Green city : Why nature matters to health, an evidence review

In all of the health outcomes, the studies that did not find a statistically significant relationship between green space and health had a lower quality than the ones that found a significant relationship. [...] Reviews and synthesis of the green space and health studies (Table 1) have been increasing over the last 10 years and the overwhelming evidence shows statistically significant relationships between health outcomes and green space. [...] This report provides findings of a systematic meta-narrative review of the evidence, focused on answering the following questions about the relationship between green space and health: Does green space impact health outcomes? [...] Table 2 shows the range of topics explored in the articles reviewed: the type of engagement with green space, the health measure of interest and sub-populations of focus, if any. [...] There were several common limitations found in the studies, which included: A lack of a clear definition of green space and a lack of agreement between studies regarding the definition; Lack of the use of accurate measures; for example, some studies relied on perception of green space only, rather than using defined indices such as the Normalized Difference Vegetation Index (NDVI); and A rel