Table 2 IVUS measurements
|  | NR group (N = 81) | IR/PR group (N = 62) | P value |
|---|---|---|---|
Lesion site | |||
 EEM CSA (mm2) | 12.54 ± 4.39 | 16.50 ± 4.51 | < 0.001 |
 Lumen CSA (mm2) | 3.91 ± 1.73 | 4.08 ± 1.76 | 0.564 |
 P&M CSA (mm2) | 8.63 ± 3.50 | 12.42 ± 4.04 | < 0.001 |
 Plaque burden (%) | 68.08 ± 10.04 | 74.71 ± 8.62 | < 0.001 |
Eccentricity index | 0.77 ± 0.20 | 0.74 ± 0.20 | 0.423 |
Eccentric lesion, n (%) | 70 (86.4) | 54 (87.1) | 0.906 |
Proximal reference | |||
 EEM CSA (mm2) | 15.67 ± 4.67 | 15.63 ± 3.76 | 0.949 |
 Lumen CSA (mm2) | 10.44 ± 3.62 | 9.75 ± 3.19 | 0.241 |
 P&M CSA (mm2) | 5.31 ± 2.97 | 5.87 ± 2.67 | 0.245 |
 Plaque burden (%) | 31.80 ± 16.39 | 35.88 ± 17.03 | 0.150 |
Distal reference | |||
 EEM CSA (mm2) | 14.32 ± 6.70 | 14.34 ± 4.76 | 0.983 |
 Lumen CSA (mm2) | 9.07 ± 3.28 | 9.05 ± 4.06 | 0.983 |
 P&M CSA (mm2) | 4.79 ± 3.65 | 5.29 ± 3.42 | 0.404 |
 Plaque burden (%) | 31.81 ± 15.68 | 35.81 ± 19.52 | 0.176 |
Plaque composition | |||
 Soft, n (%) | 18 (22.2) | 19 (32.3) | 0.178 |
 Fibrous, n (%) | 45 (55.6) | 33 (53.2) | 0.782 |
 Calcific (< 90°), n (%) | 13 (16.0) | 7 (11.3) | 0.416 |
 Mixed, n (%) | 5 (6.3) | 3 (4.8) | 0.718 |