Table 2.

Clinical characteristics of the patients

Clinical Variable	Discovery Cohort (n = 107)	Internal Testing Cohort (n = 107)	P value
Sex
Male	92	91	1b
Female	14	15
Age, y
Median (range)	51(71-27)	50 (77-21)	0.6054a
ALT
Negative (≤50 U/L)	67	57	0.2097b
Positive (>50 U/L)	39	49
Tumor size
Large(>5cm)	31	43
Small(≤5cm)	74	63	0.1245b
No data	1	0
TNM stage
I	47	42
II	37	39	1c
III-IV	22	25
AFP
Low	56	59
High	50	44	0.6117b
No data	0	3

AFP, α-fetoprotein; ALT, alanine transferase; ^a Unpaired t test; ^b chi-squared test (χ2 test); ^c wilcoxon rank sum test.