Cross-cultural evaluation of the Parkinson's Disease Questionnaire: tests of data quality, score reliability, response rate, and scaling assumptions in the United States, Canada, Japan, Italy, and Spain.
BACKGROUND AND OBJECTIVES: Health status measures, used to measure the subjective functioning and well-being of respondents, are increasingly being used in trials of treatments that are undertaken in a variety of countries. To assess comparability of results gained from such cross-cultural studies, it is important for researchers to know the comparability of instruments across cultures. One measure widely used in cross-cultural studies is the Parkinson's Disease Questionnaire (PDQ-39). We ev...Expand abstract
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