Not all questions are created equal: the weight of the Oxford Knee Scores questions in a multicentric validation study.

"Declarations Ethical approval and consent to participateEthics approval was obtained from the local ethics committee in both centers (1286/2020 and 2021-2439-evBO) prior to conducting the study. Informed consent was obtained from every participant prior to inclusion in the study. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained by all participating patients. Consent for publicationConsent for publication was given by the all authors. Informed consentInformed consent was obtained from every participant prior to inclusion in the study. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained by all participating patients. Competing interestsT.G. declares personal fees paid during the conducting of the study outside the submitted work from Zimmer Biomet, Europe, Depuy Synthes Orthopädie Gmbh, Peter Brehm GmbH, and ImplanTec GmbH. T.H. declares paid presentations and research support from Smith&Nephew, ZimmerBiomet, and Implantcast, as well as paid consultancy for Smith&Nephew. All financial benefits have been received outside the submitted work. All other co-authors declare no financial support related or nonrelated to the study. Competing interests T.G. declares personal fees paid during the conducting of the study outside the submitted work from Zimmer Biomet, Europe, Depuy Synthes Orthopädie Gmbh, Peter Brehm GmbH, and ImplanTec GmbH. T.H. declares paid presentations and research support from Smith&Nephew, ZimmerBiomet, and Implantcast, as well as paid consultancy for Smith&Nephew. All financial benefits have been received outside the submitted work. All other co-authors declare no financial support related or nonrelated to the study."

"Funding The study was conducted without any funding or benefits from a commercial party."