Table 3.

| Correlations among engagement and outcome variables

	1	2	3	4	5
1. Treatment group
2. Change in cigarette use	.39*
3. Number of app interactions	.30*	.50*
4. Minutes/day of app use	.28*	.42*	.87**
5. Days of app use	.05	.44*	.89**	.70**
6. Average duration of app interactions (minutes)	−.44*	.00	.03	−.25*	.16

**p < .01, *p < .05.