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

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 d...

Full description

Saved in:
Bibliographic Details
Published in:Aging & mental health 2006-01, Vol.10 (1), p.40-47
Main Authors: Vittengl, J. R., White, C. N., McGovern, R. J., Morton, B. J.
Format: Article
Language:English
Subjects:
Activities of Daily Living - psychology
Aged
Aged, 80 and over
Female
Humans
Male
Midwestern United States
Research Design
Rural Population
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:1360-7863
1364-6915
DOI:10.1080/13607860500307944