|Comparison of Doppler sonography and magnetic resonance venography (combined as the "gold standard/benchmark") for the detection of abnormal findings in the internal jugular veins and in azygos vein/vertebral veins using other invasive imaging techniques|
|DS + MRV||# of positive cases||Noninvasive and invasive imaging modalities||# of positive cases||Total # of cases||Sensitivity|
|IJV right||19||CV IJV right||11||20||57.9|
|IVUS IJV right||10||52.6|
|CV + IVUS IJV right||13||68.4|
|IJV left||20||CV IJV left||14||19||73.7|
|IVUS IJV left||15||18||83.3|
|CV + IVUS IJV left||18||18||NA*|
|IJVs total||20||CV IJV total||17||20||85|
|IVUS IJV total||18||90|
|CV + IVUS IJV total||20||NA*|
|VVs total||8||CV azygos total||10||20||25|
|IVUS azygos total||17||87.5|
|CV + IVUS azygos total||18||87.5|
Legend: IJV(s) - internal jugular vein(s); VVs - vertebral veins; MRV - magnetic resonance venography; CV - catheter venography; IVUS - intravascular ultrasound.
Nineteen and18 patients successfully obtained CV and IVUS in the left IJV, respectively (because of difficulty to access with the wire). All 20 patients successfully obtained other noninvasive and invasive examinations in the explored vein territories. Therefore, for the left IJVs comparisons with CV and IVUS, only data from 19 and 18 patients were used.
*The SPSS does not provide an estimate of odds ratio or its confidence interval whenever there is a zero count in the contingency table. Instead, it returns an estimate of relative risk. Therefore those results are reported as "not available".
Zivadinov et al.
Zivadinov et al. BMC Neurology 2013 13:151 doi:10.1186/1471-2377-13-151