Submitted for Publication: March 6, 2013; final revision received April 10, 2013; accepted April 25, 2013.
Study concept and design: Ward, Hoffman, Carey, Della Santina.
Acquisition of data: Hoffman.
Analysis and interpretation of data: Ward, Agrawal, Hoffman, Carey, Della Santina.
Drafting of the manuscript: Ward, Hoffman.
Critical revision of the manuscript for important intellectual content: Ward, Agrawal, Hoffman, Carey, Della Santina.
Statistical analysis: Ward, Hoffman.
Obtained funding: Hoffman.
Administrative, technical, and material support: Hoffman, Carey.
Study supervision: Hoffman, Carey, Della Santina.
Conflict of Interest Disclosures: Dr Della Santina holds an equity interest in Labyrinth Devices LLC. The terms of this arrangement are being managed by the Johns Hopkins Office of Policy Coordination in accordance with Johns Hopkins University policies on potential conflicts of interest.
Funding/Support: During their work on this project, Dr Ward was supported by grant T32DC000027 from the National Institute on Deafness and Other Communication Disorders (NIDCD), and Dr Della Santina was supported by grants R01DC9255 and R01DC2390 from the NIDCD.
Disclaimer: Any analyses, interpretations, or conclusions reached by the authors are credited to the authors and not to the National Center for Health Statistics, which is responsible only for the initial data.
Additional Contributions: We appreciate the efforts of the staff at the National Center for Health Statistics with collaboration and funding from the NIDCD for completing the 2008 National Health Interview Survey Balance and Dizziness Supplement. Katalin Losonczy, NIDCD, assisted in verifying the results in Tables 3 and 4.