• Mieke Cardol, Anita Beelen, Geertrudis A van den Bos, Bareld A de Jong, Imelda J de Groot, and Rob J de Haan.
• Department of Rehabilitation, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands. m.cardol@nivel.nl
• Arch Phys Med Rehabil. 2002 Nov 1; 83 (11): 1524-9.

ObjectiveTo evaluate the responsiveness of a newly developed generic questionnaire, the Impact on Participation and Autonomy (IPA), which focuses on 2 aspects of participation: perceived participation and the experience of problems.DesignPreliminary study of questionnaire responsiveness compared with transition indices. Participants completed 2 assessments, 3 months apart. To measure change, they completed 9 transition indices at the second assessment. One transition index assessed perceived change in general, the other 8 addressed 1 of the specific problem experience items in the IPA.SettingOutpatient clinic of the rehabilitation department of an academic hospital.ParticipantsFifty-seven consecutive persons admitted for multidisciplinary rehabilitation treatment, with various diagnoses, were enrolled in the study; 49 persons completed both assessments.InterventionsNot applicable.Main Outcome MeasuresStandardized response mean (SRM) and area under the receiver operating characteristic curve (AUC) for participation domain scores and problem scores.ResultsSRMs and AUCs for the participation domains ranged from 0.1 to 1.3 and from 50% to 92%, respectively. The SRMs of the items on the experience of problems ranged from 0.4 to 1.5, whereas their AUCs ranged from 56% to 74%.ConclusionsThe IPA detected within-person improvement over time, but its responsiveness must be confirmed in a larger study sample.Copyright 2002 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation

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