Identification of low-effort patients through dynamometry

Area of Science:

• Rehabilitation Medicine
• Neurology
• Orthopedics

Background:

• Detecting patients who exert low effort during grip evaluations is crucial for accurate diagnosis.
• Existing methods for assessing maximal grip strength require further refinement.
• The five-rung grip test and rapid exchange grip test are commonly used but need validation for effort assessment.

Purpose of the Study:

• To further define and validate the five-rung grip test for assessing maximal grip effort.
• To introduce and evaluate the rapid exchange grip test for detecting low effort.
• To develop a model for categorizing patients into sincere or low-effort groups based on grip test performance.

Main Methods:

• Data were collected from four subject groups: sincere normals, normals feigning low effort, sincere patients, and patients suspected of low effort.
• Both the five-rung grip test and the rapid exchange grip test were administered to all subjects.
• Statistical analysis focused on the standard deviation of the five-rung grip test and peak scores from both tests.

Main Results:

• The standard deviation of the five-rung grip test successfully predicted group membership (sincere vs. low effort).
• No significant difference in peak scores was found between the five-rung and rapid exchange grip tests in sincere subjects.
• A significant difference in peak scores was observed between the two tests in the low-effort groups.

Conclusions:

• The developed model effectively categorizes patients into low-effort or sincere effort groups.
• Grip test analysis, particularly the five-rung grip test's standard deviation, can identify individuals exerting submaximal effort.
• These findings enhance the ability to accurately assess grip strength in clinical settings.