Antipsychotics and Risk of Hyperglycemic Emergencies

Inclusion Criteria: * Patients with a with a first-time prescription for an antipsychotic medication * Patients at least 18 years of age at cohort entry (except Alberta, Ontario, and Nova Scotia, where patients will be a least 66 years of age) * Patients with at least 1 year of history in the database Exclusion Criteria: * Patients aged \<18 years on the date of cohort entry (or \< 66 years in Alberta, Ontario and Nova Scotia) * Received a prescription for an antipsychotic medication in the 365 days prior to cohort entry * Patients who were hospitalized with the primary study outcome \<30 days prior to cohort entry * Had \<1 year of provincial Medicare or GPRD enrollment preceding cohort entry * Hospitalized for \>30 consecutive days in the 365 days prior to cohort entry * Received renal dialysis or palliative care in the 365 days prior to cohort entry * Patients in a long term care facility * Patients who received \>1 antipsychotic medication on the date of cohort entry