LAUSR

Background: Long-term sickness absence is a growing concern in Belgium and other European countries. Since 2017, Belgian physicians of the sickness funding organisations are required to assess the re-integration possibilities within the first two months of sickness absence. Given the shortage of physicians in the assessment of work disability and the growing number of people in sickness absence, there is a need for a triage tool, allowing to assign return-to work support to patients having a high-risk profile not to resume work. Methods/design: The current study comprises a comprehensive validation process of a screening tool that supports Belgian physicians in guiding people back to work. The study consists of a theoretical construct validation (face validity and content validity), and an empirical construct validation (concurrence validity, factorial validity, predictive validity, hypothesis testing validity and known- group validity). Expected impact of the study for Public Health: The screening instrument assessing the risk for long-term sickness absence is a tool developed to support physicians who work for sickness funds and for occupational health and safety organisations. Both professionals play an important role in the return to work process and the prevention of long-term sickness absence. The screening tool aims at making a distinction between people who will resume their work independently and people who will need support to do so. Generation of this prediction model will help physicians to focus effort and resources in the high-risk group. Results may also help understand the relationship between the biopsychosocial model and long-term sick-leave. Significance for public health In this research, we tested a generic instrument to screen for long-term sickness absence, regardless the cause of the sickness absence or the political context. Both biomedical factors and psychosocial factors (such as the patients’ own prediction) are questioned in the prediction model, which is thus adapted to the modern view on sick leave. A screening method to detect high risk of long-term sickness absence among the large group of sick employees might help to use resources (e.g. money, services) in a more efficient way. Physicians will be able to focus on patients with a high risk on long-term sick leave, and the return to work process of employees at high risk can start much earlier. The instrument will, next to the physicians’ prognosis, offer support in prioritizing patients’ files. Hence, a lot of patients will resume their work spontaneously. Patients who need support will experience shorter follow-up periods, and better quality of care. In addition, the relationship between predicting factors of the biopsychosocial model and long-term sickness absence will be examined.