Responsiveness and Minimal Important Change of the Pain Self-Efficacy Questionnaire and Short Forms in Patients With Chronic Low Back Pain

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A. S. Zigmond, R. P. Snaith · Acta Psychiatrica Scandinavica · 1983 · 46.6K citations

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Quality criteria were proposed for measurement properties of health status questionnaires

Caroline B. Terwee, Sandra D.M. Bot, Michiel R. de Boer et al. · Journal of Clinical Epidemiology · 2006 · 10.8K citations · Full text

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Clinical importance of changes in chronic pain intensity measured on an 11-point numerical pain rating scale

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