The wheelchair use confidence scale: italian translation, adaptation, and validation of the short form

Objective: We developed an Italian version of the Wheelchair Use Confidence Scale for Manual Users- Short Form (WheelCon-M-I-short form) and examined its reliability and validity. Methods: The original scale was translated from English to Italian using the “Translation and Cultural Adaptation of Patient Reported Outcomes Measures–Principles of Good Practice” guidelines. The WheelCon-M-I-short form was administered to experienced manual wheelchair users who had a variety of diagnoses. Its internal consistency and test–retest reliability were examined. Its concurrent validity was evaluated using Pearson correlation coefficients with the Italian version of the Wheelchair Outcome Measure (WhOM-I) and the Italian version of the Barthel index (BI). Results: The WheelCon-M-I-short form was administered to 31 subjects. The mean ± SD of the WheelCon- M-I-short form score was 7.5±1.9. All WheelCon-M-I-short form items were either identical or similar in meaning to the WheelCon-M-short form items. Cronbach’s a for the WheelCon-M-I-short form was 0.95 (p<0.01), and the test–retest reliability (ICC) was 0.978 (p<0.01). The Pearson correlation coefficient of the WheelCon-M-I-short form scores with the WhOM-I scores was 0.7618 (p<0.01). The Pearson correl- ation coefficient of the WheelCon-M-I-short form scores with the Italian BI scores was 0.638 (p < 0.01). Conclusions: The WheelCon-M-I-short form was found to be reliable and a valid outcome measure for assessing manual wheelchair confidence in the Italian population.