therefore the proportion of patients readmitted to hospital within days has been used and collected by the oecd as an indicator of the lack of proper management of mental health conditions outside of hospital oecd a whilst there are some limitations with regards to this data including the small number of countries able to distinguish between planned and unplanned readmissions to hospital this can be a useful indicator oecd b unplanned readmissions to the same hospital for schizophrenia and bipolar disorder in norway are quite high