Table 4.
Engagement and app interactions over the study period per participant stratified by arm.
| Interactions | Control, median (IQR) | Intervention, median (IQR) | |
| Engagement measures | |||
|
|
Initializations | 3 (2-9) | 13.5 (4-27) |
|
|
Session count | 24 (16-45) | 54 (27-150) |
|
|
Session duration | 60.9 (35.7-75.6) | 43.8 (32.3-67.9) |
|
|
Server interactions | 7 (5-8) | 13 (8-19) |
| App-recorded interactions | |||
|
|
Drinking days | N/Aa | 7 (4-11) |
|
|
Drink-free days | N/A | 3.5 (2-7) |
|
|
Units consumed per drinking day | N/A | 12.8 (4.4-16.5) |
| Notifications | |||
|
|
Push notifications | 1 (1-1) | 18 (9-19) |
|
|
SMSb text messages | 2 (0-2) | 12 (10-14) |
| Weeks active | 1 (1-2) | 3.5 (2-6) | |
aN/A: not applicable; participants in the control arm were not able to provide this information.
bSMS: short message service.