Digital Psychotherapies for Adults Experiencing Depressive Symptoms: Systematic Review and Meta-Analysis

Area of Science:

• Mental Health
• Digital Therapeutics
• Psychiatry

Background:

• Depression impacts 5% of adults globally, representing a significant cause of disability.
• Digital psychotherapies present an accessible avenue for addressing depression.
• This review synthesizes evidence on digital interventions for depression's effectiveness and user experience.

Purpose of the Study:

• Identify common digital psychotherapy modalities for depression.
• Explore client and practitioner perspectives on helpful/unhelpful aspects of digital interventions.
• Evaluate the overall effectiveness of digital psychotherapies for adult depression.

Main Methods:

• Systematic review following PRISMA guidelines, employing a PICOS framework (2010-2024).
• Searched 7 databases, with data extracted and reviewed by multiple authors to ensure rigor.
• Utilized qualitative narrative synthesis for user perceptions and meta-analysis (Hedges g) for depression outcomes.

Main Results:

• 160 studies (70,720 participants) were included; 81.8% were quantitative, 55% randomized controlled trials.
• Blended digital interventions showed a large effect size (Hedges g=-0.793), superior to human-contact (g=-0.42) or no-contact (g=-0.40) interventions.
• Positive user perceptions included motivation and accessibility; negative perceptions cited usability and lack of direction.

Conclusions:

• Digital interventions for depression are effective across various formats and frequencies.
• Blended approaches demonstrate superior efficacy compared to other digital formats.
• Future research should explore heterogeneity factors influencing intervention and population characteristics.