| Threshold | Specificity | Sensitivity | PPV | NPV | AUC | P value |
---|---|---|---|---|---|---|---|
Flow index | 4.5 (3.0–5.1) | 0.84 (0.70–0.89) | 0.81 (0.72–0.90) | 0.34 (0.23–0.43) | 0.98 (0.97–0.99) | 0.89 (0.85–0.93) | – |
RR (breaths min−1) | 26 (25–26) | 0.47 (0.58–0.51) | 0.69 (0.58–0.79) | 0.12 (0.10–0.14) | 0.93 (0.91–0.96) | 0.55 (0.49–0.61) | < 0.001 |
RR/VT (breaths L−1 min−1) | 40 (40–40) | 0.64 (0.60–0.68) | 0.67 (0.57–0.78) | 0.17 (0.14–0.20) | 0.95 (0.93–0.97) | 0.55 (0.49–0.61) |  < 0.001 |
VT/IBW (mL kg−1) | 8.8 (8.8–8.8) | 0.64 (0.59–0.69) | 0.69 (0.58–0.81) | 0.17 (0.14–0.19) | 0.95 (0.94–0.97) | 0.66 (0.60–0.72) | < 0.001 |
P0.1 (cmH2O) | 1.4 (1.1–1.4) | 0.75 (0.63–0.80) | 0.75 (0.66–0.85) | 0.24 (0.19–0.28) | 0.97 (0.95–0.98) | 0.77 (0.71–0.82) | < 0.001 |