Table 5.

Weighted mean analysis of duplex ultrasound

Criteria	Weighted mean		Studies (n)	Carotids (n)
	Sensitivity (%)	Specificity (%)
Duplex – PSV > 50% stenosis	85.1	86.4	8	3271
Duplex – PSV >70% stenosis	85.8	84.5	20	3329
Duplex – PSV >70% stenosis (Consensus ONLY)	92.4	87.9	5	902
Duplex – PSV > 70% stenosis (narrowed consensus ONLY)	82.8	87	8	1366
Duplex – EDV > 70% stenosis	91.7	72	3	436
Duplex – EDV + PSV > 70% stenosis	97.3	94.2	4	1337
Duplex – > 60% stenosis	97.7	79.3	3	630
Duplex – >80% stenosis	85.5	90.2	3	4439

EDV, end diastolic velocity; PSV, peak systolic velocity.