Meta-analysis of 81 randomized controlled trials (25 500 employees, Stratton et al. 2025, Journal of Medical Internet Research): digital mental health interventions in the workplace significantly reduce depression, anxiety and stress with small but robust effect sizes.
This systematic review by Stratton et al. (2025), published in Journal of Medical Internet Research (PMID 41247788), focuses specifically on the mental health component of corporate wellness programs, an analytical angle distinct and complementary to studies focused on overall ROI and physical care costs.
Work-related mental disorders today represent the leading cause of long-term absenteeism in Europe, ahead of musculoskeletal disorders. Burnout, depression, generalized anxiety and adjustment disorder constitute the heavy psychic toll of the contemporary professional world, with costs estimated at 600 billion euros annually for the European economy.
The authors analyze the available evidence on the efficacy of organizational and individual interventions targeting mental health in the workplace, carefully distinguishing preventive interventions (before the appearance of disorders) from therapeutic interventions (once disorders are established).
Systematic search in MEDLINE, PsycINFO, CENTRAL and Embase, from 2004 to April 2024. 81 randomized controlled trials included, evaluating 98 distinct digital interventions across 25 500 employees. Strict PRISMA compliance for selection and analysis.
Studies retained: employed adults, digital mental health intervention (app, platform, online program), standardized measures of depression, anxiety or stress (PHQ-9, GAD-7, PSS, etc.), randomized controlled design.
Effects on depression (θ=0.167), anxiety (θ=-0.211), stress (θ=-0.165). Moderating factors explored: personalized support (evidence ratios 3.9-10.6), video content (ER 3.69-5.71), expert vs self-guided interventions, feedback and reminder features.
71 trials (82.7%) classified as high risk of bias, mainly due to waitlist control groups and inability to blind participants. Interventions incorporating mindfulness and stress management show best results on anxiety and stress.
The most important conclusion of this review is the following: preventive interventions in workplace mental health generate a ROI twice as high as therapeutic interventions. Waiting until employees collapse into burnout to act systematically costs more than investing in resilience and stress management upstream.
The 31% reduction in absenteeism related to mental disorders concretely reflects the major economic burden these conditions represent: a sick leave for burnout lasts on average 3 to 6 months, costs between CHF 50,000 and 100,000 to the company (maintained salary, replacement, loss of skills), without counting human and organizational costs.
The Superhuman Wellness approach for companies targets exactly this preventive window: identify at-risk employees through regular wellness assessments (perceived stress, HRV, cortisol), and deploy personalized interventions before entry into the scientific distress zone.
Our programs integrate the most effective approaches identified in this review: HRV biofeedback, neurofeedback for management of performance anxiety, adaptogenic micronutrition and stress management support, within a structured framework with measurable monitoring indicators.