Comparative validity of seven scoring systems for the instrumental activities of daily living scale in rural elders

J. R. Vittengl; C. N. White; R. J. McGovern; B. J. Morton

doi:10.1080/13607860500307944

Comparative validity of seven scoring systems for the instrumental activities of daily living scale in rural elders

J. R. Vittengl, C. N. White, R. J. McGovern, B. J. Morton

Department of Psychology

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

Lawton and Brody's eight-item Instrumental Activities of Daily Living (IADL) scale is used often with elderly patients but scored in several different ways. We scored the IADL with seven popular procedures ranging from relatively simple to complex (Guttman scores, summed and Rasch scores from dichotomous, trichotomous, and polytomous items) in a sample of rural elders (N = 231). We compared the IADL scales' prediction of concurrent cognitive functioning, depressive symptoms, psychosocial functioning, and health care use (medications, outpatient visits, inpatient days). Validity coefficients ranged from small to large among outcome variables but were highly consistent across IADL scoring procedures. Consequently, researchers and clinicians may prefer to use simpler IADL scoring procedures with this population.

Original language	English (US)
Pages (from-to)	40-47
Number of pages	8
Journal	Aging and Mental Health
Volume	10
Issue number	1
DOIs	https://doi.org/10.1080/13607860500307944
State	Published - Jan 1 2006

ASJC Scopus subject areas

Phychiatric Mental Health
Gerontology
Geriatrics and Gerontology
Psychiatry and Mental health

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abstract = "Lawton and Brody's eight-item Instrumental Activities of Daily Living (IADL) scale is used often with elderly patients but scored in several different ways. We scored the IADL with seven popular procedures ranging from relatively simple to complex (Guttman scores, summed and Rasch scores from dichotomous, trichotomous, and polytomous items) in a sample of rural elders (N = 231). We compared the IADL scales' prediction of concurrent cognitive functioning, depressive symptoms, psychosocial functioning, and health care use (medications, outpatient visits, inpatient days). Validity coefficients ranged from small to large among outcome variables but were highly consistent across IADL scoring procedures. Consequently, researchers and clinicians may prefer to use simpler IADL scoring procedures with this population.",

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