Re-standardization of the Korean- Instrumental Activities of Daily Living (K-IADL): Clinical Usefulness for Various Neurodegenerative Diseases.
10.12779/dnd.2018.17.1.11
- Author:
Juhee CHIN
1
;
Jaeseol PARK
;
Soh Jeong YANG
;
Jiyoung YEOM
;
Yisuh AHN
;
Min Jae BAEK
;
Hui Jin RYU
;
Byung Hwa LEE
;
Noh Eul HAN
;
Kyung Hi RYU
;
Yeonwook KANG
Author Information
1. Department of Neurology, Samsung Medical Center, Seoul, Korea.
- Publication Type:Original Article
- Keywords:
Activities of Daily Living;
Dementia;
Mild Cognitive Impairment
- MeSH:
Activities of Daily Living*;
Alzheimer Disease;
Caregivers;
Cognition Disorders;
Dementia;
Dementia, Vascular;
Depression;
Hospitals, General;
Humans;
Korea;
Mass Screening;
Mild Cognitive Impairment;
Parkinson Disease;
Reproducibility of Results;
Retrospective Studies;
Sensitivity and Specificity;
Weights and Measures
- From:Dementia and Neurocognitive Disorders
2018;17(1):11-22
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND AND PURPOSE: Evaluating instrumental activities of daily living (IADL) is an important part of procedure to diagnose dementia. The Korean-Instrumental Activities of Daily Living (K-IADL) has been used extensively in Korea. However, its cut-off score has not been reformulated since 2002. The purpose of this study was to yield a new optimal cut-off score for the K-IADL and confirm the validity of this new cut-off score with various dementia groups. METHODS: We retrospectively collected a total of 2,347 patients' K-IADL data from 6 general hospitals in Korea. These patients had mild cognitive impairment (MCI) or dementia with various etiologies for cognitive impairment. We also recruited a normal control group (n=254) from the community. Korean-Mini Mental State Examination, Short version of the Geriatric Depression Scale, Clinical Dementia Rating, and Global Deterioration Scale were administered to all participants. Caregivers completed K-IADL and Barthel Index. RESULTS: K-IADL scores were significantly different among dementia subgroups, but not significantly different among MCI subgroups. Based on internal consistency, correlations with other scales, and factor analysis, K-IADL showed excellent reliability and validity. The new optimal cut-off score to diagnose dementia was 0.40, which gave a sensitivity of 0.901 and a specificity of 0.916. Positive predictive value for dementia using the new cut-off score was 94.2% for Alzheimer's disease, 100% for vascular dementia, and 84% for Parkinson's disease. CONCLUSIONS: Our results illustrate that the new K-IADL cut-off score of 0.40 is reliable and valid for screening impairments of daily functioning resulting from various etiologies.
