Comparison between intracranial collaterals and cerebral hemodynamics in patients with extracranial carotid stenosis versus combined extra- and intracranial stenosis using transcranial duplex

Table 3 Difference in NIHSS between the two groups

NIH	MRA						T test
NIH	Extracranial stenosis			Intracranial and extracranial stenosis			T	P value
Range	2	–	12	8	–	18	− 4.440	< 0.001*
Mean ± SD	8.333	±	2.795	12.733	±	2.631	− 4.440	< 0.001*