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Authors
Wedderkopp, Niels https://orcid.org/0000-0002-9660-6618
Wang, Chinchin
Steele, Russell https://orcid.org/0000-0003-1071-0914
Hebert, Jeff
Rexen, Christina https://orcid.org/0000-0003-0301-9922
Jespersen, Eva https://orcid.org/0000-0002-8942-4816
Junge, Tina https://orcid.org/0000-0002-3304-3010
Thomsen, Tobias
Jensen, Frederik Mølgaard
Shrier, Ian https://orcid.org/0000-0001-9914-3498
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Funding
Funding for this research was provided by:
Nordea-fonden (02-2011-‐3679)
TrygFonden
IMK Almene Fond
Region Syddanmark
Team Danmark
University College Lillebaelt Department of Physiotherapy
University of Southern Denmark
The Danish Chiropractic Research Foundation
The Municipality of Svendborg
Canadian Institutes of Health Research
University of Southern Denmark
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Article History
Accepted: 14 September 2025
First Online: 3 November 2025
Declarations
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: None of the authors have at any time had any type of conflicting or competing interests, neither through previous or future employment, financial or non-financial, directly or indirectly related to the work submitted for publication.
: NW conceived the idea of the study, performed the final analyses, and wrote the submitted manuscript. CW, IS, and RS assisted in preparing and cleaning the data, setting up the database, and with statistical advice. TJ, EJ, and CR collected the data and set up the primary database. TT and FMJ wrote the first draft of the manuscript and performed the preliminary analyses. JH and IS helped in developing the original idea, helped with analyses, and helped revise the original manuscript. All authors read and approved the final version.
: Data are available from the CHAMPS Study Steering Committee upon reasonable request. Legal and ethical restrictions apply. Interested parties may contact Professor Niels Wedderkopp (nwedderkopp@health.sdu.dk), and the following information will be required at the time of application: a description of how the data will be used, securely managed, and permanently deleted. In addition a Data Processing Agreement in accordance with “The General Data Protection Regulation (Regulation (EU) 2016/679)”.
