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Gepubliceerd in: Quality of Life Research 2/2015

01-02-2015 | Brief Communication

The German Lower Extremity Functional Scale (LEFS) is reliable, valid and responsive in patients undergoing hip or knee replacement

Auteurs: Florian D. Naal, Franco M. Impellizzeri, Sebastian Torka, Vanessa Wellauer, Michael Leunig, Rüdiger von Eisenhart-Rothe

Gepubliceerd in: Quality of Life Research | Uitgave 2/2015

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Abstract

Purpose

To determine the measurement properties of a German version of the Lower Extremity Functional Scale (LEFS) in patients with hip or knee osteoarthritis undergoing total joint replacement (TJR).

Methods

This prospective cohort study included 486 consecutive patients. The LEFS and other self-reported outcome measures were administered at different time points and several classical measurement properties were determined.

Results

The German LEFS was highly reliable (ICC 0.98) and internally consistent (CA 0.95). Construct validity was proven by large to very large correlations (r = 0.52–0.91) with all other instruments in the expected directions. Factor analysis using a polychoric correlation matrix revealed two factors at baseline and 6 months explaining about 70 % of the total variance. There were no floor or ceiling effects for the total score, but significant floor effects for the single items 16–19 at baseline. The LEFS was highly responsive at 6 months.

Conclusions

The German LEFS proved to be a reliable, valid and responsive tool for the self-assessment of patients undergoing total hip or knee replacement. Nevertheless, the questionnaire seems to summarize more than one construct as highlighted by the factor analysis. Further research seems therefore warranted.
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Metagegevens
Titel
The German Lower Extremity Functional Scale (LEFS) is reliable, valid and responsive in patients undergoing hip or knee replacement
Auteurs
Florian D. Naal
Franco M. Impellizzeri
Sebastian Torka
Vanessa Wellauer
Michael Leunig
Rüdiger von Eisenhart-Rothe
Publicatiedatum
01-02-2015
Uitgeverij
Springer International Publishing
Gepubliceerd in
Quality of Life Research / Uitgave 2/2015
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-014-0777-6

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