Paula W Rushton1,2, R Lee Kirby3, Francois Routhier4,5, Cher Smith6. 1. a École de réadaptation, Université de Montréal , Montréal , QC , Canada . 2. b Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal , Montréal , QC , Canada . 3. c Division of Physical Medicine and Rehabilitation , Dalhousie University , Halifax , NS , Canada . 4. d Department of Rehabilitation , Université Laval , Québec City , QC , Canada . 5. e Centre for Interdisciplinary Research in Rehabilitation and Social Integration, Institut de réadaptation en déficience physique de Québec , Québec City , QC , Canada , and. 6. f Department of Occupational Therapy , Nova Scotia Rehabilitation Centre Site, Queen Elizabeth II Health Sciences Centre , Halifax , NS , Canada.
Abstract
PURPOSE: To evaluate the test-retest reliability, concurrent validity and responsiveness of the Wheelchair Skills Test - Questionnaire (WST-Q) Version 4.1 for powered wheelchair users. METHODS: A volunteer sample of 72 community-dwelling, experienced powered wheelchair users, ranging in age from 50 to 77 years, participated in this study. Participants completed measures at baseline and 1 month later. RESULTS: Mean ± standard deviation total percentage WST-Q scores at baseline and 1 month were 83.7% ± 10.9 and 86.3% ± 10.0 respectively. Cronbach's alpha was 0.90 and the 1 month test-retest intraclass correlation coefficient (ICC1,1) was 0.78 (confidence interval: 0.68-0.86). There were no floor or ceiling effects. Percentages of agreement between baseline and 1 month for individual skills ranged from 72.2% to 100%. The correlations between the WST-Q and the objective Wheelchair Skills Test (WST), WheelCon and Life Space Assessment were r = 0.65, r = 0.47 and r = 0.47 respectively. The standard error of measurement (SEM) and smallest real difference (SRD) were 5.0 and 6.2 respectively. CONCLUSION: The WST-Q 4.1 has high internal consistency, strong test-retest reliability and strong support for concurrent validity and responsiveness. IMPLICATIONS FOR REHABILITATION: There is evidence of reliability, validity and responsiveness of the Wheelchair Skills Test - Questionnaire (WST-Q) among experienced older adult powered wheelchair users. The WST-Q can be used to measure powered wheelchair skills, guide intervention and measure change over time.
PURPOSE: To evaluate the test-retest reliability, concurrent validity and responsiveness of the Wheelchair Skills Test - Questionnaire (WST-Q) Version 4.1 for powered wheelchair users. METHODS: A volunteer sample of 72 community-dwelling, experienced powered wheelchair users, ranging in age from 50 to 77 years, participated in this study. Participants completed measures at baseline and 1 month later. RESULTS: Mean ± standard deviation total percentage WST-Q scores at baseline and 1 month were 83.7% ± 10.9 and 86.3% ± 10.0 respectively. Cronbach's alpha was 0.90 and the 1 month test-retest intraclass correlation coefficient (ICC1,1) was 0.78 (confidence interval: 0.68-0.86). There were no floor or ceiling effects. Percentages of agreement between baseline and 1 month for individual skills ranged from 72.2% to 100%. The correlations between the WST-Q and the objective Wheelchair Skills Test (WST), WheelCon and Life Space Assessment were r = 0.65, r = 0.47 and r = 0.47 respectively. The standard error of measurement (SEM) and smallest real difference (SRD) were 5.0 and 6.2 respectively. CONCLUSION: The WST-Q 4.1 has high internal consistency, strong test-retest reliability and strong support for concurrent validity and responsiveness. IMPLICATIONS FOR REHABILITATION: There is evidence of reliability, validity and responsiveness of the Wheelchair Skills Test - Questionnaire (WST-Q) among experienced older adult powered wheelchair users. The WST-Q can be used to measure powered wheelchair skills, guide intervention and measure change over time.
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Authors: R Lee Kirby; William C Miller; Francois Routhier; Louise Demers; Alex Mihailidis; Jan Miller Polgar; Paula W Rushton; Laura Titus; Cher Smith; Mike McAllister; Chris Theriault; Kara Thompson; Bonita Sawatzky Journal: Arch Phys Med Rehabil Date: 2015-07-30 Impact factor: 3.966
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