Table 5.

Impact of the Selected Threshold on the Accuracy of Measure

Measure	Performance Measure	Probit Model	Logit Model	Log-log Model	Complementary Loglog Model
Cotinine threshold of 3 ng/mL	Sensitivity	0.9307***	0.9335***	0.9042***	0.9678*
		(0.0186)	(0.0190)	(0.0220)	(0.0167)
	Specificity	0.9805***	0.9883	0.9969	0.9689***
		(0.0071)	(0.0072)	(0.0072)	(0.0070)
Cotinine threshold of 8 ng/mL	Sensitivity	0.9200***	0.9221***	0.8951***	0.9584*
		(0.0237)	(0.0248)	(0.0292)	(0.0225)
	Specificity	0.9826**	0.9903	0.9986	0.9711***
		(0.0082)	(0.0082)	(0.0077)	(0.0088)
Cotinine threshold of 15 ng/mL	Sensitivity	0.8967***	0.8983***	0.8728***	0.9348***
		(0.0216)	(0.0221)	(0.0239)	(0.0218)
	Specificity	0.9844**	0.9916	0.9995	0.9734***
		(0.0065)	(0.0064)	(0.0059)	(0.0074)
Self-reported data	Sensitivity	0.9147***	0.9168***	0.8909***	0.9525**
		(0.0226)	(0.0237)	(0.0278)	(0.0219)
	Specificity	0.9813**	0.9890	0.9973	0.9704***
		(0.0086)	(0.0086)	(0.0083)	(0.0091)

Note:

^***p < 0.01;

^**p < 0.05;

^*p < 0.10.