Table 3.  D-dimer testing in the DS and DUS groups.

D-dimer	DS group (n = 70)		P value	DUS group (n = 44)		P value
	VTE+(n = 9)	VTE−(n = 61)		VTE+(n = 13)	VTE−(n = 31)
At admission	17.6 ± 26.9	13.1 ± 24.6	0.191	11.3 ± 12.4	9.6 ± 21.5	0.136
1 day	9.3 ± 5.5	5.9 ± 8.4	0.035*	5.9 ± 2.9	4.8 ± 8.7	0.022*
3 days	10.2 ± 8.2	3.9 ± 4.2	0.002*	6.7 ± 4.4	2.2 ± 2.2	<0.001*
5 days	12.1 ± 5.3	4.2 ± 3.7	0.001*	9.3 ± 5.5	3.0 ± 2.5	<0.001*
7 days	11.9 ± 7.2	4.3 ± 3.3	0.001*	13.5 ± 8.2	3.3 ± 2.7	<0.001*
14 days	10.1 ± 3.7	3.7 ± 3.4	<0.001*	7.1 ± 5.3	3.1 ± 2.6	0.004*

*Mann-Whitney U-test, P < 0.05. Data are shown as mean ± S.D.