Author Contributions: Dr Tseng 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: Tseng, Mangione, Brook.
Acquisition of data: Tseng.
Analysis and interpretation of data: Tseng, Mangione, Brook, Keeler, Dudley.
Drafting of the manuscript: Tseng.
Critical revision of the manuscript for important intellectual content: Tseng, Mangione, Brook, Keeler, Dudley.
Statistical analysis: Tseng, Keeler.
Obtained funding: Tseng, Mangione, Dudley.
Administrative, technical, or material support: Tseng.
Study supervision: Tseng, Mangione, Brook, Keeler, Dudley.
Financial Disclosures: The authors reported no financial disclosures. Dr Brook reports that his spouse, Dr Jacqueline Kosecoff, is the CEO of Ovations Pharmacy Solutions.
Funding/Support: Dr Tseng is funded by the Robert Wood Johnson Foundation (RWJF) Generalist Physician Faculty Scholars Program (051085). Dr Mangione is partially supported by the University of California, Los Angeles Resource Center for Minority Aging Research (RCMAR), NIA grant AG21684. Dr Dudley's work on this article was supported by an RWJF Investigator Award in Health Policy.
Role of the Sponsors: The funding organizations had no role in the design and conduct of the study; the collection, management, analysis, or interpretation of the data; or the preparation, review, or approval of the manuscript.
Acknowledgment: We thank Eric Jackson, PharmD, BCPS (University of Connecticut School of Medicine, Farmington, and St Francis Hospital and Medical Center, Hartford), for his invaluable help in evaluating the evidence-based literature on treatment classes and Luella Manlucu (Department of Family Medicine and Community Health, John A. Burns School of Medicine at the University of Hawaii, Honolulu) for her dedication in compiling Medicare formulary data. Dr Jackson's contributions were funded through a paid consultant role with Dr Tseng's RWJF grant; Ms Manlucu's contributions were funded through a 0.5 FTE research assistant position with Dr Tseng's RWJF grant.