Table 2.

Sensitivity, specificity and likelihood ratio for the presence of hydronephrosis; comparing bedside renal point-of-care ultrasound to non-contrast computed tomography

Overall population
Sensitivity: 75.8% (95% CI: 69.5–81.4)	Positive Likelihood Ratio: 1.69 (95% CI: 1.32–2.16)
Specificity: 55.2% (95% CI: 44.1–65.8)	Negative Likelihood Ratio: 0.43 (95% CI: 0.32–0.59)
Mild Hydronephrosis
Sensitivity: 58.33% (95% CI: 44.88%–70.93%)	Positive Likelihood Ratio: 1.49 (95% CI: 1.05–2.10)
Specificity: 60.76% (95% CI: 49.12%–71.56%)	Negative Likelihood Ratio: 0.68 (95% CI: 0.48–0.97)
Moderate Hydronephrosis
Sensitivity: 64.93% (95% CI: 53.21%–75.46%)	Positive Likelihood Ratio: 4.54 (95% CI: 2.34–8.81)
Specificity: 85.71% (95% CI: 73.78%–93.62%)	Negative Likelihood Ratio: 0.41 (95% CI: 0.30–0.65)