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The Patient-Specific Functional Scale: validity in workers' compensation claimants.

Douglas P Gross¹, Michele C Battié, Alexander K Asante

¹Department of Physical Therapy, University of Alberta, Edmonton, AB, Canada. dgross@ualberta.ca

Archives of Physical Medicine and Rehabilitation

|June 7, 2008

Summary

The Patient-Specific Functional Scale (PSFS) shows construct and predictive validity for assessing functional limitations in workers' compensation claimants, aiding in recovery prediction.

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Area of Science:

Rehabilitation Science
Occupational Health
Clinical Measurement

Background:

The Patient-Specific Functional Scale (PSFS) is a patient-reported outcome measure.
Its validity in workers' compensation populations requires examination.
Understanding functional limitation is crucial for return-to-work outcomes.

Purpose of the Study:

To evaluate the construct and predictive validity of the PSFS.
To determine if PSFS scores can predict recovery and timely return to work in injured workers.

Main Methods:

Prospective cohort study over 1 year with 294 workers' compensation claimants.
Baseline measures included PSFS, Pain Disability Index (PDI), and SF-36.
Analysis involved correlation and regression models.

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Main Results:

PSFS demonstrated moderate construct validity, correlating with PDI and SF-36 physical function.
PSFS showed negligible correlation with SF-36 mental health components.
Higher baseline PSFS scores predicted delayed recovery and return to work.

Conclusions:

The PSFS is a valid measure for assessing functional limitation in this population.
PSFS scores provide predictive value for recovery timelines.
Findings support the use of PSFS in workers' compensation settings.