| Cluster 1 (n = 463) | Cluster 2 (n = 341) | Cluster 3 (n = 353) | P value |
---|---|---|---|---|
Segments of different plaque types | ||||
 Calcified plaque | 2.43 ± 2.46 | 1.79 ± 1.96a | 1.72 ± 1.98a |  < 0.001 |
 Mixed plaque | 2.24 ± 2.59 | 2.81 ± 2.78a | 3.02 ± 2.84a |  < 0.001 |
 Noncalcified plaque | 0.40 ± 0.78 | 0.50 ± 0.95 | 0.63 ± 1.02a |  < 0.001 |
Segments with different degrees of stenosis | ||||
 Minimal stenosis | 2.13 ± 1.78 | 1.81 ± 1.58 | 2.00 ± 1.70 | 0.069 |
 Mild stenosis | 1.91 ± 2.05 | 1.89 ± 1.84 | 1.99 ± 2.01 | 0.619 |
 Moderate stenosis | 0.72 ± 1.48 | 0.89 ± 1.58 | 0.91 ± 1.57a | 0.020 |
 Severe stenosis | 0.26 ± 0.91 | 0.48 ± 1.43 | 0.40 ± 1.09a | 0.021 |
 Non obstructive stenosis | 4.06 ± 2.47 | 3.71 ± 2.21 | 4.02 ± 2.34 | 0.189 |
 Obstructive stenosis | 0.98 ± 2.00 | 1.37 ± 2.45a | 1.32 ± 2.17a | 0.003 |
 Involved vessels | 2.60 ± 1.07 | 2.64 ± 1.09 | 2.73 ± 1.03 | 0.275 |
 SIS | 5.04 ± 3.05 | 5.08 ± 3.10 | 5.34 ± 3.05 | 0.278 |
 SSS | 9.14 ± 7.96 | 10.18 ± 9.24 | 10.35 ± 8.51 | 0.121 |
Patient level | ||||
 Patients with calcified plaques | 352(76.0%) | 242(71.0%) | 232(65.7%)a | 0.005 |
 Patients with mixed plaque | 315(68.0%) | 265(77.7%)a | 272(77.1%)a | 0.002 |
 Patients with noncalcified plaque | 121(26.1%) | 106(31.1%) | 141(39.9%)a,b |  < 0.001 |
 Obstructive disease | 149(32.2%) | 140(41.1%)a | 151(42.8%)a | 0.003 |
 Involved vessels ≥ 3 | 255(55.1%) | 193(56.6%) | 208(58.9%) | 0.546 |
 SIS ≥ 4 | 289(62.4%) | 211(61.9%) | 233(66.0%) | 0.458 |
 SSS ≥ 6 | 268(57.9%) | 205(60.1%) | 214(60.6%) | 0.693 |