Validation of the Mayo-Portland Adaptability Inventory-4 (MPAI-4) and reference norms in a French-Canadian population with traumatic brain injury receiving rehabilitation

Abstract

Purpose Validate the factor structure and establish internal consistency reliability of the French-Canadian version of the Mayo-Portland Adaptability Inventory (MPAI-4), using a Canadian sample of adults with traumatic brain injury (TBI) receiving post-acute rehabilitation services. Materials and methods Psychometric analysis of French-Canadian MPAI-4 data from TBI adults (N = 1012) who received rehabilitation interventions and for whom a first French-Canadian MPAI-4 measure was completed between 2016 and 2020. Results Exploratory factor analysis was used to evaluate the factor structure of the French-Canadian MPAI-4. The final and best solution revealed three factors, which accounted for 48.68% of the variance. Using Cronbach’s alpha, all subscales showed good internal consistency (all 0.70 ≤ α ≤ 0.89). Reference norms for the TBI sample are provided, as well as descriptive raw data according to sex, age, TBI severity and rehabilitation setting. Conclusions The French-Canadian MPAI-4 factor structure is validated. The three factors extracted are similar to the three subscales of the original MPAI-4. The questionnaire shows good psychometric properties and represents a suitable tool for TBI adults receiving rehabilitation services in a French-Canadian context. The provided reference norms will also help guide the clinical use of the MPAI-4 in French-Canadian TBI populations. Implications for rehabilitation The MPAI-4 questionnaire measures functional abilities, global outcome and community integration following traumatic brain injury (TBI). The questionnaire can be used in inpatient, outpatient and vocational rehabilitation settings to assess TBI patients’ progress and outcomes, plan interventions and evaluate the effect of rehabilitation. The French-Canadian version of the MPAI-4 is validated and suitable to be used in French-Canadian post-acute TBI rehabilitation settings.