research Resources (UL1 RR 025005) and received no additional compensation.