Table 3

Comparison of Doppler sonography (as "gold standard/benchmark") for the detection of abnormal findings in the internal jugular veins and in azygos vein/vertebral veins using other noninvasive and invasive imaging techniques
Doppler sonography # of positive cases Noninvasive and invasive imaging techniques # of positive cases Total # of cases Sensitivity
IJV right 19 20 MRV IJV right 7 20 36.8
CV IJV right 11 57.9
IVUS IJV right 10 52.6
CV + IVUS IJV right 13 68.4
IJV left 19 19 MRV IJV left 7 20 36.8
CV IJV left 14 19 73.7
IVUS IJV left 15 18 83.3
CV + IVUS IJV left 18 18 NA*
IJVs total 20 20 MRV IJV total 8 20 40
CV IJV total 17 85
IVUS IJV total 18 90
CV + IVUS IJV total 20 NA*
VVs total 7 20 MRV VV total 3 20 28.6
CV azygos total 10 28.6
IVUS azygos total 17 85.7
CV + IVUS azygos total 18 85.7

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

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