Ecological momentary interventions for depression: A systematic review and meta-analysis

Clinical Snapshot

Key Findings

• P Value: Depressive symptoms: p < 0.001; Quality of life: p < 0.01

• Effect Size: Hedges' g = 0.57 (moderate effect) at post-test; Hedges' g = 0.43 at follow-up (10–32 weeks); Quality of life: Hedges' g = 0.44

• Primary Outcome: Reduction in depressive symptom severity at post-test across 16 RCTs (n=1258)

• Nnt Or Sensitivity: NNT not calculable from abstract data. Engagement rate: mean 64.91% (SD 17.18; range 37.5%–88.0%). Intervention dosage and risk of bias identified as significant moderators of efficacy.

• Confidence Interval: Depressive symptoms post-test: 95% CI 0.33–0.80; Quality of life: 95% CI 0.17–0.71; Follow-up CI not reported in abstract

Clinical Application

EMIs are delivered via smartphones or wearable devices in real-world settings, making them scalable and accessible. High acceptability and usability ratings support patient-facing implementation. However, variable engagement (37.5%–88.0%) and inconsistent reporting standards highlight real-world adherence as a significant implementation challenge. Clinician training requirements are likely minimal for automated formats. Australia has a well-developed digital mental health infrastructure, including government-funded platforms such as MindSpot, THIS WAY UP, and the Head to Health portal, which contextualises EMI integration within existing care pathways. The TGA regulates software as a medical device (SaMD) under the Software as a Medical Device framework, meaning EMI applications with therapeutic claims may require regulatory oversight. The RACGP supports digital mental health tools as adjuncts to GP-led care, consistent with the review's findings. PBS-listed pharmacotherapy and MBS-funded psychological therapies remain first-line; EMIs are best positioned as adjunctive or stepped-care tools. Australia's geographic diversity and high smartphone penetration make EMIs particularly relevant for rural and remote populations with limited access to face-to-face psychological services. Cultural and linguistic adaptation would be required for Aboriginal and Torres Strait Islander communities and CALD populations. Adults with depression or clinically significant depressive symptoms, particularly those with residual symptoms despite standard treatment, or those seeking adjunctive digital support. Subgroup analyses suggest greatest benefit from EMIs incorporating psychoeducation, active practice components, and fully automated delivery formats.

Abstract

INTRODUCTION: Depression remains a prevalent condition with many individuals experiencing residual symptoms despite standard treatments. Ecological momentary interventions (EMIs) offer real-time, ecologically-valid microinterventions, yet their clinical utility and implementation challenges in depression remain underexplored. METHOD: A systematic search of six databases (inception to 25 July 2025) identified randomised controlled trials (RCTs) evaluating EMIs for depression. Pooled effect sizes assessed differences relative to comparator conditions. RESULTS: Sixteen RCTs involving 1258 participants were included. EMIs significantly reduced depressive symptoms at posttest (Hedges' g = 0.57; 95% CI = 0.33-0.80; p < 0.001) and at follow-up ranging from 10 to 32 weeks (Hedges' g = 0.43). High heterogeneity reflected variability in EMI formats. EMIs also showed a statistically significant improvement in quality of life (Hedges' g = 0.44; 95% CI = 0.17-0.71; p < 0.01), supporting their broader impact beyond symptom reduction. Engagement averaged 64.91% (SD = 17.18), ranging 37.5%- 88.0%, with variation across reporting methods. Acceptability and usability ratings were consistently high. Intervention dosage and risk of bias were significant moderators of treatment efficacy. Subgroup analyses revealed greater benefits from EMIs incorporating psychoeducation and active practice, and fully-automated formats. CONCLUSION: The review highlights EMI efficacy in reducing depressive symptoms and improving quality of life, with intervention dosage and methodological rigor emerging as key moderating factors. Reporting engagement remains a challenge, and substantial heterogeneity underscores the need for refined trial designs to isolate the active EMI components to best optimise treatment outcomes in depression. Future studies should prioritise strategies strengthen methodological rigor and optimising user engagement. PROSPERO No. CRD420251105663.

References

1. 1.Yuen, S. Y., Lo, H. K. Y., Jin, J. X. H., Ho, F. Y.-Y., Poon, C.-Y., Yeung, W.-F., Yu, B. Y.-M., Lee, C. T., Myin-Germeys, I., & Chung, K. F. (2026). Ecological momentary interventions for depression: A systematic review and meta-analysis. Journal of Affective Disorders. Advance online publication. https://doi.org/10.1016/j.jad.2026.121547