Lower Extremity Functional Scale PDF - Overview
The Lower Extremity Functional Scale (LEFS) is a questionnaire containing 20 questions about a person’s ability to perform everyday tasks. The LEFS can be used by clinicians as a measure of patients’ initial function, ongoing progress and outcome, as well as to set functional goals.
The LEFS can be used to evaluate the functional impairment of a patient with a disorder of one or both lower
extremities. It can be used to monitor the patient over time and to evaluate the effectiveness of an
Interpretation of scores
- The lower the score the greater the disability.
- The minimal detectable change is 9 scale points.
- The minimal clinically important difference is 9 scale points.
- % of maximal function = (LEFS score) / 80 * 100 Performance:
- The potential error at a given point in time was +/- 5.3 scale points.
- Test-retest reliability was 0.94.
- Construct reliability was determined by comparison with the SF-36. The scale was found to be reliable
with a sensitivity to change superior to the SF-36