Table 1.

Categories of Causes of Death

Death Cause Group	Eligibility Criteria
Liver failure (other than liver cancer)	Selected ICD-10 codes: B15–B19 (viral hepatitis) B94.2 (sequelae of viral hepatitis) K70 (alcoholic liver disease) K71–K77 (toxic/chronic/other liver disease) T86.4 (liver transplant failure and rejection) Z94.4 (liver transplant status) OR Death identified as physically related to HCV infection according to information obtained at or after a SCCS visit
Liver cancer	Selected ICD-10 code: C22
Nonliver cancer	Selected ICD-10 codes: C00–C21, C23–C97 (all malignant neoplasms except liver cancer, including leukemia) D00–D48 (all in situ, benign, and unknown neoplasms)
Unnatural cause	Selected ICD-10 codes: S00–T88 except T86.4 (injury, poisoning, and certain other consequences of external cause) V01–Y98 (external causes of morbidity and mortality) Z92–Z99 except Z94.4 (health service–related factor) OR Death identified as due to accident, suicide, or overdose of narcotics according to the SCCS
Cardiovascular	Selected ICD-10 codes: I00–I99 (diseases of the circulatory system)
Other	All the deaths with selected ICD-10 code not entering any of the criteria described above
Unspecified	No selected ICD-10 code and no complementary information from the SCCS

Abbreviations: HCV, hepatitis C virus; ICD-10, International Classification of Diseases, 10th revision; SCCS, Swiss Hepatitis C Cohort Study.