Table 2.

Summary of piercing test results with 0.015-in probe.

Lesion	Piercing force ± SEM (N subsamples)	Fold difference	P value
Patient 1
Thrombus	0.38 ± 0.08 N (20)	5.05	<.001
Intima	1.90 ± 0.21 N (21)
Patient 2
Thrombus	–	–	–
Intima	1.56 ± 0.32 N (6)
Patient 3
Thrombus	0.15 ± 0.02 N (8)	15.43	<.001
Intima	2.27 ± 0.29 N (10)
Patient 4
Thrombus	0.37 ± 0.06 N (18)	7.84	.023
Intima	2.88 ± 0.59 N (4)
Patient 5
Thrombus	–	–	–
Intima	0.75 ± 0.27 N (9)
Patient 6
Thrombus	0.11 ± 0.03 N (8)	20.45	<.001
Intima	2.35 ± 0.18 N (31)
Patient 7
Thrombus	–	–	–
Intima	1.70 ± 0.24 N (15)
Patient 8
Thrombus	0.15 ± 0.03 N (2)	5.09	–
Intima	0.78 (1)
Patient 9
Thrombus	–	–	–
Intima	0.95 ± 0.16 (24)

SEM, standard error of the mean.