Table 2.

Differences in serum GDF-15 levels between patients and normal subjects (IU/L).

Detection index	n	GDF-15	AFP
Patients with liver cancer	40	22.47 ± 7.49∗∗	31.53 ± 8.85∗∗
Normal person	40	3.01 ± 0.54	3.44 ± 1.92

Note: compared with normal people, ^∗P < 0.05, ^∗∗P < 0.01.