• Stephen J Page, Marla A Shawaryn, Alison N Cernich, and John M Linacre.
• Department of Physical Medicine and Rehabilitation, University of Cincinnati College of Medicine, 202 Goodman Drive, Suite 275, Cincinnati, OH 45267-0840, USA.
• Arch Phys Med Rehabil. 2002 Nov 1;83(11):1579-84.

ObjectiveTo evaluate the measurement properties of the Revised Oswestry Disability Questionnaire (RODQ) by using rating scale analyses.DesignCalibration of item responses by using a data set.SettingFour outpatient therapy clinics in the northeastern United States.PatientsConvenience sample of 95 community-dwelling adults exhibiting mild to severe low back pain-related disability (LBP-D).InterventionsNot applicable.Main Outcome MeasureThe RODQ.ResultsSeveral Rasch analyses were performed, with 1 item deleted and 2 response categories collapsed, creating a better test without increased error. A schema for item administration and evaluation was also developed.ConclusionsBy using the abbreviated scale, suggested item order, and predicted responses, abbreviated versions of the instrument can be applied to measure LBP-D more efficiently.Copyright 2002 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation

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