Imaging features of the study population
| Variables | All Patients (n = 175) | First-Time Stroke Group (n = 100) | Recurrent-Stroke Group (n = 75) | P Valuea |
|---|---|---|---|---|
| Culprit plaque features on high-resolution vessel wall imaging | ||||
| Plaque area (median) (IQR) (mm2) | 5.8 (3.7–7.5) | 5.8 (3.5–7.4) | 5.7 (4.2–7.8) | .40 |
| Plaque burden (median) (IQR) (%) | 74.6 (55.9–87.9) | 72.9 (54.9–85.6) | 75.0 (60.6–89.9) | .26 |
| Plaque volume (median) (IQR) (mm3) | 45.8 (31.3–67.7) | 41.3 (27.6–60.2) | 50.7 (34.3–74.6) | .006 |
| Arterial remodeling ratio (median) (IQR) | 1.2 (1.0–1.5) | 1.2 (1.0–1.5) | 1.2 (1.0–1.5) | .83 |
| Positive remodeling (No.) (%) | 122 (69.7) | 70 (70.0) | 52 (69.3) | .92 |
| Eccentric index (median) (IQR) | 0.6 (0.4–0.7) | 0.6 (0.4–0.7) | 0.6 (0.4–0.7) | .54 |
| Eccentricity (No.) (%) | 110 (62.9) | 61 (61.0) | 49 (65.3) | .56 |
| Intraplaque hemorrhage (No.) (%) | 59 (33.7) | 35 (35.0) | 24 (32.0) | .68 |
| Degree of stenosis (median) (IQR) (%) | 44.7 (31.3–63.6) | 44.1 (30.7–59.8) | 46.8 (32.6–71.8) | .23 |
| Enhancement ratio (median) (IQR) | 1.6 (1.3–2.0) | 1.6 (1.2–2.0) | 1.6 (1.3–1.9) | .89 |
| Plaque No. of each patient | ||||
| Total plaque No. (median) (IQR) | 4 (3–6) | 4 (2–5) | 5 (4–7) | <.001 |
| Enhanced plaque No. (median) (IQR) | 2 (1–4) | 2 (1–3) | 3 (2–4) | .003 |
| Hypoperfusion volume (median) (IQR) (mL) | 0 (0–17.4) | 0 (0–24.5) | 0 (0–15.4) | .67 |
| Hypoperfusion intensity ratio (median) (IQR) | 0 (0–0) | 0 (0–0) | 0 (0–0) | .94 |
| Hypoperfusion (No.) (%) | 55 (31.4) | 29 (29.0) | 26 (34.7) | .42 |
↵a Comparison between recurrent-stroke group and first-time stroke groups.