Author Contributions: Dr Langa 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: Langa, Foster, Larson.
Acquisition of data: Langa.
Analysis and interpretation of data: Langa,
Drafting of the manuscript: Langa.
Critical revision of the manuscript for important
intellectual content: Langa, Foster, Larson.
Statistical analysis: Langa.
Obtained funding: Langa.
Administrative, technical, or material support:
Study supervision: Larson.
Funding/Support: Dr Langa was supported by
a Career Development Award from the National Institute on Aging (K08 AG19180),
a New Investigator Research grant from the Alzheimer’s Association,
a Paul Beeson Physician Faculty Scholars in Aging Research award, and a John
A. Hartford Foundation grant to the Society of General Internal Medicine (2002-0013).
Dr Foster was supported in part by National Institutes of Health grant P50
AG08671. Dr Larson was supported in part by National Institutes of Health
grant U01 AG06781.
Role of the Sponsor The NIA, Alzheimer’s
Association, and Paul Beeson Physician Scholars Program had no role in the
conduct of the study nor in the decision to publish the results.