Lower Extremity Functional Scale (LEFS): Difference between revisions
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'''Original Editor '''- Emily Hanson | '''Original Editor '''- Emily Hanson | ||
'''Top Contributors''' - {{Special:Contributors/{{FULLPAGENAME}}}} | '''Top Contributors''' - {{Special:Contributors/{{FULLPAGENAME}}}} | ||
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== Objective<br> == | == Objective<br> == | ||
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0. Extreme Difficulty or Unable to Perform Activity | 0. Extreme Difficulty or Unable to Perform Activity | ||
#Quite a Bit of Difficulty | #Quite a Bit of Difficulty | ||
#Moderate Difficulty | #Moderate Difficulty | ||
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<br> | <br> | ||
Video: how to score the LEFS <br> {{#ev:youtube|4CDhRMZCWQ4}} | Video: how to score the LEFS <br> {{#ev:youtube|4CDhRMZCWQ4}} | ||
== Evidence == | == Evidence == | ||
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=== Reliability === | === Reliability === | ||
Internal reliability for the LEFS is excellent (α=0.96). Test-retest reliability estimates were R=.86 (95% lower limit CI=.80) for the entire sample (n=98) and R=.94 (95% lower limit CI=.89) for the subset of patients with more chronic conditions (n=31).<ref name="Binkley et al." /><br> | Internal reliability for the LEFS is excellent (α=0.96). Test-retest reliability estimates were R=.86 (95% lower limit CI=.80) for the entire sample (n=98) and R=.94 (95% lower limit CI=.89) for the subset of patients with more chronic conditions (n=31).<ref name="Binkley et al." /><br> | ||
=== Validity === | === Validity === | ||
The LEFS is a valid tool as compared to the SF-36.<ref name="Binkley et al." /><br> | The LEFS is a valid tool as compared to the SF-36.<ref name="Binkley et al." /><br> | ||
=== Responsiveness === | === Responsiveness === | ||
The minimum detectable change (MDC) for the LEFS is 9 points. That is, a change of more than 9 points represents a true change in the patient's condition.<ref name="Binkley et al." /><br> | The minimum detectable change (MDC) for the LEFS is 9 points. That is, a change of more than 9 points represents a true change in the patient's condition.<ref name="Binkley et al." /><br> | ||
The minimum clinically important difference (MCID) for the LEFS is 9 points. That is, "Clinicians can be reasonably confident that a change of greater than 9 points is... a clinically meaningful functional change."<ref name="Binkley et al." /><br> | The minimum clinically important difference (MCID) for the LEFS is 9 points. That is, "Clinicians can be reasonably confident that a change of greater than 9 points is... a clinically meaningful functional change."<ref name="Binkley et al." /><br> | ||
The capacity of the LEFS to detect change in lower-extremity function appears to be superior to that of the SF-36 physical function subscale, as indicated by higher correlations with an external prognostic rating of change.<ref name="Binkley et al." /><br> | The capacity of the LEFS to detect change in lower-extremity function appears to be superior to that of the SF-36 physical function subscale, as indicated by higher correlations with an external prognostic rating of change.<ref name="Binkley et al." /><br> | ||
=== Miscellaneous<br> === | === Miscellaneous<br> === | ||
The LEFS has an error of +/- 5 points. That is, the tabulated score is within 5 points of a patient's "true" score.<ref name="Binkley et al." /><br> | The LEFS has an error of +/- 5 points. That is, the tabulated score is within 5 points of a patient's "true" score.<ref name="Binkley et al." /><br> | ||
<br> | |||
== Links == | == Links == | ||
[http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCoQFjAA&url=http%3A%2F%2Fwww.mccreadyfoundation.org%2Fdocuments%2FLEFS.pdf&ei=8Y_pTrvQEoG2tweXq8m9Cg&usg=AFQjCNHtb01y5m2yfn4VRNR-YDAZIux28Q Lower Extremity Functional Scale, from the McReady Foundation]<br> | [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCoQFjAA&url=http%3A%2F%2Fwww.mccreadyfoundation.org%2Fdocuments%2FLEFS.pdf&ei=8Y_pTrvQEoG2tweXq8m9Cg&usg=AFQjCNHtb01y5m2yfn4VRNR-YDAZIux28Q Lower Extremity Functional Scale, from the McReady Foundation]<br> | ||
== Recent Related Research (from [http://www.ncbi.nlm.nih.gov/pubmed/ Pubmed]) == | == Recent Related Research (from [http://www.ncbi.nlm.nih.gov/pubmed/ Pubmed]) == | ||
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== References == | == References == | ||
<references /><br> | <references /><br> | ||
[[Category:Outcome_Measures]] | |||
Revision as of 16:22, 13 March 2014
Original Editor - Emily Hanson
Top Contributors - Emily Hanson, Naomi O'Reilly, Kim Jackson, Evan Thomas, Admin, Vidya Acharya, Lucinda hampton, Disha Rupareliya, WikiSysop, Mandeepa Kumawat, Shaimaa Eldib and Rishika Babburu
Objective
[edit | edit source]
The objective of the Lower Extremity Functional Scale (LEFS) is to measure "patients' initial function, ongoing progress, and outcome" for a wide range of lower-extremity conditions.[1]
Intended Population
[edit | edit source]
The LEFS is intended for use on adults with lower extremity conditions.[1]
Method of Use[edit | edit source]
Example Questionnaire: Lower Extremity Functional Scale
The LEFS is a self-report questionnaire. Patients answer the question "Today, do you or would you have any difficulty at all with:" in regards to twenty different activities.[1] Patients select an answer from the following scale for each activity listed:
0. Extreme Difficulty or Unable to Perform Activity
- Quite a Bit of Difficulty
- Moderate Difficulty
- A Little Bit of Difficulty
- No Difficulty
The patient's score is tallied at the bottom of the page. The maximum possible score is 80 points, indicating very high function. The minimum possible score is 0 points, indicating very low function.
Video: how to score the LEFS
Evidence[edit | edit source]
Reliability[edit | edit source]
Internal reliability for the LEFS is excellent (α=0.96). Test-retest reliability estimates were R=.86 (95% lower limit CI=.80) for the entire sample (n=98) and R=.94 (95% lower limit CI=.89) for the subset of patients with more chronic conditions (n=31).[1]
Validity[edit | edit source]
The LEFS is a valid tool as compared to the SF-36.[1]
Responsiveness[edit | edit source]
The minimum detectable change (MDC) for the LEFS is 9 points. That is, a change of more than 9 points represents a true change in the patient's condition.[1]
The minimum clinically important difference (MCID) for the LEFS is 9 points. That is, "Clinicians can be reasonably confident that a change of greater than 9 points is... a clinically meaningful functional change."[1]
The capacity of the LEFS to detect change in lower-extremity function appears to be superior to that of the SF-36 physical function subscale, as indicated by higher correlations with an external prognostic rating of change.[1]
Miscellaneous
[edit | edit source]
The LEFS has an error of +/- 5 points. That is, the tabulated score is within 5 points of a patient's "true" score.[1]
Links[edit | edit source]
Lower Extremity Functional Scale, from the McReady Foundation
Recent Related Research (from Pubmed)[edit | edit source]
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