“…For employer size, the evidence is inconsistent (Jansen et al, 2021). Some studies found that working for a large employer is positively associated with RTW, retention, or continued employment (Hannerz et al, 2012;Prang et al, 2016;Schneider et al, 2016;van Ooijen et al, 2021); others found that working for a smaller employer is positively associated with early RTW or continued employment, or that small workplaces had lower entry into certified absence (Faucett et al, 2000;Krause et al, 2001;Holm et al, 2007;Markussen et al, 2011); or no association was found at all (Cooper et al, 2013;Høgelund and Holm, 2014;Bacon and Hoque, 2022). The inconsistent evidence can probably be partially explained by different definitions of employer sizes between studies, as definitions can vary according to national standards.…”