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Pinch force sense test-retest reliability evaluation using contralateral force matching task.

Lin Li¹, Shuwang Li²

¹Department of Physical Education, Renmin University of China, No. 59 Zhongguancun Street, Beijing, 100872, China.

Scientific Reports

|January 11, 2024

Summary

This study found that the contralateral force matching task offers fair to good test-retest reliability for assessing pinch force sense. Reliability is better at lower reference force levels, indicating its clinical utility.

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Area of Science:

Rehabilitation Medicine
Neuroscience
Biomechanics

Background:

Accurate assessment of pinch force sense is crucial for longitudinal clinical studies.
The contralateral matching task is a common method for evaluating force sense, but its test-retest reliability needs further investigation.
Existing research has limited data on the reliability of pinch force sense using the contralateral matching task.

Purpose of the Study:

To evaluate the test-retest reliability of pinch force sense using a contralateral force matching task.
To examine reliability across different reference force levels: 10%, 30%, and 50% of maximum voluntary isometric contraction (MVIC).

Main Methods:

Participants performed pinch force sense tests twice, one week apart.
The contralateral matching task was employed for assessments.
Intraclass correlation coefficient (ICC), normalized constant error (NCE), and normalized absolute error (NAE) were calculated to determine reliability.

Main Results:

Normalized constant error (ICC: 0.76-0.85) and normalized absolute error (ICC: 0.61-0.81) indicated fair to good reliability.
Normalized variable error showed poor reliability (ICC: -0.25 to 0.05).
Lower reference force levels (10% MVIC) demonstrated better reliability metrics (lower SEM and MDD95%) compared to higher levels (30% and 50% MVIC).

Conclusions:

The contralateral force matching task provides fair to good test-retest reliability for pinch force sense assessment.
Reliability is influenced by the reference force level, with lower levels yielding more consistent results.
These findings support the use of the contralateral matching task in clinical settings for monitoring changes in pinch force sense over time.