Accepted: 16 February 2023
First Online: 11 March 2023
: Tialda Hoekstra, Henk-Jan Boersema, Femke Abma, and Sandra Brouwer declare that they have no conflict of interest.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000. This is an observational study, and therefore approval by a Medical Ethical Committee is not necessary under Dutch law, as the study is not subject to the Medical Research Involving Human Subjects Act (WMO). The METc UMC Groningen has confirmed that no ethical approval is required.
: Register data were anonymized and provided by UWV, and UWV gave permission to use the data for the current study.