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Linear regression of baseline predictors of app engagement.
| Variable | Estimate (SE) | 95% CI |
| Age | 13.6 (53.2) | −90.7 to 117.8 |
| Gender (referent=male) | −314.2 (216.6) | −738.7 to 110.4 |
| Past-month alcohol use | −10.5 (4.4) | −19.2 to -1.8 |
| Past-month cannabis use | −20.6 (23.6) | −66.9 to 25.7 |
