Table 2.
Pooled diagnostic performance in acute cholecystitis for the rapid and delayed imaging protocols. US, abdominal ultrasound. HIDA, hepatobiliary scintigraphy. CT, abdominal computed tomography without contrast.
| Statistic | Ultrasound (n = 134) | HIDA (n = 55) | CT (n = 39) |
|---|---|---|---|
| Sensitivity | 32 % | 85 % | 73 % |
| Specificity | 80 % | 86 % | 94 % |
| Positive likelihood ratio | 1.61 | 6 | 12.36 |
| Negative likelihood ratio | 0.85 | 0.17 | 0.30 |
| Disease prevalence | 44 % | 49 % | 56 % |
| Positive predictive value | 56 % | 85 % | 94 % |
| Negative predictive value | 60 % | 86 % | 72 % |
| Accuracy | 59 % | 86 % | 82 % |