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Table 3 Statistical data for carotid bruits

From: Carotid bruits as predictor for carotid stenoses detected by ultrasonography: an observational study

 

Grade of Carotid US Stenosis

Carotid Bruits (yes/no)

50–69%

70–99%

100%

50–99%

Positive Likelihood Ratio

1.16

2.62

0.51

3.65

Negative Likelihood Ratio

0.85

0.33

1.51

0.36

Positive Likelihood Percent

14%

62%

-95%

73%

Negative Likelihood Percent

15%

67%

-51%

64%

  1. 291 patients (582 cervical sides) had data regarding the degree of carotid stenosis seen on carotid US and presence or absence of a carotid bruit recorded in their medical records. With the US examination as gold standard the likelihood ratios and the likelihood percentages for carotid bruits were calculated with the hypothesis that all separate stenosis groups are the only ones that produce a bruit in each case. How to calculate likelihood percentages is presented in the appendix.
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BMC Neurology

ISSN: 1471-2377

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