Relationship between subjectively-rated and objectively-tested physical function across six different medical...

Area of Science:

• Rehabilitation Medicine
• Physical Therapy
• Health Outcomes Research

Background:

• Assessing physical function is crucial for rehabilitation outcomes.
• Self-rated questionnaires and objective tests offer different perspectives on physical function.
• Understanding the relationship between these measures is key for accurate patient evaluation.

Purpose of the Study:

• To quantify and compare the associations between self-rated and tested measures of physical function.
• To investigate these relationships across diverse patient diagnoses undergoing rehabilitation.

Main Methods:

• Six longitudinal cohort studies involving patients with whiplash, low back pain, fibromyalgia, lipoedema, lymphoedema, and post-acute coronary syndrome.
• Physical function assessed using the Short-Form 36 Physical Functioning (SF-36 PF) scale and the 6-Minute Walk Distance (6MWD) test.
• Correlation coefficients and ratios were used to compare the two measures at baseline and for changes over time.

Main Results:

• Moderate to strong correlations (up to r=0.791) were observed between SF-36 PF and 6MWD at baseline.
• Weaker correlations (up to r=0.408) were found for changes in scores during follow-up.
• The ratio of SF-36 PF to 6MWD varied, influenced by pain and mental health status.

Conclusions:

• Significant correlations exist between self-rated and tested physical function measures, though they weaken longitudinally.
• Pain and mental health significantly impact the interpretation of physical function assessments.
• A combined approach using both self-rated (SF-36 PF) and tested (6MWD) measures is recommended for comprehensive physical function evaluation in clinical practice and research.