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 @entity131 . SETTING: Community. @entity1 : Data from individuals (N=469) selected randomly from @entity1 who completed 1-year follow-up in the @entity131 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 ( @entity1 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 @entity1 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 @entity1 -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.

Another Look at the PART-O Using the XXXX National Database: Scoring to Optimize Psychometrics.

@entity1 :: ('9606', 'Species') :: ['PARTICIPANTS', 'participants', 'person'] @entity131 :: ('MESH:D001930', 'Disease') :: ['Traumatic Brain Injury Model Systems']
@entity131 :: (MESH:D001930,Disease) :: ['Traumatic Brain Injury Model Systems']
