Table 4

Comparison of magnetic resonance venography (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
MRV # of positive cases Noninvasive and invasive imaging modalities # of positive cases Total # of cases Sensitivity Specificity PPV NPV OR
IJV right 7 CV IJV right 11 20 35 53.8 45.5 77.8 2.92 (.41-20.89)
IVUS IJV right 10 71.4 34.8 25 80 4 (.55-29.09)
CV + IVUS IJV right 13 71.4 38.5 38.5 71.4 1.56 (.22-11.37)
IJV left 7 CV IJV left 14 19 57.1 23.1 28.6 50 .40 (.06-2.89)
IVUS IJV left 15 18 100 27.3 46.7 100 1.88 (1.17-3.01)
CV + IVUS IJV left 18 18 NA* NA* NA* NA* NA*
IJVs total 8 CV IJV total 17 20 75 8.3 35.3 33.3 .27 (.02-3.67)
IVUS IJV total 18 100 16.7 44.4 100 1.8 (1.19-2.72)
CV + IVUS IJV total 20 100 0 0.4 --- ---
VVs total 3 CV azygos total 10 20 0 41.2 0 70 .7 (.47-1.05)
IVUS azygos total 17 100 17.6 17.6 100 1.21 (.97-1.51)
CV + IVUS azygos total 18 100 11.8 16.7 100 1.20 (.98-1.48)

Legend: MRV - magnetic resonance venography; IJVs - internal jugular veins; VVs - vertebral veins; DS - Doppler sonography: MRV - magnetic resonance venography; CV - catheter venography; IVUS - intravascular ultrasound; OR - odds ratio.

Nineteen and 18 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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