Table 1.

Comparison of baseline clinical characteristics based on D-dimer

	Cases (n)	D-dimer (μg/ml)	P-value	D-dimer (μg/ml)	P-value
		(mean ± SD)		≤ 0.5 (n) > 0.5 (n)
Age (years)			0.802		0.591
≤60	198	0.87 ± 0.98		140 58
>60	139	0.84 ± 1.00		102 37
Gender			0.384		0.441
Female	43	0.74 ± 1.06		33 10
Male	294	0.88 ± 0.98		209 85
Tumor length (cm)			0.241		0.958
≤ 3.0	88	0.75 ± 0.78		63 25
> 3.0	249	0.90 ± 1.05		179 70
Tumor location			0.786		0.696
Upper/Middle	176	0.84 ± 0.95		128 48
Lower	161	0.87 ± 1.04		114 47
Vessel invasion			0.739		0.835
Negative	279	0.87 ± 1.02		201 78
Positive	58	0.82 ± 0.81		41 17
Differentiation			0.740		0.513
Well/Moderate	269	0.87 ± 1.00		191 78
Poor	68	0.82 ± 0.92		51 17
T stage			0.358		0.290
T1-2	114	0.79 ± 0.94		86 28
T3-4	223	0.89 ± 1.01		156 67
N stage			0.820		0.584
N0	180	0.87 ± 0.98		127 53
N1-3	157	0.85 ± 1.00		115 42