Percentage reduction of inpatient admissions by acute general psychiatric day care in individual facilities (i.e. feasibility rate of acute day care) seems to be an important parameter for service planning. Previously reported feasibility rates showed significant variation, however, and were based on eligibility criteria defined for randomized controlled trials.
This paper aims to perform an in-depth exploration of the calculation method of these feasibility rates, to propose different calculation methods expanding research definitions to the reality of service provision, and to analyze the association between the availability of residential services in regional mental health service systems and these rates.