Table 1

Comparison of baseline features, vessel wall geometries, and perioperative complications between the low residual stenosis group and the high residual stenosis group

≤50% (n=46)>50% (n=13)P value
Age, years, mean (SD)58.1 (12.24)58.9 (11.33)0.846
Male, n (%)34 (73.9)10 (76.9)0.999
Hypertension, n (%)31 (67.4)12 (92.3)0.152
Diabetes mellitus, n (%)13 (28.3)6 (46.2)0.377
Hyperlipidemia, n (%)28 (60.9)11 (84.6)0.206
Cigarette smoking, n (%)19 (41.3)6 (46.2)0.755
Qualifying events, n (%)0.143
 Transient ischemic attack21 (45.7)3 (23.1)
 Ischemic stroke25 (54.3)10 (76.9)
Qualifying arteries, n (%)0.515
 MCA15 (32.6%)7 (53.8%)
 Intracranial ICA5 (10.9%)0 (0)
 BA18 (39.1%)4 (30.8%)
 Intracranial VA8 (17.4%)2 (15.4%)
Time from the initial qualifying event to MR-VWI, days, median (IQR)55 (30–90)60 (30–75)0.917
Preprocedural stenosis, %, mean (SD)88.09 (1.60)89.23 (2.58)0.710
Lesion length, mm, median (IQR)6 (5–9)8 (6–10)0.347
Vessel wall geometries
 NWI, %, median (IQR)97.00 (95.22–97.30)99.00 (98.07–99.32)0.009
 NWTI, %, median (IQR)85.87 (81.79–88.03)93.42 (89.36–96.34)0.013
 RI, median (IQR)0.81 (0.74–0.94)0.72 (0.60–1.08)0.615
Periprocedural complication, n (%)
 Symptomatic cerebral infarction2 (4.3)1 (7.7)0.533
  • MCA, middle cerebral artery; ICA, internal carotid artery; BA, basilar artery; VA, vertebral artery; MR-VWI, magnetic resonance vessel wall imaging; NWI, normalized wall index; NWTI, normalized wall thickness index; RI, remodeling index.