Table 2.

Associations between the predictors and the number of different days when the app was accessed

Predictors’ category	Predictors	b	OR	SE	p value*	95% CI
Demographics	Country (Switzerland vs. France)	−0.266	0.767	0.143	0.064	0.579	1.015
	Age	−0.012	0.988	0.009	0.150	0.971	1.004
	Sex	−0.217	0.805	0.132	0.100	0.622	1.043
Treatment/control	Experiment group	−0.564	0.569	0.124	<0.001	0.446	0.726
Baseline	Number of years smoking	−0.008	0.992	0.008	0.352	0.976	1.009
	Cigarettes/day	−0.016	0.984	0.010	0.105	0.964	1.003
	Number of minutes before the first cigarette of the day	−0.142	0.868	0.064	0.026	0.766	0.983
	Use/smoke other tobacco products	−0.006	0.994	0.054	0.918	0.895	1.105
	Use of heated tobacco products	0.114	1.120	0.135	0.401	0.859	1.461
	Use of e-cigarettes	−0.040	0.961	0.065	0.540	0.846	1.091
	Use of nicotine medications	−0.101	0.904	0.184	0.584	0.631	1.297
	Depression	0.134	1.144	0.123	0.276	0.898	1.456
Follow-up after 1 month	Cigarettes/day	0.020	1.021	0.013	0.126	0.994	1.048
	Use of heated tobacco product	−0.517	0.596	0.275	0.060	0.348	1.022
	Use of e-cigarettes	−0.156	0.856	0.091	0.087	0.716	1.023
	Use of nicotine medications	0.048	1.049	0.161	0.767	0.764	1.440
	Current use of any smoking cessation app	0.785	2.193	0.132	<0.001	1.691	2.843
	Intention to quit smoking	1.236	3.443	0.150	<0.001	2.565	4.623
	Perceived helpfulness of the app	0.321	1.378	0.063	<0.001	1.218	1.559
	Having quit smoking	−0.472	0.624	0.143	<0.001	0.471	0.826

b, beta coefficient; OR, odds ratio; SE, standard error; CI, confidence interval.

*Significant at least at p < 0.05.