AFP and hepatocellular carcinoma: In contrast, when AFP-low HCC was compared to control, AAG had AUC (0.96, 95% CI: 0.94-0.99) better than DCP (0.87, 95% CI: 0.81-0.93; P < 0.01) indicating that AAG was more predictive of AFP-low HCC than of AFP-high HCC.