Table 2.

Sensitivity and specificity of different cut-off values

Cut-off	Sensitivity (%)	Specificty (%)
<0.85	39.3 (31.1 to 47.8)	96.8 (94.9 to 98.2)
<0.90	49.0 (40.6 to 57.4)	94.8 (92.5 to 96.6)
<0.95	53.1 (44.7 to 61.4)	93.2 (90.7 to 95.3)
<1.00	64.1 (55.8 to 71.9)	91.0 (88.2 to 93.4)
<1.05	74.5 (66.6 to 81.4)	84.4 (81.0 to 87.5)
<1.10	78.6 (71.2 to 85.0)	75.9 (71.9 to 79.5)
<1.15	86.9 (80.3 to 91.9)	62.9 (58.5 to 67.1)

95% confidence interval.