Journal of Cancer Prevention

eISSN 2288-3657
pISSN 2288-3649

Frequency of operational definitions used in studies
Operational definition Liver
cancer
Hepatocellular carcinoma Hepatobiliary cancer Intrahepatic bile duct carcinoma Frequency
C22 33 5 1 39
International Classification of Diseases code (no specific subcode) 8 4 4 16
No specific definition 3 3 2 1 9
C22.0 8 8
C22 with V193 3 1 1 5
C22, C22.0, C22.9 3 3
C22.0, C22.9 2 2
C22.1 2 2
C22.0–C22.9 2 2
C22.1–C22.4 2 2
C22.0, C22.1, C24 1 1
C22.0, C22.1, C22.9 1 1
C22, C22.0, C22.1 1 1
C22 and liver cancer-related death 1 1
Hospitalized with C22 1 1
Hospitalized with C22, C22.0, C22.1 1 1
3 outpatients or 1 hospitalized with C22 1 1
3 outpatients or 1 hospitalized with C22.0 or C22.9 1 1
C22.0 with surgery or other therapy 1 1
Initiation of Hepatocellular carcinoma treatment 1 1
Total 57 29 9 3 98
J Cancer Prev 2023;28:47~52 https://doi.org/10.15430/JCP.2023.28.2.47
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