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Table 5 Diagnostic values of discordances of fetal growth parameters in the early third-trimester for growth discordancea

From: Predictive value of prenatal ultrasound parameters for dichorionic growth discordant twins

Parameter

Early third-trimester

AUC

P

95% CI

Youden index

Cut-off (%)

Sensitivity (%)

Specificity (%)

PPV (%)

NPV (%)

+LR

BPD

0.688

0.004

0.62–0.75

0.34

4.60

71.43

62.50

65.57

68.63

1.90

HC

0.672

0.086

0.56–0.77

0.39

7.07

42.86

95.83

91.13

62.65

10.28

AC

0.740

< 0.001

0.67–0.80

0.40

8.02

57.14

83.43

77.52

66.06

3.45

FL

0.780

< 0.001

0.72–0.83

0.46

5.26

66.67

79.89

76.83

70.56

3.31

EFW

0.822

< 0.001

0.76–0.87

0.58

20.36

66.67

91.30

88.46

73.26

7.66

  1. aBPD biparietal diameter; HC head circumference; AC abdominal circumference; FL femur length; EFW estimated fetal weight; AUC area under the curve; CI confidence interval; PPV positive predictive value; NPV negative predictive value; +LR positive likelihood ratio