Table 4.

Cox regression of the hazard ratio of the outcome among near-occlusions among the five candidate parameters for novel definitions of full collapse. The outcome was preoperative recurrent ipsilateral ischemic stroke or ipsilateral retinal artery occlusion within 28 days of presenting event

Near-occlusion parameter	HR (95%CI)	p
Stenosis diameter (per 1 mm increment)	0.44 (0.07–2.53)	0.35
Distal ICA diameter (per 1 mm increment)	0.51 (0.34–0.77)	0.001
ICA ratio (per 0.1 increment)	0.76 (0.64–0.91)	0.03
ECA ratio (per 0.1 increment)	0.86 (0.77–0.96)	0.009
Stenosis PSV (per 1 m/s increment)	1.11 (0.80–1.56)	0.53

ECA external carotid artery, HR hazard ratio, ICA internal carotid artery, PSV peak systolic velocity