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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: J Hepatol. 2020 Nov 24;74(4):850–859. doi: 10.1016/j.jhep.2020.11.023

Table 3.

Distribution of categorization of USS scans and serum AFP tests during the 0–4 years prior to index date.

Controls Cases
USS
All USS 201 133
Definitely screening 148 (73.6%) 81 (60.9%)
Probably screening 1 (0.5%) 2 (1.5%)
Probably not screening 8 (4.0%) 8 (6.02%)
Definitely not screening 40 (19.9%) 38 (28.6%)
Unable to determine 4 (2.0%) 4 (3.0%)
AFP
All AFP 382 193
Definitely screening 314 (82.2%) 143 (74.1)
Probably screening 2 (0.5%) 6 (3.1)
Probably not screening 1 (0.3%) 7 (3.6%)
Definitely not screening 57 (15%) 31 (16.1%)
Unable to determine 8 (2.1%) 6 (3.1%)

Abbreviations: USS – ultrasound, AFP – alpha fetoprotein