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Measurement Properties of the MPAI-4 in Veterans With mTBI

Published:December 07, 2019DOI:https://doi.org/10.1016/j.apmr.2019.10.191

      Abstract

      Objectives

      To determine whether the measurement properties of the Mayo-Portland Adaptability Inventory Version 4 (MPAI-4) and its participation index (M2PI), which have been adopted as 2 outcome measures in the Veterans Health Administration (VHA) National Polytrauma Rehabilitation Systems of Care, are adequate in veterans with mild traumatic brain injury (mTBI).

      Design

      Cross-sectional.

      Setting

      Outpatient rehabilitation.

      Participants

      Postdeployment veterans with blast-related mTBI (N=177).

      Intervention

      Not applicable.

      Main Outcome Measures

      Mayo-Portland Adaptability Inventory Version 4 (MPAI-4) and Community Integration Questionnaire (CIQ).

      Results

      The unidimensional factor structure of the MPAI-4 total and 3 index scores (abilities, adjustment, participation) were confirmed. Eight of the 30 items were removed for violating monotonicity (6 items) and exceeding Rasch infit (2 items). The rating scale was collapsed from 5 to 3 ratings because of structure issues. The remaining 22 MPAI-4 items demonstrated excellent item/person reliability (0.98/0.91) and separated person ability into 4 strata. Two of the MPAI-4 index scores (abilities and adjustment) had good measurement properties. The third index, M2PI, retained only 3 items that had adequate person reliability (0.75) but separated person ability into only 2 strata. A significant but fair association with the CIQ was demonstrated with the modified MPAI-4.

      Conclusions

      The MPAI-4 has been validated in moderate to severe traumatic brain injury but required modification when used in active military personnel with mTBI. We also identified the need for modification of the MPAI-4 to support adequate psychometrics when measuring outcomes in veterans with mTBI. Additional validation of the M2PI is needed in veterans and active military personnel with mTBI, to determine whether the M2PI should continue to be used as an outcome measure in the VHA polytrauma rehabilitation systems.

      List of abbreviations:

      CIQ (Community Integration Questionnaire), MP (military personnel), MPAI-4 (Mayo-Portland Adaptability Inventory Version 4), M2PI (Mayo-Portland Adaptability Inventory Participation Index), mTBI (mild traumatic brain injury), PTSD (posttraumatic stress disorder), TBI (traumatic brain injury), VHA (Veterans Health Administration)

      Keywords

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