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Green space and schizophrenia: A review

Published online by Cambridge University Press:  13 August 2021

R. Mota Freitas  and
M.T. Valadas
R. Mota Freitas*
Affiliation:
Departamento De Psiquiatria E Saúde Mental, Hospital do Espírito Santo de Évora, Évora, Portugal
M.T. Valadas
Affiliation:
Serviço De Psiquiatria, Unidade Local de Saúde do Baixo Alentejo, Beja, Portugal
*
*Corresponding author.

Abstract

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Introduction

Urban living has consistently been associated with higher risk of developing schizophrenia when compared to rural living. Exposure to green space has been associated with better mental health outcomes and, more recently, childhood exposure to green space has been linked with lower rates of schizophrenia. The reasons for these findings remain unknown, although lower levels of pollution and psychological factors may play a role.

Objectives

We aim to review the literature regarding exposure to green space and its relationship with the risk of developing schizophrenia.

Methods

We performed an updated review in the PubMed database using the terms “green space” and “schizophrenia”. The included articles were selected by title and abstract.

Results

Growing up surrounded by non-urban environments is associated with lower schizophrenia rates. Upbringing in urban areas is associated with higher schizophrenia rates when compared with non-built-up areas. Schizophrenia risk seems to decrease with vegetation density in a dose-response relationship for urban and agricultural areas. Risk of schizophrenia has been found to be associated additively with green space exposure and genetic liability. No evidence for gene-environment interaction has been reported so far in this regard.

Conclusions

Exposure to green space during childhood appears to lower the risk of developing schizophrenia later in life and can be a preventive strategy. Further research in this area is needed.

Keywords

schizophréniaGreen space
Type
Abstract
Information
European Psychiatry , Volume 64 , Special Issue S1: Abstracts of the 29th European Congress of Psychiatry , April 2021 , pp. S530
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of the European Psychiatric Association
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