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Reliability of torque range of motion: a preliminary study
D Breger-Lee1, E T Voelker, D Giurintano
1U.S. Public Health Service Hospital, Gillis W. Long Hansen's Disease Center, Carville, Louisiana.
Summary
This study assessed the clinical reliability of torque range of motion (TROM) measurements. Results indicate moderate intrarater reliability, with higher consistency at greater force levels, but significant differences between raters and instruments.
Area of Science:
- Orthopedics
- Biomechanics
- Rehabilitation Medicine
Background:
- The clinical reliability of torque range of motion (TROM) has not been established.
- Accurate range of motion measurements are crucial for assessing joint function and guiding treatment.
Purpose of the Study:
- To determine the intra- and interrater reliability of TROM measurements.
- To evaluate the consistency of TROM measurements across different force levels and instruments.
Main Methods:
- 14 healthy subjects (56 digits) were tested using TROM.
- Extension forces of 200g, 400g, 600g, and 800g were applied to proximal interphalangeal joints.
- Measurements were taken using manual (dial goniometer) and digital (force transducer/electrogoniometer) instruments by three independent teams.
Main Results:
- Significant differences were found between raters (p < 0.0001) and instruments at higher forces (p < 0.01).
- Moderate intrarater reliability was observed between trials and instruments.
- Intraclass correlation coefficients (ICCs) mirrored Pearson correlations.
- Higher agreement was noted at 600g and 800g force levels, with tester B showing significantly higher agreement than testers A and C.
Conclusions:
- TROM demonstrates moderate intrarater reliability, particularly at higher forces.
- Interrater reliability and instrument consistency require further investigation due to observed significant differences.
- These findings highlight variability in TROM measurements, impacting its clinical utility.