The structure of functional and community outcomes following traumatic brain injury.

Objectives: To investigate the dimensionality of functional and community outcomes following serious TBI. To identify items that fit, misfit or are redundant, as well as to assess person misfit.

Methods: Rating-scale (Rasch) analysis was applied to 1-year follow-up data from 231 cases in the US National TBI Model Systems database.

Scaling of the revised Oswestry low back pain questionnaire.

Objective: To evaluate the measurement properties of the Revised Oswestry Disability Questionnaire (RODQ) by using rating scale analyses.

Design: Calibration of item responses by using a data set.

Setting: Four outpatient therapy clinics in the northeastern United States.

Assessing functional status: exploring the relationship between the multiple sclerosis functional composite and driving.

Objective: To explore the relationship between the Multiple Sclerosis Functional Composite (MSFC), which is comprised of 3 clinical dimensions (arm and hand function, leg function and ambulation, cognition), and an everyday functional skill, driving performance.

Design: Cohort study.

Setting: Medical rehabilitation research organization.