Article

OBJECTIVE: To investigate the neurobehavioral pattern of recovery of
consciousness as reflected by performance on the subscales of the Coma Recovery
Scale-Revised (CRS-R). DESIGN: Retrospective item response theory (IRT) and
factor analysis. SETTING: Inpatient rehabilitation facilities. PARTICIPANTS:
Rehabilitation inpatients (N=180) with posttraumatic disturbance in consciousness
who participated in a double-blinded, randomized, controlled drug trial.
INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Scores on CRS-R subscales.
RESULTS: The CRS-R was found to fit factor analytic models adhering to the
assumptions of unidimensionality and monotonicity. In addition, subscales were
mutually independent based on residual correlations. Nonparametric IRT reaffirmed
the finding of monotonicity. A highly constrained confirmatory factor analysis
model, which imposed equal factor loadings on all items, was found to fit the
data well and was used to estimate a 1-parameter IRT model. CONCLUSIONS: This
study provides evidence of the unidimensionality of the CRS-R and supports the
hierarchical structure of the CRS-R subscales, suggesting that it is an effective
tool for establishing diagnosis and monitoring recovery of consciousness after
severe traumatic brain injury.
CI - Copyright (c) 2014 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS