ENPP2 and hepatocellular carcinoma: The HR values for elevated ATX level ranged from 6.38 (95% CI: 1.83–22.31; p = 0.004) in the AFP model to 10.50 (95% CI: 2.60–42.49; p = 0.001) in the HA model, indicating that patients with high ATX had a substantially increased risk of HCC recurrence.