Interrater agreement and sensitivity and specificity in differentiating near occlusion from moderate stenosis using various criteria and combinations

CriteriaInterrater AgreementSensitivity (%)Specificity (%)
Delayed time of contrast arrival0.4637.593.8
Direct or indirect evidence of collaterals0.7175.093.8
ICA to ICA comparison of diameter reduction0.7575.090.6
ICA to ECA comparison of diameter reduction0.8384.493.8
One criterion present0.7690.684.4
Two or more criteria present0.8890.693.8
Three or more criteria present0.7259.496.9
Four criteria present0.6131.396.9
ICA to ICA or ICA to ECA comparison of diameter reduction0.8490.690.6
ICA to ICA and ICA to ECA comparison of diameter reduction0.7868.893.8
  • Note.—ICA indicates internal carotid artery; ECA, external carotid artery.