Cut-off point

Sensitivity (%)

Specificity (%)

(≥8)

100

0

(≥7)

97.92

13.97

(≥6)

89.58

36.03

(≥5)

76.39

55.87

(≥4)

65.97

70.67

(≥3)

47.92

85.75

(≥2)

27.78

93.02

(≥1)

15.28

97.21

(≥0)

6.94

99.16

(>0)

0

100