Table 3.

Sensitivity, specificity and Youden Index for a range of genotypic susceptibility score (GSS)

GSS	Sensitivity	Specificity	Sensitivity-(1-Specificity)	Youden Index
1	1.00	0.00	0.00
1.25	0.97	0.08	0.05	0.05
1.5	0.82	0.15	−0.02
1.75	0.74	0.23	−0.03
2	0.73	0.31	0.04
2.25	0.47	0.46	−0.07
2.5	0.41	0.46	−0.13
2.75	0.38	0.54	−0.08
3	0.27	0.54	−0.19
4	0.01	1.00	0.01

Note: Bold values represent the GSS, sensitivity, and specificity associated with the Youden Index.