The effect of short-term exposure to the natural environment on depressive mood: A systematic review and meta-analysis

Environmental Research
Hannah RobertsMarco Helbich

Abstract

Research suggests that exposure to the natural environment can improve mood, however, current reviews are limited in scope and there is little understanding of moderators. To conduct a comprehensive systematic review and meta-analysis of the evidence for the effect of short-term exposure to the natural environment on depressive mood. Five databases were systematically searched for relevant studies published up to March 2018. Risk of bias was evaluated using the Cochrane Risk of Bias (ROB) tool 1.0 and the Risk of Bias in Non-Randomised Studies of Interventions (ROBINS-I) tool where appropriate. The Grades of Recommendation, Assessment, Development, and Evaluation (GRADE) approach was used to assess the quality of evidence overall. A random-effects meta-analysis was performed. 20 potential moderators of the effect size were coded and the machine learning-based MetaForest algorithm was used to identify relevant moderators. These were then entered into a meta-regression. 33 studies met the inclusion criteria. Effect sizes ranged from -2.30 to 0.84, with an unweighted mean effect size of Mg=-0.29,SD=0.60. However, there was significant residual heterogeneity between studies and risk of bias was high. Type of natural environment, ty...Continue Reading

Citations

Nov 26, 2020·International Journal of Environmental Research and Public Health·Elise PetersCarlo Schuengel
Jan 2, 2021·Scientific Reports·Melissa R MarselleAletta Bonn
Jan 1, 2021·Geography Compass·Simon ScheiderHaiqi Xu
Jan 14, 2021·International Journal of Environmental Research and Public Health·Hector A Olvera-AlvarezGregory N Bratman

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