Funding for this research was provided by:
Region Örebro län (None)
Örebro Universitet (None)
Received: 5 August 2019
Accepted: 6 February 2020
First Online: 16 March 2020
Ethics approval and consent to participate
: Approved 28/01/2002 and 05/05/2003, Regional Scientific Ethics Committee at Region Örebro County, Örebro, Sweden (from 01/01/2019 this ethics committee is included in the Swedish Ethical Review Authority, Box 2110, SE-750 02 Uppsala, Sweden, Tel: + 46 (0)10 475 08 00; Email: ExternalRef removed), refs: Dnr 500:16, 1180/01, Dnr 500:16, 161/03. Written informed consent was obtained from all participants after oral and written information was provided.
: Not applicable.
: LAN has a patent relating to the device used for the step-up height assessments described in the manuscript, but has no financial relationship with any company or organisation. JK works as an independent consultant in biostatistics. He declares no conflicts of interest. The other authors declare that they have no competing interests.