Effectiveness of community mental health nursing on psychiatric hospitalisations in Switzerland: a mirror-image analysis

This is the first study to show a reduction in psychiatric hospitalisations after participation in community mental health nursing services in Switzerland. However, this effect was not confirmed in the sensitivity analysis which may suggest a regression to the mean effect. The study demonstrates the feasibility of using linked routine data to evaluate real-world mental health interventions and underscores the need for broader data coverage and improved documentation to strengthen future research.