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Parkinson’s Disease
Volume 2017, Article ID 4151738, 7 pages
Research Article

Psychometric Evaluation of the Parkinson’s Disease Activities of Daily Living Scale

1Department of Health Sciences, Faculty of Medicine, Lund University, Lund, Sweden
2Department of Neurology and Rehabilitation, Skåne University Hospital, Lund, Sweden
3The PRO-CARE Group, School of Health and Society, Kristianstad University, Kristianstad, Sweden
4Department of Community Medicine and Rehabilitation, Occupational Therapy, Umeå University, Umeå, Sweden
5Memory Clinic, Skåne University Hospital, Malmö, Sweden

Correspondence should be addressed to Stina B. Jonasson; es.ul.dem@nossanoj.anits

Received 19 June 2017; Revised 22 July 2017; Accepted 17 August 2017; Published 25 September 2017

Academic Editor: Hélio Teive

Copyright © 2017 Stina B. Jonasson et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objective. To evaluate a set of psychometric properties (i.e., data completeness, targeting, and external construct validity) of the Parkinson’s disease Activities of Daily Living Scale (PADLS) in people with Parkinson’s disease (PD). Specific attention was paid to the association between PADLS and PD severity, according to the Hoehn & Yahr (H&Y) staging. Methods. The sample included 251 persons with PD (mean age 70 [SD 9] years). Data collection comprised a self-administered postal survey, structured interviews, and clinical assessments at home visits. Results. Data completeness was 99.6% and the mean PADLS score was 2.1. Floor and ceiling effects were 22% and 2%, respectively. PADLS scores were more strongly associated () with perceived functional independence, ADL dependency, walking difficulties, and self-rated PD severity than with variables such as PD duration and cognitive function (). PADLS scores differed across H&Y stages (Kruskal-Wallis test, ). Those in H&Y stages IV-V had more ADL disability than those in stage III (Mann–Whitney test, ), whereas there were no significant differences between the other stages. Conclusion. PADLS revealed excellent data completeness, acceptable targeting, and external construct validity. It seems to be well suited as a rough estimate of ADL disability in people with PD.