Table 2

Vessel wall characteristics of HRMRI between patients with MMD and AS-MMV before PSM

Patient groupsInter-reader agreement
(Cohen’sκ)
Intrareader agreement
(Cohen’sκ)
All cases
(n=1173)
MMD
(n=881)
AS-MMV (n=292)P value
Involvement of arteries
 ICA946 (80.6%)689 (78.2%)257 (88.1%)<0.001
 MCA1142 (97.4%)851 (96.6%)291 (99.7%)0.002
 ACA952 (81.2%)699 (79.3%)253 (86.6%)0.006
 PCA513 (43.7%)385 (43.7%)128 (43.8%)1.000
Outer diameter of ICA2.69±0.542.28±0.533.96±0.57<0.001
Outer diameter of MCA2.06±0.621.68±0.623.21±0.63<0.001
Eccentric wall thickening345 (29.4%)70 (7.9%)275 (94.2%)<0.0010.830.92
Heterogeneity of signal326 (27.8%)89 (10.1%)237 (81.2%)<0.0010.750.84
Vessel wall enhancement491 (41.9%)343 (38.9%)148 (50.7%)<0.0010.790.89
  • ACA, anterior cerebral artery; AS-MMV, atherosclerosis-associated moyamoya vasculopathy; HRMRI, high-resolution MRI; ICA, internal carotid artery; MCA, middle cerebral artery; MMD, moyamoya disease; PCA, posterior cerebral artery; PSM, propensity score matching.