Author Contributions: Dr Li and Ms Yin had full access to all of the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Li, Cai.
Acquisition of data: Li.
Analysis and interpretation of data: Li, Yin, Cai, Temkin-Greener, Mukamel.
Drafting of the manuscript: Li, Yin.
Critical revision of the manuscript for important intellectual content: Li, Cai, Temkin-Greener, Mukamel.
Statistical analysis: Yin, Cai, Mukamel.
Obtained funding: Li, Mukamel.
Administrative, technical or material support: Li.
Study supervision: Li, Cai.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: This study was funded by grant R01AG032264 from the National Institute on Aging.
Role of the Sponsor: The sponsor was not involved in the design and conduct of the study; collection, management, analysis, and interpretation of the data; and preparation, review, or approval of the manuscript.