Effectiveness of stress control large group psychoeducation for anxiety and depression: Systematic review and meta-analysis.

Objectives: This review sought to evaluate the effectiveness of the 'Stress Control' (SC) large psychoeducational 6-session group programme developed to increase access to treatment for patients with anxiety and depression.

Design: Systematic review and meta-analysis (Prospero registration: CRD42020173676).

Methods: Pre-post and post-treatment follow-up effect sizes were extracted and synthesized in a random effects meta-analysis, and variations in effect sizes were investigated via moderator analyses. Secondary analyses synthesized between-group effect sizes from controlled studies containing comparator treatments and calculated the average dropout rate. The quality of the meta-analysis was assessed using the GRADE approach.

Results: Nineteen studies with pre-post treatment outcomes were included. The average group size was N = 39, and the average dropout rate was 34%. Pooled effect sizes indicated moderate pre-post treatment reductions in anxiety (ES = 0.58; CI 0.41 to 0.75; N = 5597; Z = 7.13; p < .001), moderate reductions in depression (ES = 0.62; CI 0.44 to 0.80; N = 5538, Z = 7.30; p < .001), and large reductions in global distress (ES = 0.86; CI 0.61 to 1.11; N = 591; Z = 7.41; p < .001). At follow-up, improvements in anxiety, depression, and global distress were maintained. When SC was compared to active and passive controls, outcomes were equivalent for anxiety (ES = 0.12, 95% CI -0.25 to 0.49, Z = -0.70; p = .482) and depression (ES = 0.15, 95% CI -0.24 to 0.54, Z = 0.84; p = .401).

Conclusions: SC appears to be a clinically effective and durable low-intensity group intervention that facilitates access to treatment for large patient numbers. However, conclusions are limited by the low methodological quality of the evidence.

Practitioner Points: The stress control version of large group psychoeducation is appropriate and effective for mild-to-moderate anxiety and depression The evidence base for stress control is predominantly made up of practice-based studies Stress control needs to form one component of the overall offer made to patients presenting with mild-to-moderate anxiety and depression The competencies required to deliver such groups need better specification.