Evaluation of Internal Construct Validity and Unidimensionality of the Brachial Assessment Tool, A Patient-Reported Outcome Measure for Brachial Plexus Injury
| Autor: | Bridget Hill, Andrea Bialocerkowski, Gavin Williams, Scott Ferris, John Olver, Julie F Pallant |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Male 030506 rehabilitation medicine.medical_specialty Psychometrics Adolescent Physical Therapy Sports Therapy and Rehabilitation behavioral disciplines and activities Upper Extremity 03 medical and health sciences Disability Evaluation Young Adult 0302 clinical medicine International Classification of Functioning Disability and Health Activities of Daily Living medicine Outpatient clinic Humans Brachial Plexus Patient Reported Outcome Measures Physical Therapy Modalities Aged Aged 80 and over Rasch model Rehabilitation Age Factors Construct validity Reproducibility of Results Recovery of Function Middle Aged Differential item functioning Exploratory factor analysis Cross-Sectional Studies Physical therapy Patient-reported outcome Female 0305 other medical science Psychology Factor Analysis Statistical 030217 neurology & neurosurgery |
| Zdroj: | Archives of physical medicine and rehabilitation. 97(12) |
| ISSN: | 1532-821X |
| Popis: | Objective To evaluate the internal construct validity and dimensionality of a new patient-reported outcome measure for people with traumatic brachial plexus injury (BPI) based on the International Classification of Functioning, Disability and Health definition of activity. Design Cross-sectional study. Setting Outpatient clinics. Participants Adults (age range, 18–82y) with a traumatic BPI (N=106). Interventions There were 106 people with BPI who completed a 51-item 5-response questionnaire. Responses were analyzed in 4 phases (missing responses, item correlations, exploratory factor analysis, and Rasch analysis) to evaluate the properties of fit to the Rasch model, threshold response, local dependency, dimensionality, differential item functioning, and targeting. Main Outcome Measures Not applicable, as this study addresses the development of an outcome measure. Results Six items were deleted for missing responses, and 10 were deleted for high interitem correlations >.81. The remaining 35 items, while demonstrating fit to the Rasch model, showed evidence of local dependency and multidimensionality. Items were divided into 3 subscales: dressing and grooming (8 items), arm and hand (17 items), and no hand (6 items). All 3 subscales demonstrated fit to the model with no local dependency, minimal disordered thresholds, no unidimensionality or differential item functioning for age, time postinjury, or self-selected dominance. Subscales were combined into 3 subtests and demonstrated fit to the model, no misfit, and unidimensionality, allowing calculation of a summary score. Conclusions This preliminary analysis supports the internal construct validity of the Brachial Assessment Tool, a unidimensional targeted 4-response patient-reported outcome measure designed to solely assess activity after traumatic BPI regardless of level of injury, age at recruitment, premorbid limb dominance, and time postinjury. Further examination is required to determine test-retest reliability and responsiveness. |
| Databáze: | OpenAIRE |
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