Validity and internal consistency of the American Orthopaedic Foot and Ankle Society Midfoot Scale in patients with Lisfranc injury |
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| Institution: | 1. University of Tampere, School of Medicine, Tampere 33520, Finland;2. Department of Orthopaedics and Traumatology, University of Tampere, Faculty of Medicine and Life Sciences and Tampere University Hospital, Teiskontie 35, Tampere, PL2000, 33521, Finland;3. Department of Surgery, Central Finland Central Hospital, Jyväskylä, Finland;4. COXA Hospital for Joint Replacement, Biokatu 6, Tampere 33520, Finland;1. Ninewells Hospital, Dundee, DD1 9SY, United Kingdom;2. St Bernards Hospital, Harbour View Road, Gibraltar;1. Department of Orthopedic and Trauma Surgery, Martin-Luther-University Halle-Wittenberg, Ernst-Grube Str. 40, 06120 Halle Germany;2. Department for Anatomy and Cell Biology, Martin Luther University, Halle Wittenberg, Große Steinstraße 52, 06108 Halle, Germany;3. Department of Prosthodontics, School of Dental Medicine Martin-Luther-University Halle-Wittenberg Magdeburger Str. 16, 06108 Halle Germany;1. Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore;2. Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore;3. Department of Orthopaedic Surgery, Mount Elizabeth Hospital, Singapore, Singapore;1. Beth Israel Deaconess Medical Center, Boston, MA, USA;2. WakeMed Health and Hospitals, Raleigh, NC, USA;3. American Orthopaedic Foot & Ankle Society, Rosemont, IL, USA;4. Pontificia Univesidad Catolica de Chile, Santiago, Chile;5. Cedars-Sinai Medical Center, Los Angeles, CA, USA;6. Geisinger Commonwealth School of Medicine, Scranton, PA, USA;1. The J. Vernon Luck, Sr., M.D. Orthopaedic Research Center, Orthopaedic Institute for Children, in Alliance with UCLA, 403 W. Adams Blvd., Los Angeles, CA 90007, United States;2. University of Southern California Department of Biomedical Engineering, Los Angeles, CA, United States;3. University of California, Los Angeles Department of Orthopaedic Surgery, Los Angeles, CA, United States;4. Los Angeles County Harbor—UCLA Medical Center, Los Angeles, CA, United States |
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| Abstract: | BackgroundThe American Orthopaedic Foot and Ankle Society (AOFAS) Midfoot Scale is an extensively used outcome measure instrument for evaluating outcomes after foot and ankle surgery or trauma.MethodsIn total, 117 patients with Lisfranc injury completed the AOFAS Midfoot Scale and the Visual Analogue Scale Foot and Ankle (VAS-FA) instruments. Internal consistency (correlation between different items), floor and ceiling values, convergent validity, item threshold distribution, and the coverage (item difficulty) of the AOFAS Midfoot scale were tested.ResultsAOFAS Midfoot Scale had high convergent validity and acceptable internal consistency (Cronbach’s alpha >0.70). The ceiling effect was confirmed. The person-item distribution indicated that the scale had a lack of coverage and targeting in our sample.ConclusionsOur data suggests that the AOFAS Midfoot Scale has acceptable validity and internal consistency. However, due to the lack of coverage and targeting, it should not be the primary outcome measure to be used to evaluate the outcomes after Lisfranc injury in the future studies. |
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| Keywords: | Outcome Measure AOFAS VAS-FA Midfoot Lisfranc |
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