Cutoff point (mm)

3 mm

3.2 mm

3.4 mm

FP

10

8

6

TN

40

42

44

TP

47

44

41

FN

3

6

9

Sensitivity

94%

88%

82%

Specificity

80%

84%

88%

PPV

82%

84%

87%

NPV

93%

87%

83%