Submitted for Publication: January 31, 2013; final revision received April 2, 2013; accepted April 4, 2013.
Published Online: July 18, 2013. doi:10.1001/jamaophthalmol.2013.4694.
Study concept and design: Zhang, Chou, Saaddine, Parvathy, Ryskulova.
Acquisition of data: Chou, Parvathy.
Analysis and interpretation of data: Chou, Zhang, Beckles, Wilson, Lee, Parvathy, Ryskulova, Geiss.
Drafting of the manuscript: Zhang, Parvathy.
Critical revision of the manuscript for important intellectual content: Zhang, Beckles, Chou, Saaddine, Wilson, Lee, Ryskulova, Geiss.
Statistical analysis: Zhang, Chou, Parvathy, Ryskulova.
Administrative, technical, and material support: Zhang, Beckles, Wilson, Geiss.
Study supervision: Saaddine.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was supported by the National Center for Health Statistics, Centers for Disease Control and Prevention.
Role of the Sponsors: The National Center for Health Statistics designs and conducts the NHIS but was not involved in the analysis or interpretation of the study results or in the preparation of the manuscript. The Division of Diabetes Translation was involved in the design and conduct of the study; in the collection, analysis, and interpretation of the data; and in the preparation, review, and approval of this article before submission.
Disclaimer: The findings and conclusions in this article are those of the authors and do not necessarily represent the official position of the National Institutes of Health or the Centers for Disease Control and Prevention.
Additional Contributions: We thank the NHIS participants, without whom this study would not be possible.
Correction: This article was corrected online October 9, 2013, for an incorrect term in Methods and a sentence was added to table note “a” in Table 3.