Table 2.

Engagement with the digital therapeutic intervention in the treatment group (intention-to-treat participants, n=265).

Engagement	Value
App opens up to week 4, mean (SD), IQR	37 (52), 9-43
Days between randomization and quit date, mean (SD), IQR	16 (21), 9-23
Still active by quit date, n (%)	236 (89.1)
Still active 4 weeks after quit date, n (%)	196 (74.0)
Completed Essentials 1a, n (%)	146 (55.1)
Completed Essentials 2b, n (%)	95 (35.8)
Sent 1+ messages to coach, n (%)	183 (69.1)
Messages to coach before quit date, mean (SD), IQR	3.3 (5.9), 0-4
Messages to coach from quit date to week 4, mean (SD), IQR	4.2 (7.5), 0-6
Messages from coach before quit date, mean (SD), IQR	6.6 (6.3), 2-9
Messages from coach from quit date to week 4, mean (SD), IQR	6.2 (5.8), 2-9
Number of diary entriesc before quit date, mean (SD), IQR	12 (27), 1-12
Number of check-insd from quit date to week 4, mean (SD), IQR	6 (10), 0-9

^aEssentials 1: program content aimed at preparation for the quit date.

^bEssentials 2: program content intended for just after the quit date.

^cDiary entry: registration of a cigarette smoked before and after the quit date.

^dCheck-in: self-report of smoking status after the quit date.