Published Online: January 14, 2013. doi:10.1001/jamainternmed.2013.1576
Author Contributions: All authors had full access to all the data in the study and take full responsibility for the integrity of the data and the accuracy of the data analysis. Study concept and design: Vijayaraghavan, Penko, Bangsberg, Miaskowski, and Kushel. Acquisition of data: Penko, Bangsberg, and Kushel. Analysis and interpretation of data: Vijayaraghavan, Bangsberg, Miaskowski, and Kushel. Drafting of the manuscript: Vijayaraghavan, Miaskowski, and Kushel. Critical revision of the manuscript for important intellectual content: Penko, Miaskowski, and Kushel. Statistical analysis: Vijayaraghavan. Obtained funding: Bangsberg, Miaskowski, and Kushel. Administrative, technical, and material support: Penko, Bangsberg, Miaskowski, and Kushel. Study supervision: Bangsberg and Kushel.
Conflict of Interest Disclosures: None reported.
Funding/Support: This study was funded by a grant from the National Institute of Drug Abuse R01DA022550, and a grant from the National Institute of Mental Health R01MH54907. The Tenderloin Center for Clinical Research was supported by the University of California, San Francisco (UCSF), Clinical and Translational Institute grant, NIH/NCRR UCSF-CTSI UL1 RR024131. Dr Vijayaraghavan is supported by a postdoctoral fellowship from the Cancer Prevention and Control Division, Moores Cancer Center, University of California, San Diego.
Role of the Sponsor: The funders 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.
Previous Presentation: Results from this study were presented in an oral presentation at the Annual Meeting of the Society of General Internal Medicine; May 12, 2012; Orlando, Florida.
Additional Contributions: We thank the research assistants for conducting the patient interviews; the participants for their contribution to this study; and Eric Vittinghoff, PhD, and David Guzman, MSPH, for their contributions toward the statistical analysis and interpretation of data, and for their comments on an earlier draft of the manuscript.