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Calculated test characteristics assuming all non-diagnostic bedside ultrasound studies were deemed negatives at the bedside.
| Test characteristics | Values (95% CI) |
|---|---|
| Sensitivity | 72% (56–84%) |
| Specificity | 81% (70–89%) |
| Positive predictive value | 72% (56–84%) |
| Negative predictive value | 81% (72–89%) |
| Positive likelihood ratio | 3.86 (2.29–6.51) |
| Negative likelihood ratio | 0.35 (0.22–0.55) |
