Number of individuals with any mental health or addictions hospital readmissions* within (≤) 30 days following the incident hospital discharge

Notes:
 
 1. Separately report the number of individuals who died and re-admitted during the follow-up period overall in all years.
 2. Calculate within (≤) 30 days acute care re-admission proportion following the index MH&A hospital discharge date (i.e. Count only one visit per IKN per 30 day follow-up period).
 3. Reason for re-admission can be for a different MH&A reason than the initial MH&A diagnosis.
 4. Incident discharges are restricted to calendar years but 30 day follow-up for readmission can cross over into the next calendar year.
 
Exclusions  (apply to both numerator and denominator):
 
 5. Invalid IKN
 6. Non-Ontario resident (1st two characters of PRCDDA ne ‘35’)
 7. Missing sex
 8. Age < 16, > 105
 9. Adults who die within 30 days of discharge (based on RPDB)

Total number of incident mental health or addictions hospital discharges between calendar years of interest

Incident = 1stevent in a calendar period without any look-back for past events (If multiple hospital visits in CY, use first). Keep only one discharge per IKN per year.
 
Age ranges to include: >16, <=105
 
Exclude:
 
 1. Patients without a valid health insurance number
 2. Patients without an Ontario residence
 3. Gender not recorded as male or female
 4. or Age > 105
 5. Invalid date of birth, admission date/time, discharge date/time
 6. Individuals who die within 30 days of discharge (based on RPDB) before a follow-up or outcome occurs (i.e. a person dies before they have been readmitted or is readmitted but dies before they are discharged)
 
Note: For OMHRS records if admission to an institution or occurs within 24 hours of discharge from institution then this should be considered as part of the same episode of care.