Accepted for Publication: May 3, 2011.
Author Contributions: Study concept and design: Ku, Shin, and Long. Acquisition of data: Ku, Jones, Shin, Byrne, and Long. Analysis and interpretation of data: Ku and Long. Drafting of the manuscript: Ku and Long. Critical revision of the manuscript for important intellectual content: Ku and Long. Statistical analysis: Ku and Long. Obtained funding: Ku. Administrative, technical, and material support: Shin. Study supervision: Ku.
Financial Disclosure: None reported.
Funding/Support: This project was funded by the Blue Cross Blue Shield of Massachusetts Foundation. We thank Shanna Shulman, BA, Marcy Revach, PhD, and Katherine Nordahl, MPA, for their advice. Karen Stockley, PhD, of the Urban Institute helped to analyze data from the Massachusetts Health Reform Survey.
Previous Presentation: An early version of this study was presented at the AcademyHealth Annual Research Meeting; June 29, 2010; Boston, Massachusetts.
This article was corrected for typographical error on August 8, 2011.