Table 3 The sensitivity, specificity, positive predictive value, and negative predictive value of the sonographic findings for target diagnoses
From: Earlier point-of-care ultrasound, shorter length of stay in patients with acute flank pain
Sonographic finding | PoCUS† time (min) | Sensitivity‡, % | Specificity‡, % | PPV†‡, % | NPV†‡, % | |
|---|---|---|---|---|---|---|
Urolithiasis (n = 503) | Unilateral hydronephrosis | ≤120 | 86.4 (83.0,89.7) | 83.0 (78.8,87.1) | 86.6 (83.2,89.9) | 82.7 (78.6,86.9) |
> 120 | 86.0 (79.2,92.8) | 76.5 (66.4,86.6) | 84.3 (77.3,91.4) | 78.8 (68.9,88.7) | ||
Pyelonephritis (n = 130) | Normal kidney* | ≤120 | 63.0 (53.5,72.5) | 69.4 (65.7,73.0) | 24.9 (19.6,30.2) | 92.1 (89.6,94.5) |
> 120 | 56.7 (38.9,74.4) | 74.6 (67.4,81.9) | 32.7 (19.9,45.4) | 88.8 (83.1,94.5) | ||
Myofascial pain (n = 127) | Normal kidney* | ≤120 | 100 (100,100) | 77.5 (74.1,80.8) | 43.9 (37.7,50.1) | 100 (100,100) |
> 120 | 100 (100,100) | 77.9 (71.2,84.5) | 36.5 (23.5,49.6) | 100 (100,100) |