Test-retest reliability on nine tasks of the Physical Work Performance Evaluation

Area of Science:

• Occupational Health
• Rehabilitation Medicine
• Ergonomics

Background:

• Functional capacity evaluations (FCEs) are crucial for assessing injured workers' return-to-work potential.
• The Physical Work Performance Evaluation (PWPE) is an FCE tool with existing research on its validity and interrater reliability.
• Test-retest reliability of the PWPE has not been extensively studied.

Purpose of the Study:

• To evaluate the test-retest reliability of specific tasks within the Physical Work Performance Evaluation (PWPE).
• To assess the consistency of PWPE scores for injured workers in a vocational rehabilitation setting.

Main Methods:

• The study involved 24 clients with stable physical injuries undergoing vocational rehabilitation.
• Nine key tasks of the PWPE were assessed twice for each participant.
• Data analysis included kappa scores and percent agreement to determine reliability.

Main Results:

• Substantial test-retest reliability was found for kneeling, lifting floor to waist, bilateral carrying, and pushing tasks.
• Moderate reliability was observed for standing and repetitive squatting tasks.
• Factors such as self-limiting behavior, pain score changes, and movement adjustments impacted scoring consistency.

Conclusions:

• The PWPE demonstrates acceptable test-retest reliability for several critical work-related tasks.
• Understanding factors influencing score variability is essential for accurate functional capacity assessment.
• Further research may refine PWPE protocols to enhance reliability in clinical practice.