The effectiveness of an online multimodal intervention for mental health promotion: A randomised controlled trial

Abstract

Introduction: There is an urgent need for efficacious interventions to combat the global mental health crisis, and mental health promotion and primary preventive approaches are paramount. Objective: This study examined whether an online multimodal intervention that incorporates evidence-based strategies from the disciplines of Lifestyle Medicine and Positive Psychology improved measures of mental health and emotional wellness. Methods: 425 adults (68.8% females, aged 46.5 ± 15.6) from Australia and New Zealand were randomised to an intervention or control group. The intervention group participated in a ten-week online multimodal intervention. Measures of mental health and emotional wellness were taken at baseline (Week 1), post-intervention (Week 12), and 12 weeks post-intervention (Week 24). The control group completed the same assessments. Results: The intervention group experienced significant improvements from Week 1 to 12 in: mental health (10%, p < 0.001, d = 0.50) and vitality (22%, p < 0.001, d = 0.54) subscales of the Short Form Survey (SF-36); depression (-42%, p < 0.001, d = 0.48), anxiety (-38%, p < 0.001, d = 0.39) and stress (-31%, p < 0.001, d = 0.52) subscales of the Depression, Anxiety and Stress Scale (DASS-21); and life satisfaction (8%, p < 0.001, d = 0.48) as measured by the Satisfaction With Life Scale (SWLS).The control group experienced significant improvements only in the mental health (3%, p = 0.028, d = 0.16) subscale of the SF-36, and the stress subscale (-9%, p = 0.038, d = 0.15) of the DASS-21. The changes in the intervention group were significantly greater (p < 0.001) than the control group for all measures. Improvements in the outcome measures were generally sustained for the intervention group at 12 weeks post-intervention. Conclusion: The online multimodal intervention improved measures of mental health and emotional wellness suggesting that such interventions may be useful for mental health promotion and prevention. Trial registration: The Australian New Zealand Clinical Trials Registry ACTRN12619000993190. Registered on 12 July 2019 (Retrospectively registered). The ANZCTRN is part of the WHO Primary Registries.