Table 1.

Correlations Between Electrophysiology and Subjective Measures

	mQSU-brief factors		mCES factors
	Relief from withdrawal	Intention to use smokeless tobacco	Psychological reward	Satisfaction	Aversion
N2	−0.09	−0.22*	0.12	0.07	−0.04
P3b	0.01	0.02	−0.01	0.13	0.04
Alpha	−0.25**	−0.10	0.33***	0.25**	0.14

mQSU = modified version of the Questionnaire on Smoking urges; mCES = modified version of the Cigarette Evaluation Scale. mQSU-brief factors reflect the difference score of post minus pre product usage. To improve the interpretability the correlations, the sign of the N2 and alpha suppression difference scores were reversed.

*P < .05, **P < .01, ***P < .001.