Table 1.

Administrative Databases

Database	Description
Ontario Cancer Registry	Population‐based database with approximately 95% of all provincial cancer diagnoses captured
Ontario Health Insurance Plan	Contains all billing claims for physician services and certain other health professionals (including fee codes for chemotherapy administration)
Canadian Institute for Health Information Discharge Abstract Database	Contains demographic, administrative, and clinical data related to hospital admissions (including the provision of intensive care unit care)
National Ambulatory Care Reporting System	Contains information on ambulatory care visits (including emergency department care)
Home Care Database	Contains information on government‐funded care at home
Registered Persons Database	Contains basic demographics and dates of death for all Ontario residents eligible for Ontario Health Insurance coverage