Table 2 Comparison of carotid plaque features between patients with and without ACI
|  | Mean ± SD, or n (%) | p | |
|---|---|---|---|
Patients with ACI (n = 196) | Patients without ACI (n = 491) | ||
Plaque morphology | |||
 Lumen area, mm2 | 45.3 ± 15.2 | 44.4 ± 14.9 | 0.443 |
 Wall area, mm2 | 35.4 ± 11.6 | 32.5 ± 11.0 | 0.002 |
 Total vessel area, mm2 | 80.7 ± 19.5 | 77.0 ± 20.7 | 0.016 |
 Mean wall thickness, mm | 1.3 ± 0.5 | 1.2 ± 0.4 | 0.007 |
 Normalized wall index, % | 44.2 ± 10.7 | 42.6 ± 9.3 | 0.122 |
 Luminal stenosis, % | 26.4 ± 40.0 | 16.1 ± 27.5 | 0.058 |
 a Plaque volume, mm3 | 722.5 ± 475.3 | 667.3 ± 426.9 | 0.320 |
Presence of plaque compositions | |||
 Calcification | 101 (51.5) | 247 (50.3) | 0.772 |
 Fibrous cap rupture | 18 (9.2) | 40 (8.1) | 0.659 |
 LRNC | 148 (75.5) | 380 (77.4) | 0.597 |
 All IPH | 42 (21.4) | 76 (15.5) | 0.062 |
 Fresh IPH | 22 (11.2) | 38 (0.8) | 0.804 |
 Recent IPH | 8 (0.4) | 23 (0.5) | 0.185 |
 Both two types of IPH | 12 (0.6) | 15 (0.3) | 0.274 |
b Size of plaque compositions | |||
 Volume of calcification, mm3 | 37.1 ± 76.2 | 38.7 ± 51.8 | 0.194 |
 % calcification volume, % | 3.3 ± 4.2 | 4.0 ± 4.0 | 0.046 |
 Volume of LRNC, mm3 | 166.5 ± 243.9 | 113.4 ± 153.7 | 0.083 |
 % LRNC volume, % | 14.9 ± 14.2 | 12.1 ± 11.1 | 0.105 |
 Volume of IPH, mm3 | 164.9 ± 200.5 | 71.4 ± 67.7 | 0.006 |
 % IPH volume, % | 12.1 ± 10.5 | 7.0 ± 5.9 | 0.014 |