Minimal Detectable Change on the Lawton Instrumental Activities of Daily Living Scale in Community-Dwelling Patients With Schizophrenia

Sheau-Ling Huang; Wen-Shian Lu; Candy Chieh Lee; Hsuan-Wen Wang; Shu-Chun Lee; Ching-Lin Hsieh

doi:10.5014/ajot.2018.026898

Minimal Detectable Change on the Lawton Instrumental Activities of Daily Living Scale in Community-Dwelling Patients With Schizophrenia

Am J Occup Ther. 2018 Sep/Oct;72(5):7205195020p1-7205195020p7. doi: 10.5014/ajot.2018.026898.

Authors

Sheau-Ling Huang¹, Wen-Shian Lu², Candy Chieh Lee³, Hsuan-Wen Wang⁴, Shu-Chun Lee⁵, Ching-Lin Hsieh⁶

Affiliations

¹ Sheau-Ling Huang, MS, OTR, is Assistant Professor, School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan, and Adjunct Occupational Therapist, Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan.
² Wen-Shian Lu, PhD, OTR, is Associate Professor, School of Occupational Therapy, Chung Shan Medical University, Taichung, Taiwan, and Adjunct Occupational Therapist, Chung Shan Medical University Hospital, Taichung, Taiwan.
³ Candy Chieh Lee, MS, OTR, is Occupational Therapist, Department of Occupational Therapy, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan.
⁴ Hsuan-Wen Wang, MS, OTR, is Occupational Therapist, Department of Occupational Therapy, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan.
⁵ Shu-Chun Lee, MS, OTR, is Doctoral Candidate, School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan, and Chairperson, Department of Occupational Therapy, Taipei City Psychiatric Center, Taipei City Hospital, Taipei, Taiwan; A1057@tpech.gov.tw.
⁶ Ching-Lin Hsieh, PhD, OTR, is Professor, School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan; Adjunct Occupational Therapist, Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan; and Adjunct Professor, Department of Occupational Therapy, College of Medical and Health Science, Asia University, Taichung, Taiwan.

PMID: 30157010
DOI: 10.5014/ajot.2018.026898

Abstract

The main purpose of this study was to estimate the minimal detectable change (MDC) on the Lawton Instrumental Activities of Daily Living (LIADL) scale in community-dwelling patients with schizophrenia. Fifty-seven patients completed the LIADL assessment twice, about 14 days apart. Two scoring methods (dichotomous and polytomous) were used to record the patients' performance on the LIADL scale. The MDCs of the LIADL scale were 1.5 (dichotomous) and 4.4 (polytomous) points. The MDC percentages were 22.0% (dichotomous) and 22.5% (polytomous), both of which are within acceptable measurement errors. The test-retest reliabilities of the LIADL scale were both acceptable with two different scoring methods (dichotomous = .75; polytomous = .76). Users can choose the scoring method according to their individual needs.

Publication types

Research Support, Non-U.S. Gov't
Validation Study

MeSH terms

Activities of Daily Living / classification*
Adult
Female
Follow-Up Studies
Humans
Independent Living / psychology*
Male
Psychometrics / statistics & numerical data*
Reproducibility of Results
Schizophrenia / rehabilitation*
Schizophrenic Psychology*
Surveys and Questionnaires*