Table 2 Test characteristics of a negative “ultrasonic ureteral crossing sign” in proximal ureteral calculi.

From: Rapid localization of ureteral calculi in patients with renal colic by “ultrasonic ureteral crossing sign”

 

Proximal ureteral calculi

Distal ureteral calculi

Ultrasonic ureteral crossing sign (−)

164

24

Ultrasonic ureteral crossing sign (+)

5

240

  1. CI, confidence interval; LR, likelihood ratio.
  2. Sensitivity = 97% (95% CI [93.2, 99]); Specificity = 91% (95% CI [86.8, 94.1]); AUC = 0.94(0.91–0.96).
  3. Positive Predictive Value = 87% (95% CI [82.3, 90.9]); Negative Predictive Value = 98% (95% CI: [95.3, 99.1]).
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