Score Cut-off
High risk individuals (n, %)
True large niche (n)
Sensitivity (%)
Specificity (%)
Youden’s index
1 470 (64.65) 163 100.00 45.57 0.46
2 340 (46.77) 147 90.18 65.78 0.56
3 269 (37.00) 129 79.14 75.17 0.54
4 231 (31.77) 117 71.78 79.79 0.52
5 166 (22.83) 110 67.48 90.07 0.58
6 91 (12.52) 67 41.10 95.74 0.37
7 48 (6.60) 37 22.70 98.05 0.21
8 18 (2.84) 16 9.82 99.65 0.09
9 9(1.24) 9 5.52 100.00 0.06
10 3(0.41) 3 1.84 100.00 0.02