Generic patient-reported questionnaire scoring lower-limb function in daily activities.
The LEFS is a self-report outcome measure in which patients rate their perceived difficulty with 20 everyday tasks involving the lower limb, each scored 0-4, summed to a total out of 80 (or converted to a percentage), with higher scores indicating better function. It was designed as a generic lower-extremity measure rather than one tied to a specific joint or diagnosis.
It gives clinicians a quick, patient-reported functional baseline and a way to track meaningful change over an episode of care, which supports decisions about progressing rehab, timing discharge, or return to activity. Because it isn't joint-specific, it allows comparison of functional status across patients with different lower-limb problems using one consistent tool.
Patients complete the questionnaire independently, typically at intake and at intervals through treatment or post-surgery, rating difficulty with tasks such as walking, climbing stairs, squatting, and standing. Scores are compared over time against the published minimal detectable change/minimal clinically important difference (often cited as around 9 points) to judge whether observed change is likely real and clinically meaningful rather than measurement noise.
Because it is generic rather than pathology-specific, it may be less sensitive to change in a particular condition than a joint- or disease-specific tool such as the KOOS or IKDC, and ceiling effects can occur in higher-functioning or athletic populations. It also relies on patient self-report and recall, so it can be influenced by pain, mood, or motivation on the day, and single-timepoint scores should be interpreted alongside objective measures rather than in isolation.
This guide was auto-drafted and is pending editorial review.