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Table 2: Imaging features of the study population
Variables All Patients (n = 175) First-Time Stroke Group (n = 100) Recurrent-Stroke Group (n = 75) P Value^{^a}
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.