Smartphone app with mood tracking and CBT exercises reduced workplace stress by 39% in 4 weeks
A randomized controlled trial of 178 working adults found that a smartphone app (Neurum) delivering cognitive behavioral therapy, mindfulness, and self-regulation exercises over 4 weeks significantly reduced depression, anxiety, and stress symptoms compared to control, with the largest benefit in stress reduction.
Work-related stress is a major risk factor for mental disorders and poor well-being. This randomized controlled trial tested a smartphone app called Neurum in 201 working adults (mean age 34.6 years); 178 completed the study.
Participants in the intervention group (n=81) were encouraged to log mood journals, complete mental health exercises, and provide feedback over 4 weeks, while the control group (n=97) received no intervention. The app delivered cognitive behavioral therapy, mindfulness exercises, and self-regulation practices in real-time. Outcomes were measured using the Depression, Anxiety, and Stress Scale (DASS-21). After 4 weeks, the intervention group's DASS-21 scores fell by 14.5 points (mean difference -14.518), while the control group's scores rose by 3.3 points (mean difference +3.319; F=59.358, P<0.001, effect size η²=0.252). Stress reduction showed the strongest effect: intervention group declined 6.7 points versus control group increased 2.0 points (F=64.679, P<0.001). On average, participants completed 6.3 exercises and 9.7 mood logs, engaging 4.95 minutes daily. A significant limitation was higher dropout from the intervention group (20.6%) than control (2%), suggesting engagement challenges. The study establishes the app's effectiveness for workplace mental health in a non-clinical, working population.
The stress reduction effect size (η²=0.252) is moderate and clinically meaningful—the 6.7-point decline in the stress subscale approached a small-to-medium effect. Interestingly, the number of exercises completed or mood logs recorded did not correlate significantly with symptom improvement, suggesting that quality or timing of use may matter more than volume. This non-linear dose-response pattern is common in digital mental health interventions and implies that even occasional engagement can yield benefit. The high dropout rate (20.6% intervention vs. 2% control) raises questions about app design and motivation in real-world settings; participants who stayed engaged may have had higher baseline mental health literacy or intrinsic motivation. Subgroup analysis by adherence level was not reported, limiting our understanding of who benefits most. The study lacked a long-term follow-up phase, so it is unclear whether gains persist beyond 4 weeks or require ongoing use.
The deeper explanation, the effect sizes and caveats, and what this means for your own sleep, exercise and reading — read it inside Cadence.
Open in Cadence →References
- A Smartphone-Based Ecological Momentary Intervention for Workplace Mental Health: Randomized Controlled Trial. — JMIR mHealth and uHealth (Read the original)
- Dewa CS, Lesage A, Goering P, Craveen M. Nature and prevalence of mental illness in the workplace. Healthc Pap. 2004;5(2):12–25. doi: 10.12927/hcpap..16820. doi. Medline.
- The Lancet Global Health Mental health matters. Lancet Glob Health. 2020 Nov;8(11):e1352. doi: 10.1016/S2214-109X(20)30432-0. doi. Medline.
- Strawn JR, Geracioti L, Rajdev N, Clemenza K, Levine A. Pharmacotherapy for generalized anxiety disorder in adult and pediatric patients: an evidence-based treatment review. Expert Opin Pharmacother.
- Zhang A, Franklin C, Jing S, et al. The effectiveness of four empirically supported psychotherapies for primary care depression and anxiety: a systematic review and meta-analysis. J Affect Disord. 201
- Guidi J, Fava GA. Sequential combination of pharmacotherapy and psychotherapy in major depressive disorder: a systematic review and meta-analysis. JAMA Psychiatry. 2021 Mar 1;78(3):261–269. doi: 10.10