if appropriate and coordinated followup is provided after discharges patients are not usually readmitted to hospital within days a high rate of unplanned readmissions is therefore an indicator of the quality of several dimensions of the mental health system in order to monitor quality of mental health care and mental health system performance unplanned day hospital readmission rates are used by organisations in various oecd countries such as the canadian institute for health information the care quality commission in the united kingdom and the national mental health performance monitoring system in the united states