caa a22 4500 606180540 CHVBK 20210128100806.0 cr unu---uuuuu 210128e20150201xx s 000 0 eng 10.1007/s11136-014-0777-6 doi (NATIONALLICENCE)springer-10.1007/s11136-014-0777-6 The German Lower Extremity Functional Scale (LEFS) is reliable, valid and responsive in patients undergoing hip or knee replacement [Elektronische Daten] [Florian Naal, Franco Impellizzeri, Sebastian Torka, Vanessa Wellauer, Michael Leunig, Rüdiger von Eisenhart-Rothe] 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 6months 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 6months. 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. Springer International Publishing Switzerland, 2014 Lower Extremity Functional Scale nationallicence German version validation nationallicence Total hip replacement nationallicence Osteoarthritis nationallicence Knee arthroplasty nationallicence Outcome score nationallicence Naal Florian Department of Orthopaedic Surgery, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Strasse 22, 81675, Munich, Germany aut Impellizzeri Franco Department of Research and Development, Schulthess Clinic, Zurich, Switzerland aut Torka Sebastian Department of Orthopaedic Surgery, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Strasse 22, 81675, Munich, Germany aut Wellauer Vanessa Department of Research and Development, Schulthess Clinic, Zurich, Switzerland aut Leunig Michael Department of Orthopaedic Surgery, Schulthess Clinic, Zurich, Switzerland aut von Eisenhart-Rothe Rüdiger Department of Orthopaedic Surgery, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Strasse 22, 81675, Munich, Germany aut Quality of Life Research Springer International Publishing 24/2(2015-02-01), 405-410 0962-9343 24:2<405 2015 24 11136 https://doi.org/10.1007/s11136-014-0777-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 brief-communication jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11136-014-0777-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Naal Florian Department of Orthopaedic Surgery, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Strasse 22, 81675, Munich, Germany aut NATIONALLICENCE 700 1- Impellizzeri Franco Department of Research and Development, Schulthess Clinic, Zurich, Switzerland aut NATIONALLICENCE 700 1- Torka Sebastian Department of Orthopaedic Surgery, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Strasse 22, 81675, Munich, Germany aut NATIONALLICENCE 700 1- Wellauer Vanessa Department of Research and Development, Schulthess Clinic, Zurich, Switzerland aut NATIONALLICENCE 700 1- Leunig Michael Department of Orthopaedic Surgery, Schulthess Clinic, Zurich, Switzerland aut NATIONALLICENCE 700 1- von Eisenhart-Rothe Rüdiger Department of Orthopaedic Surgery, Klinikum rechts der Isar, Technical University of Munich, Ismaninger Strasse 22, 81675, Munich, Germany aut NATIONALLICENCE 773 0- Quality of Life Research Springer International Publishing 24/2(2015-02-01), 405-410 0962-9343 24:2<405 2015 24 11136