Table 1.

Separate estimation of cutoff values along with sensitivity and specificity in vertebrobasilar arteries

	Right vertebral a.	Left vertebral a.	Basilar a.
MFV cutoff point (cm/s)	12.50	20.50	18.00
Sensitivity	0.63	0.60	0.74
Specificity	0.30	0.73	0.88
EDV cutoff point (cm/s)	4.31	11.40	9.75
Sensitivity	0.88	0.60	0.80
Specificity	0.40	0.73	0.89