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American Journal of Alzheimer's Disease and Other Dementias®
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The content and properties of the Caregiver Activities Time Survey (CATS): An outcome measure for use in clinical trial research on Alzheimer's disease

Elizabeth C. Clipp, PhD, RN

Genratric Research, Education and Clinical Center, VA Medical Center; Department of Medicine and Centerffor the Study of Aging and Human Development, Duke University Medical Center, Durham, North Carolina

Michael J. Moore, PhD

The Fuqua School of Business, Duke University, Center for the Study of Aging and Human Development, Duke University Medical Center, Durham, North Carolina

Linda K. George, PhD

Department of Sociology, Center for the Study of Aging and Hman Development, Duke University Medical Center Durnam, North Calrolina

The CaregiverActivities Time Survey (CATS) was developed in 1990, pilot tested and revised twice before its use in a long-term study of Mentaneo (velnacrine maleate), conducted by Hoechst Roussel Pharmaceuticals Inc. (currently Hoechst Marion Roussel Pharmaceuticals). The instrument yields ratio level data and, by relying on caregivers' reports of minutes per task, is more objective and theoretically less ambiguous than other subjective ratings. Overall alpha of the informal scale is .51 suggesting modest internal consistency which is not surprising given that caregiving tasks are more discrete than items on scales presumed to tap one dimension. Test-retest reliability of individual items suggests good reproducibility of scores over a J0-week period Criterion-related validity was demonstrated by the strmng relationships shown between the CATS and several measures of cognitive functioning. Longitudinal data support the CATS'sensitivity to change in disease severity. Ratings by a panel of experts suggest very good to excellent content validity of both informal caregiving andformal or paid caregiving CATS scales

American Journal of Alzheimer's Disease and Other Dementias®, Vol. 11, No. 6, 3-9 (1996)
DOI: 10.1177/153331759601100602
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