Item response models for longitudinal qu
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Jeffrey A. Douglas
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Article
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1999
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John Wiley and Sons
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English
⚖ 140 KB
👁 2 views
Assessment of quality of life is becoming standard in clinical trials. A popular method for measuring quality of life is with instruments which utilize multiple-item subscales, in which each item is scored on a Likert scale. Most statistical methods for the analysis of quality of life data in clinic