Database	Description	Use in Current Study
Canadian Institute for Health Information–Discharge Abstract Database	Demographic, administrative, and clinical data for hospital discharges (inpatient acute, chronic, and rehabilitation) and day procedures	Gout diagnosis for patient selection No. hospital stays and associated costs
Home Care Database (HCD) Resident	Demographic, administrative, and some clinical and service data for everyone receiving services from Community Care Access Centres in Ontario	No. home care services received and associated costs
National Ambulatory Care Reporting System	Administrative, clinical, financial, and demographic data for ambulatory care visits	Gout diagnosis for patient selection No. emergency department visits and associated costs
Ontario Drug Benefit (ODB) Program	Drugs for those over 65 years, on social assistance, and residents of longterm care	Gout medication for patient selection No. claims for select medications and associated costs
Ontario Health Insurance Program (OHIP)	Claims data for physician and other health professional insured services in Ontario, covering about 95% of the population	Gout diagnosis for patient selection No. primary and secondary care visits and associated costs
Ontario Registered Persons Database	Personal and demographic data for all current and previous registrants of OHIP	Patient profiling Patient eligibility and censoring