title: Translation and testing of measurement properties of the Swedish version of the IKDC subjective knee form.
abstract: To translate to Swedish language and cross-culturally adapt the IKDC-SKF and to test the measurement properties of the Swedish version of IKDC-SKF in ACL-injured patients undergoing reconstruction surgery.The translation and cross-cultural adaption was performed according to guidelines. Seventy-six patients with an ACL injury filled out the IKDC-SKF and other questionnaires before ACL reconstruction and at 4, 6, and 12 months after surgery. A total of 203 patients from the Swedish ACL Registry participated at 8 months post-operative. Measurement properties were tested according to the COnsensus-based Standards for the selection of health Measurement INstruments (COSMIN) guidelines.The Swedish IKDC-SKF had high internal consistency (Cronbach's alpha=0.90) and test-retest reliability (ICC2,1=0.92, CI 95%: 0.81-0.97, P<.001). A single factor solution accounted for 46.1% of the variance in IKDC-SKF scores. Criterion validity was moderate to high. All ten predefined hypotheses for hypothesis testing were confirmed. The six hypotheses for responsiveness testing were confirmed. The effect size was 1.8, the standardized response mean was 1.9, the and minimal clinically important difference was 13.9 points.The Swedish version of the IKDC-SKF had good measurement properties and can be recommended for use in a population of ACL-deficient patients undergoing ACL reconstruction.
authors.affiliation: Rorelse och Halsa, Primary Healthcare Rehabilitation, Region Ostergotland, Sweden.|Division of Physiotherapy, Department of Medical and Health Sciences, Linkoping University, Linkoping, Sweden.
authors.forename: H
authors.identifier: http://orcid.org/0000-0002-1793-2133
authors.initials: H
authors.lastname: Tigerstrand Grevnerts
authors.affiliation: Department of Physical Therapy, University of Delaware, Newark, DE, USA.
authors.forename: K
authors.initials: K
authors.lastname: Grävare Silbernagel
authors.affiliation: Division of Physiotherapy, Department of Medical and Health Sciences, Linkoping University, Linkoping, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Sonesson
authors.affiliation: Division of Physiotherapy, Department of Medical and Health Sciences, Linkoping University, Linkoping, Sweden.|Aspetar Orthopaedic & Sports Medicine Hospital, Doha, Qatar.
authors.forename: C
authors.identifier: http://orcid.org/0000-0001-8102-3631
authors.initials: C
authors.lastname: Ardern
authors.affiliation: Division of Physiotherapy, Department of Medical and Health Sciences, Linkoping University, Linkoping, Sweden.|Centre for Clinical Research Sormland, Uppsala University, Eskilstuna, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Österberg
authors.affiliation: Orthopaedic Department, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Gauffin
authors.affiliation: Division of Physiotherapy, Department of Medical and Health Sciences, Linkoping University, Linkoping, Sweden.
authors.forename: J
authors.initials: J
authors.lastname: Kvist
mesh_terms: D005260:Female; D006304:Health Status; D006305:Health Status Indicators; D006801:Humans; D007718:Knee Injuries / Q000503:physiopathology*; D008297:Male; D010147:Pain Measurement / Q000592:standards; D011594:Psychometrics; D011795:Surveys and Questionnaires / Q000592:standards*; D013548:Sweden; D014177:Translations
keywords: ACL injury; ACL reconstruction; knee surgery; patient reported outcome