Title
Measuring disability, the agreement between self evaluation and observation of performance
Author
Wijlhuizen, G.J.
Ooijendijk, W.
Publication year
1999
Abstract
Purpose: In 1981, eight countries and the World Health Organization (WHO) reached consensus about applying a similar disability questionnaire in their health surveys that was related to the ICIDH. In 1992 a revised version, the WHO-disability questionnaire, was recommended. In this paper the concurrent validity of 10 items of the questionnaire is evaluated by measuring the agreement with observed performance of corresponding tasks. Method: The disability questionnaire was sent to 750 subjects. From the respondents (468) 93 were selected, based on their reported disability, and 10 performance tasks were observed. The agreement was measured for individual items and for all items together in distinguishing between persons with no, or at least one disability. Results: A low to moderate agreement was found between self reported and observed disability. In general, observation resulted in lower disability ratings. Among 24% of those who reported at least one disability, no disability was observed. Persons among whom at least one disability was observed, only 2% (n = 1) reported no disability in the questionnaire. Conclusions: Although the concurrent validity is low to moderate between the results of the WHO-disability questionnaire and observation, the questionnaire is highly sensitive for detecting persons with at least one disability. The specificity of the questionnaire must be increased by additional questions.
Subject
Workplace
Arbeidsongeschiktheid
Wereldgezondheidsorganisatie
WHO
UNESCO
Lichamelijk gehandicapten
Invaliden
Statistisch onderzoek
Metingen
Meetmethoden
Adult
Disability
Halth survey
Major clinical study
Observation
Questionnaire
Self evaluation
Self report
Task performance
World health organization
Activities of Daily Living
Aged
Disability Evaluation
Disabled Persons
Female
Humans
Male
Reproducibility of Results
Sensitivity and Specificity
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DOI
https://doi.org/10.1080/096382899297981
TNO identifier
438392
Source
Disability and rehabilitation, 21 (2), 61-67
Document type
article