Alan Osiovich & Jeannise Nichols

Test-Retest Reliability of the Wheelchair Outcome Measure for Young People

Authors: Jeannise Nichols, Alan Osiovich, Dr. Debra Field, & Dr. William Miller

Introduction. Children with mobility limitations often have several participation restrictions. Power and/or manual wheelchairs can help to reduce participation restrictions in a child’s life. The Wheelchair Outcome Measure for Young People (WhOM-YP) is a paediatric adaptation of the Wheelchair Outcome Measure, a client-centred semi-structured interview outcome tool. The WhOM-YP captures participation outcomes considered important for children who use manual or power wheelchairs, either as a self-report or administered by parent proxy (dependent on age or abilities of the child). Objective. This study estimated the WhOM-YP’s test-retest reliability when administered to parents providing a proxy response. Methods. In this study, the WhOM-YP was administered on two occasions two weeks apart to 18  parents of children under 19 years of age who use manual or power wheelchairs for mobility. A volunteer  sample of parents were identified by their treating occupational or physical therapist. Exclusion criteria ensured that there were no acute medical and/or equipment changes between sessions. Results. An intra-class correlation (ICC 2,1 ) with 95% confidence intervals was calculated in order to estimate the WhOM-YP test-retest reliability coefficient. We hypothesize that there will be an acceptable test-retest reliability (ICC > 0.70), based on previously published WhOM test-retest reliability estimates. Conclusions. Estimates within the acceptable range of test-retest reliability will give therapists greater confidence in using the WhOM-YP with parents to evaluate the impact of wheeled mobility interventions on their child’s participation.