AUC (95% CI) | Optimal cut-off value | Sensitivity % (95% CI) | Specificity % (95% CI) | +LR | -LR | PPV (%) | NPV(%) | |
---|---|---|---|---|---|---|---|---|
Bishop score | 0.57 (0.50- 0.64) | ≤ 3 | 30.30 (15.6 - 48.7) | 86.0 (79.8 - 90.8) | 2.16 | 0.81 | 29.4 | 86.5 |
Frequency of CR | ||||||||
9.8 kHz | 0.62 (0.55-0.69)* | <1.92 Ω.m. | 93.55 (78.5 - 99.0) | 30.36 (23.5 - 37.9) | 1.34 | 0.21 | 19.9 | 96.2 |
19.5 kHz | 0.63 (0.56-0.70)* | <2.03 Ω.m. | 87.10 (70.1 - 96.3) | 35.12 (27.9 - 42.8) | 1.34 | 0.37 | 19.9 | 93.7 |
39.1 kHz | 0.66 (0.58-0.72)** | <2.24 Ω.m. | 70.97 (52.0 - 85.7) | 53.57 (45.7 - 61.3) | 1.53 | 0.54 | 22.0 | 90.9 |
78.1 kHz | 0.66 (0.59-0.72)** | <2.25 Ω.m. | 70.97 (52.0 - 85.7) | 56.55 (48.7 - 64.2) | 1.63 | 0.51 | 23.2 | 91.3 |