Schizophrenia typically has a fluctuating course; rehospitalisation is common. We studied associations between discharge variables and subsequent two-year rehospitalisation rates.

Using a New Zealand national database, we obtained rehospitalisation rates and bed days for 451 patients with schizophrenia discharged from three inpatient facilities between July 2009 and December 2011.

Nearly half (44%) of the cohort were rehospitalised within two years. Patients over 50 were less likely [hazard ratio (HR) = 0.58, 95% confidence interval (CI) = 0.35–0.97, p = 0.04] to be rehospitalised. Patients whose index admission included compulsory treatment appeared more likely (HR = 1.3, 95% CI = 0.98–1.71, p = 0.06) to be rehospitalised and spent longer rehospitalised (p = 0.05). Those whose index admission was three weeks or longer were less likely (HR = 0.53, 95% CI = 0.39–0.72, p = 0.001) to be rehospitalised. Antipsychotic types, routes and dosages were not significantly associated with rehospitalisation rate, except for those prescribed clozapine (HR = 0.61, 95% CI = 0.41–0.89, p = 0.01).

Rehospitalisation rates were higher for patients under the age of 50 and those with shorter index admissions; the latter finding requires further study. Other than the beneficial effect of clozapine, the type and route of prescribed antipsychotics did not significantly affect rehospitalisation rates.