This repository contains the *R* code and results of a secondary analysis of three randomized controlled trials evaluating an Internet- and Mobile-based Intervention for Depression (*HelloBetter Depression*). The three trials considered in this analysis are: - Buntrock, C., Ebert, D. D., Lehr, D., Smit, F., Riper, H., Berking, M., & Cuijpers, P. (2016). Effect of a web-based guided self-help intervention for prevention of major depression in adults with subthreshold depression: a randomized clinical trial. *JAMA, 315*(17), 1854-1863. - Ebert, D. D., Buntrock, C., Lehr, D., Smit, F., Riper, H., Baumeister, H., ... & Berking, M. (2018). Effectiveness of web-and mobile-based treatment of subthreshold depression with adherence-focused guidance: a single-blind randomized controlled trial. *Behavior Therapy, 49*(1), 71-83. - Reins, J. A., Boß, L., Lehr, D., Berking, M., & Ebert, D. D. (2019). The more I got, the less I need? Efficacy of Internet-based guided self-help compared to online psychoeducation for major depressive disorder. *Journal of Affective Disorders, 246*, 695-705.