Author Contributions: Dr Gill 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: Gill.
Acquisition of data: Gill.
Analysis and interpretation of data: Gill,
Allore, Holford, Guo.
Drafting of the manuscript: Gill, Allore, Guo.
Critical revision of the manuscript for important
intellectual content: Gill, Allore, Holford, Guo.
Statistical analysis: Allore, Holford, Guo.
Obtained funding: Gill.
Administrative, technical, or material support:
Study supervision: Gill.
Funding/Support: The work for this article
was funded by grant R01AG17560 from the National Institute on Aging and grants
from the Robert Wood Johnson Foundation, Paul Beeson Physician Faculty Scholar
in Aging Research Program, and Patrick and Catherine Weldon Donaghue Medical
Research Foundation. The study was conducted at the Yale Claude D. Pepper
Older Americans Independence Center (grant P30AG21342). Dr Gill is the recipient
of a Midcareer Investigator Award in Patient-Oriented Research (grant K24AG021507)
from the National Institute on Aging.
Role of the Sponsors: The organizations funding
this study had no role in the design or conduct of the study; in the collection,
management, analysis, or interpretation of the data; or in the preparation,
review, or approval of the manuscript.
Acknowledgment: We thank Denise Shepard, BSN,
MBA, Shirley Hannan, RN, Andrea Benjamin, BSN, Martha Oravetz, RN, Alice Kossack,
Barbara Foster, Shari Lani, Alice Van Wie, and Bernice Hebert,† RN,
for assistance with data collection; Evelyne Gahbauer, MD, MPH, for data management
and programming; Wanda Carr and Geraldine Hawthorne for assistance with data
entry and management; Peter Charpentier, MPH, for development of the participant
tracking system; and Joanne McGloin, MDiv, MBA, for leadership and advice
as the project director.