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