Table 3.
Results—Performance of prehospital and on-admission shock index (SI ≥ 1 and SI ≥ value with the best Youden’s index) in the detection of hypofibrinogenemia <1.5 g.L−1.
| Shock Index | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | Accuracy (95% CI) |
|---|---|---|---|---|---|
| Prehospital SI ≥ 1 | 0.50 (0.19–0.81) | 0.88 (0.83–0.92) | 0.15 (0.08–0.27) | 0.98 (0.96–0.99) | 0.87 (0.82–0.90) |
| Prehospital SI ≥ 0.92 | 0.73 (0.39–0.94) | 0.82 (0.76–0.86) | 0.15 (0.11–0.26) | 0.99 (0.99–0.99) | 0.81 (0.76–0.86) |
| Admission SI ≥ 1 | 0.30 (0.07–0.65) | 0.94 (0.91–0.97) | 0.19 (0.07–0.41) | 0.97 (0.95–0.98) | 0.92 (0.88–0.95) |
| Admission SI ≥ 0.8 | 0.80 (0.44–0.97) | 0.80 (0.74–0.85) | 0.15 (0.11–0.25) | 0.99 (0.99–1.0) | 0.80 (0.75–0.85) |