How can you explain these results?
The most obvious take is that 200 year was not long enough to evolve all humans into city dwellers at the psych level. Perhaps a lot of us were selected to live in small communities in rural areas and within the past 200 years were urbanized.
>https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3494055/
>The association between urbanicity and risk of schizophrenia is well established. The incidence of schizophrenia has been observed to increase in line with rising levels of urbanicity, as measured in terms of population size or density.
>In this study, we undertook to express the effect of urbanicity on the risk of schizophrenia in a linear form and to perform a meta-analysis of all available evidence.
>Despite the challenges that arise from differences between studies as regards to the number and relative size of urbanicity levels, a linear association was observed between the logarithm of the odds of risk for schizophrenia and urbanicity.
>The risk for schizophrenia at the most urban environment was estimated to be 2.37 times higher than in the most rural environment. The same effect was found when studies measuring the risk for nonaffective psychosis were included.
The most obvious take is that 200 year was not long enough to evolve all humans into city dwellers at the psych level. Perhaps a lot of us were selected to live in small communities in rural areas and within the past 200 years were urbanized.
>https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3494055/
>The association between urbanicity and risk of schizophrenia is well established. The incidence of schizophrenia has been observed to increase in line with rising levels of urbanicity, as measured in terms of population size or density.
>In this study, we undertook to express the effect of urbanicity on the risk of schizophrenia in a linear form and to perform a meta-analysis of all available evidence.
>Despite the challenges that arise from differences between studies as regards to the number and relative size of urbanicity levels, a linear association was observed between the logarithm of the odds of risk for schizophrenia and urbanicity.
>The risk for schizophrenia at the most urban environment was estimated to be 2.37 times higher than in the most rural environment. The same effect was found when studies measuring the risk for nonaffective psychosis were included.
