The PROMIS Physical Function item bank was calibrated to a standardized metric and shown to improve measurement efficiency

Matthias Rose(Patient-Centered Outcomes Research Institute), John E. Ware(University of Massachusetts Chan Medical School), Jakob Bue Bjørner(University of Copenhagen), James F. Fries(Stanford University), Bonnie Bruce(Centers for Disease Control and Prevention), Barbara Gandek
Journal of Clinical Epidemiology
April 1, 2014
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