%0 Journal Article %J Alzheimer's & Dementia %D Forthcoming %T Using Medicare claims in identifying Alzheimer's disease and related dementias. %A Jain, Siddharth %A Rosenbaum, Paul R %A Reiter, Joseph G %A Geoffrey J Hoffman %A Small, Dylan S %A Ha, Jinkyung %A Hill, Alexander S %A Wolk, David A %A Timothy G. Gaulton %A Mark D Neuman %A Roderic G Eckenhoff %A Fleisher, Lee A %A Jeffrey H Silber %K administrative data %K Alzheimer's disease %K cognitive impairment %K Dementia %K Medicare %X

INTRODUCTION: This study develops a measure of Alzheimer's disease and related dementias (ADRD) using Medicare claims.

METHODS: Validation resembles the approach of the American Psychological Association, including (1) content validity, (2) construct validity, and (3) predictive validity.

RESULTS: We found that four items-a Medicare claim recording ADRD 1 year ago, 2 years ago, 3 years ago, and a total stay of 6 months in a nursing home-exhibit a pattern of association consistent with a single underlying ADRD construct, and presence of any two of these four items predict a direct measure of cognitive function and also future claims for ADRD.

DISCUSSION: Our four items are internally consistent with the measurement of a single quantity. The presence of any two items do a better job than a single claim when predicting both a direct measure of cognitive function and future ADRD claims.

%B Alzheimer's & Dementia %G eng %R 10.1002/alz.12199