Table 2.

Performance of GES and cotinine models

	AUC*	Sensitivity	Specificity
GES – Development Set	0.93	0.79	0.95
GES – Validation Set	0.82 (0.65-0.94)	0.63	0.94
Cotinine – Validation Set	0.89 (0.81-0.97)	0.81	0.97

^*95% confidence interval is shown in parentheses. As the AUC for the development set was derived via cross-validation, a confidence interval could not be assigned. However, the standard deviation of the cross-validation runs equaled 0.03; the standard error equaled 0.001.