Author Contributions: Dr Brown 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: Peikes, Chen, Schore, Brown.
Acquisition of data: Peikes, Chen, Brown.
Analysis and interpretation of data: Peikes, Chen, Schore, Brown.
Drafting of the manuscript: Peikes, Chen, Schore, Brown.
Critical revision of the manuscript for important intellectual content: Peikes, Chen, Schore, Brown.
Statistical analysis: Peikes, Chen, Schore, Brown.
Obtained funding: Peikes, Chen, Schore, Brown.
Administrative, technical, or material support: Peikes, Brown.
Study supervision: Brown.
Financial Disclosures: The authors are all salaried employees of Mathematica Policy Research Inc and receive no compensation from any other source. They do not own stock in any of the programs being evaluated or stand to profit in any way, directly or indirectly, from particular findings in this article.
Funding/Support: Data collection and original analysis were funded by grant 500-95-0047 from the Centers for Medicare & Medicaid Services (CMS). There were no industry sponsors of this study. The writing of the manuscript was funded solely by Mathematica Policy Research Inc.
Role of the Sponsor: The CMS staff were involved in the selection of program sites for the demonstration and the decision to require random assignment. CMS was not otherwise involved in the design and conduct of the study, in the collection, management, analysis, or interpretation of the data, or in the preparation, review, or approval of the manuscript.
Disclaimer: The opinions and interpretations expressed in this article are solely the authors and do not represent the views of CMS staff or the programs that were evaluated.
Previous Presentations: Results from an earlier version of the study, similar to those shown here, are contained in a report to Congress dated February 21, 2008, for which broad public release has been delayed until publication in this journal. A brief overview of some of the results was presented in part at the Academy Health's Annual Research meeting; June 9, 2008; Washington, DC.
Additional Contributions: We thank our Mathematica colleague Carol Razafindrakoto for programming support. Mr Razafindrakoto, a salaried Mathematica employee like the authors, received no special compensation for his work on the manuscript. We also appreciate the care coordination programs and Medicare beneficiaries for participating in the study site visits and surveys. They received no compensation for these activities and had no role in the analysis or preparation of the manuscript.