Table 1:

Exclusion criteria

Exclusion criterion	Definition
Spontaneous clearance	Negative HCV RNA test result 12 mo after positive HCV antibody test result and no record of positive HCV RNA test result within 12 mo after first positive test result
Acute resolved	Negative HCV RNA test result within 12 mo after positive HCV RNA test result and no record of HCV-related treatment between testing dates (Appendix 2, Supplemental Table S3, available at www.cmajopen.ca/content/9/3/E897/suppl/DC1) The person never reverted to HCV RNA positive
HIV infection	Record in Ontario HIV database HIV diagnostic code in administrative data (Appendix 2, Supplemental Table S1)
HBV infection	Positive HBV test result in Public Health Ontario testing records HBV diagnostic code in administrative data (Appendix 2, Supplemental Table S1)