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Table 7: 
Validation of eTCCD in comparison with DSA by analyzing the sensitivities, specificities, and positive and negative predictive values of the distinct arterial segments
SegmentSensitivitySpecificityPPVNPV
M187 (81–94)98 (96–99)92 (87–97)96 (94–98)
M276 (62–87)100 (100–100)100 (91–100)95 (92–97)
C184 (75–91)99 (99–100)97 (90–100)96 (94–98)
A177 (71–84)97 (94–99)94 (91–98)85 (81–89)
A270 (35–93)100 (100–100)100 (59–100)99 (97–100)
P174 (64–83)99 (98–100)96 (88–99)92 (89–95)
P277 (64–88)99 (98–100)93 (81–99)96 (94–98)
PComA91 (81–97)79 (68–88)78 (66–87)92 (82–97)
AComA94 (86–98)86 (42–100)98 (92–100)60 (26–88)
V478 (64–89)99 (97–100)92 (79–98)96 (93–98)
BA76 (50–93)99 (97–100)87 (60–98)97 (94–100)
  • Note:—PPV indicates positive predictive value; NPV, negative predictive value; PComA, posterior communicating artery; AComA, anterior communicating artery; M1/M2, M1-/M2-segment of the middle cerebral artery; C1, C1-segment of the internal carotid artery; A1/A2, A1-/A2-segment of the anterior cerebral arteries; P1/P2, P1-/P2-segment of the posterior cerebral artery; V4, V4-segment of the vertebral artery; BA, basilar artery; eTCCD, echo-enhanced transcranial color-coded duplex sonography; DSA, digital subtraction angiography. The displayed values refer to the datasets obtained by both reviewers. All values are shown as percentages. Numbers in parentheses represent 95% confidence intervals.