Characters | Diagnostic characteristics of basal measures cutoff points in predicting latency period within two days | |||||
Cervical length ≤ 25.0 mm | Posterior uterocervical angle ≥ 108.0˚ | Anterior uterocervical angle ≥106.0˚ | ||||
Value | 95% CI | Value | 95% CI | Value | 95% CI | |
Sensitivity | 78.9% | 66.1% - 88.6% | 93.0% | 83.0% - 98.1% | 93.0% | 83.0% - 98.1% |
Specificity | 65.5% | 57.3% - 73.2% | 60.1% | 51.8% - 68.1% | 71.6% | 63.6% - 78.7% |
DA | 69.3% | 62.5% - 75.5% | 69.3% | 62.5% - 75.5% | 77.6% | 71.2% - 83.1% |
YI | 44.5% | 31.4% - 57.6% | 53.1% | 42.8% - 63.4% | 64.6% | 54.8% - 74.4% |
PPV | 46.9% | 36.6% - 57.3% | 47.3% | 37.8% - 57.0% | 55.8% | 45.2% - 66.0% |
NPV | 89.0% | 81.6% - 94.2% | 95.7% | 89.4% - 98.8% | 96.4% | 91.0% - 99.0% |
LR+ | 2.29 | 1.77 - 2.97 | 2.33 | 1.89 - 2.88 | 3.28 | 2.51 - 4.27 |
LR− | 0.32 | 0.19 - 0.54 | 0.12 | 0.04 - 0.30 | 0.10 | 0.04 - 0.25 |
LR | 7.13 | 3.47 - 14.67 | 19.99 | 6.87 - 58.17 | 33.44 | 11.39 - 98.20 |
Kappa | 0.368 | 0.249 - 0.486 | 0.410 | 0.305 - 0.514 | 0.536 | 0.427 - 0.645 |