Article

OBJECTIVE: To integrate previous approaches to scoring the Participation
Assessment with Recombined Tools-Objective (PART-O) in a unidimensional scale.
DESIGN: Retrospective analysis of PART-O data from the Traumatic Brain Injury
Model Systems. SETTING: Community. PARTICIPANTS: Data from individuals (N=469)
selected randomly from participants who completed 1-year follow-up in the
Traumatic Brain Injury Model Systems were used in Rasch model development. The
model was subsequently tested on data from additional random samples of similar
size at 1-, 2-, 5-, 10-, and >15-year follow-ups. INTERVENTIONS: Not applicable.
MAIN OUTCOME MEASURE: PART-O. RESULTS: After combining items for productivity and
social interaction, the initial analysis at 1-year follow-up indicated relatively
good fit to the Rasch model (person reliability=.80) but also suggested item
misfit and that the 0-to-5 scale used for most items did not consistently show
clear separation between rating levels. Reducing item rating scales to 3 levels
(except combined and dichotomous items) resolved these issues and demonstrated
good item level discrimination, fit, and person reliability (.81), with no
evidence of multidimensionality. These results replicated in analyses at each
additional follow-up period. CONCLUSIONS: Modifications to item scoring for the
PART-O resulted in a unidimensional parametric equivalent measure that addresses
previous concerns about competing item relations, and it fit the Rasch model
consistently across follow-up periods. The person-item map shows a progression
toward greater community participation from solitary and dyadic activities, such
as leaving the house and having a friend through social and productivity
activities, to group activities with others who share interests or beliefs.
CI - Copyright (c) 2016 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS