Cut-off points
Sensitivity %
Specifity %
PPV % NPV %
Correctly classified %
κϮ
p
<17 84.4 47.1 28.6 92.3 80.0 0.245 0.002
<18 77.3 58.8 25.6 93.4 75.2 0.232 0.002
<19 73.4 64.7 24.4 94.0 72.4 0.223 0.001
<20 69.5 64.7 22 93.7 69.0 0.186 0.005
<21 60.9 88.2 23.1 97.5 64.1 0.221 <0.001
<22 52.3 94.2 20.8 98.5 57.2 0.184 <0.001
<23 44.5 94.1 18.4 98.3 50.3 0.139 0.002
<24 35.2 100 17.0 100 42.8 0.113 0.003