(n)

Level (mm)

Sn (%)

Sp (%)

PPV (%)

NPV (%)

LR+

LR−

Compan et al. [11]

(451)

<25

88.00

59.00

2.09

0.20

<30

88.00

40.00

1.47

0.30

Sotiriadis et al. [9]

(122)

<15

83.30

95.80

55.60

98.90

19.8

0.17

<25

83.30

77.10

18.50

98.70

3.64

0.22

Gonzalez et al. [12]

(192)

<30

97.20

31.40

24.60

98.00

1.42

0.09

Deplagne et al. [13]

(111)

≤20

75.00

52.00

21.00

92.00

1.56

0.48

Benichou et al. [14]

(537)

<25

59.00

85.00

45.00

91.00

3.93

0.48

<30

81.00

65.00

46.00

90.00

2.31

0.29

Sotiriadis et al. [15]

(2114)

≤15

59.90

90.50

6.31

0.44

<25

78.30

70.80

2.68

0.31

Berthelot-Ricou [16]

(181)

≤15

61.80

83.50

75.30

72.80

1.74

0.46

≤20

83.10

52.30

58.70

72.20

1.47

0.32

Demirci et al. [17]

(209)

≤15

78.90

94.20

13.64

0.22

Palacio et al. [18]

(333)

≤15

28.60

96.50

8.1

0.74

<25

71.40

79.20

3.43

0.36

Bagga et al. [19]

(100)

<25

60.00

96.90

19.5

0.41