Validity of the Impact on Participation and Autonomy Questionnaire: A Comparison Between Two Countries

Purpose. To evaluate the cross-cultural validity of the five subscales of the Impact on Participation and Autonomy (IPA) measure and the full 31-item scale. Method. Data from two validation studies (Dutch and English) were pooled (n = 106). Participants (aged 18 – 75), known to rehabilitation services or GP practices, had conditions ranging from minor ailments to significant disability. Validity of the five subscales and the total scale was examined using Rasch analysis (Partial Credit Model). P values smaller than 0.01 were employed to allow for multiple testing. Results. A number of items in... Mehr ...