Published Online: November 30, 2010. doi:10.1001/jama.2010.1797
Author Contributions: Dr Yin 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: Yin, Wolf, Dreyer, Sanders, Parker.
Acquisition of data: Yin.
Analysis and interpretation of data: Yin, Wolf, Dreyer, Sanders, Parker.
Drafting of the manuscript: Yin, Dreyer.
Critical revision of the manuscript for important intellectual content: Yin, Wolf, Dreyer, Sanders, Parker.
Statistical analysis: Yin, Dreyer.
Obtained funding: Yin, Wolf, Dreyer, Sanders, Parker.
Administrative, technical, or material support: Yin, Dreyer, Parker.
Study supervision: Dreyer, Parker.
Financial Disclosures: Dr Yin reported receiving funds from Pfizer as part of its Fellowship in Health Literacy/Clear Health Communication and having served as a paid consultant to McKing Consulting Corporation. Dr Wolf reported receiving unrestricted research grant funding from McNeil Consumer Healthcare and Abbott Foundation and having served as a paid consultant to McNeil Consumer Healthcare and Abbott Laboratories. Dr Sanders reported receiving unrestricted research grant funding from Pfizer as part of its Fellowship in Health Literacy/Clear Health Communication and having served as a paid consultant to Pfizer's Clear Health Communication program. Dr Parker reported receiving unrestricted research grant funding from McNeil Consumer Health and Abbott Foundation and having served as a paid consultant to Johnson & Johnson and McKing Consulting Corporation. No other disclosures were reported.
Funding/Support: Dr Yin is funded by a career development grant through the Robert Wood Johnson Physician Faculty Scholars Program.
Role of the Sponsor: The Robert Wood Johnson Foundation had no role in the design and conduct of the study; in the collection, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript.
Disclaimer: The statements, findings, conclusions, views, and opinions contained and expressed herein are not necessarily those of IMS Health or any of its affiliated or subsidiary entities.
Previous Presentation: Preliminary data from this study were presented at a meeting of the IOM Roundtable on Health Literacy, “The Safe Use Initiative and Health Literacy: A Workshop”; April 27, 2010; Washington, DC.
Additional Contributions: We extend our thanks to Art Kellermann, MD, MPH, RAND Corporation; Alan Mendelsohn, MD, New York University School of Medicine; Gail Slap, MD, MS, University of Pennsylvania School of Medicine; and Linda van Schaick, MSEd, New York University School of Medicine; for their critical review of this study. We thank Jennifer King, MPH, Northwestern University Feinberg School of Medicine, for abstraction of product data, as well as our research staff who assisted in the acquisition of products. We acknowledge Dan Kaniarasseril (freelance photographer) for the photographs used in Figures 2 through 4. None of these persons received compensation for these contributions. We also thank IMS Health for its assistance in providing us with the list of top-selling nonprescription medications categorized as analgesic, cough/cold, allergy, or gastrointestinal products for the 52 weeks ending October 30, 2009 (Medicine Cabinet, IMS Health).