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Sensitivity and specificity of the functional hallux limitus test to predict foot function
Craig Payne1, Vivienne Chuter, Kathryn Miller
1Department of Podiatry, School of Human Biosciences, La Trobe University, Bundoora, Victoria 3083, Australia.
Summary
Functional hallux limitus, a condition often without symptoms, can lead to compensatory issues. A clinical test shows moderate accuracy in identifying this condition when abnormal midtarsal joint function occurs during gait.
Area of Science:
- Podiatry
- Biomechanics
- Orthopedics
Background:
- Functional hallux limitus is an underrecognized condition.
- It often presents without direct symptoms but can cause compensatory biomechanical changes.
- These changes can lead to symptomatic presentations.
Purpose of the Study:
- To evaluate the diagnostic accuracy of a clinical test for functional hallux limitus.
- To determine the sensitivity and specificity of the test in predicting abnormal midtarsal joint function during gait.
Main Methods:
- A clinical assessment of the first metatarsophalangeal joint's range of motion was performed.
- The first ray was stabilized to isolate joint movement.
- Eighty-six feet were assessed for functional hallux limitus and abnormal midtarsal joint pronation during late midstance.
Main Results:
- The clinical test demonstrated a sensitivity of 0.72.
- The test showed a specificity of 0.66.
- These values indicate moderate predictive capability.
Conclusions:
- The clinical test for functional hallux limitus has moderate diagnostic accuracy.
- Clinicians should consider functional hallux limitus in patients exhibiting late midstance pronation of the midtarsal joint during gait.
- This finding aids in diagnosing gait abnormalities potentially linked to foot biomechanics.