A study of the validity and reliability of the Chinese version of Loewenstein Occupational Therapy Cognitive Assessment

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A study of the validity and reliability of the Chinese version of Loewenstein Occupational Therapy Cognitive Assessment


Author: Leung, Yin-ching Esther
Title: A study of the validity and reliability of the Chinese version of Loewenstein Occupational Therapy Cognitive Assessment
Degree: M.Sc.
Year: 2003
Subject: Hong Kong Polytechnic University -- Dissertations
Cognition -- Testing
Department: Multi-disciplinary Studies
Dept. of Rehabilitation Sciences
Pages: xii, 203 leaves ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1714729
URI: http://theses.lib.polyu.edu.hk/handle/200/639
Abstract: Stroke is one of the leading cause of disability among adults in Hong Kong and many developed countries. The increasing number of stroke patients will pose a significant challenge to our health care system in the coming decade. There is an increasing demand for the development of cognitive assessment instruments for stroke, which provided detailed assessment of the cognitive and perceptual function and serve as a tool for outcome evaluation. The present study aims at developing and validating a Chinese version of Loewenstein Occupational Therapy Cognitive Assessmen (CV-LOTCA) for use in stroke rehabilitation. Expert panels that consisted of 10 members were set up to evaluate the content validity. Both quantitative and qualitative comments were collected by use of specially-designed questionnaire. Based on the result of panel review, all items and subtests were found relevant and representative with slight modification. Twelve technical terms were modified and some instructions in the administration procedure and scoring guideline were modified in order to enhance the fluency and accuracy of translation and facilitate the implementation of assessment for Hong Kong stroke population. To conduct studies of reliability and convergent validity, 35 subjects with stroke were recruited from Tai Po Hospital using a purposive sampling method. Twenty males and fifteen females stroke patients with mean age of 66.66 (SD 11.27) were recruited in this study. Results showed that CV-LOTCA had excellent test-retest and inter-rater reliability. The Intraclass correlation coefficients (ICC) of the subtests were in the range between from 0.91 to 0.99 in test-retest reliability and in the range between from 0.94 to 1.00 in inter-rater reliability. The internal consistency, as measured by Cronbach's alpha of the CV-LOTCA subtests ranged from 0.79 to 0.94. In the study of convergent validity, CV-LOTCA subtests scores were found moderate to high correlation with Chinese Mini-Mental Status Examination (r range between 0.48 to 0.73,p<0.0l). Besides, a low to moderate correlation was found between CV-LOTCA subtests scores and the Modified Barthel Index (r range between 0.30 to 0.51, p<0.05 and p<0.0l). Further analysis of the relationship with demographic variables indicated correlation existed between some of the CV-LOTCA subtests scores and demographic variables. The findings were analyzed and discussed in the light of limitation of the instrument, and the possible application of the study. A number of suggestions were made to further improve the validity and reliability of the instrument. There is evidence from the result that the CV-LOTCA is a valid and reliable instrument in assessing the cognitive and perceptual function of stroke patients. The implications of this study for clinical practice and research would be further discussed.

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