Table 3.

Pearson correlations of discounting rates obtained from the three discounting tasks with measures of e-cigarette use, attempts to quit, and nicotine dependence.

	M-M logk	M-M AUClog	mL-mL logk	mL-mL AUClog	mL-M logk	mL-M AUClog
PSECDI	.127	−.111	.126	−.106	−.080	.052
QVU-B	.158	−.154	0.28	−.068	.292	−.387
Attempts to quit vaping	.392*	−389*	.460*	−.474*	.248	−.280
Months of regular e-cigarette use	−.074	.075	−.174	.234	.124	.024
Nicotine e-liquid (mg/mL)	.244	−.209	.099	−.129	.043	−.191
Daily use of e-liquid (mL)	−.394*	.367	−.306	.352	−.158	.265

Note: PSECDI = Penn State Electronic Cigarette Dependence Index; QVU-B = Brief Questionnaire for Vaping Urges; mg = milligrams; mL = milliliters; M-M = money vs. money; mL-mL = milliliters vs. milliliters; mL-M = milliliters vs. money

^***indicates p < .001

^**indicates p < .01;

^*indicates p < .05.