Urban–rural differences in incidence rates of psychiatric disorders in Denmark
2015/12/18 by Evangelos Vassos, Esben Agerbo, Ole Mors +1 · 28 citations
Medicine · Environmental Science · #Schizophrenia research and treatment #Maternal Mental Health During Pregnancy and Postpartum #Health, Environment, Cognitive Aging
paper · pdf · doi:10.1192/bjp.bp.114.161091
Abstract
BACKGROUND: People born in densely populated areas have a higher risk of developing schizophrenia, bipolar disorder and autism. AIMS: The purpose of this study was to investigate whether urban-rural differences in place of birth influence a broad range of mental disorders. METHOD: Population-based cohort study of everyone born in Denmark between 1955 and 2006 (n = 2 894 640). Main outcome measures were incidence rate ratios for five levels of urbanisation and summary estimates contrasting birth in the capital with birth in rural areas. RESULTS: For all psychiatric disorders, except intellectual disability (ICD-10 'mental retardation') and behavioural and emotional disorders with onset in childhood, people born in the capital had a higher incidence than people born in rural areas. CONCLUSIONS: Birth in an urban environment is associated with an increased risk for mental illness in general and for a broad range of specific psychiatric disorders. Given this new evidence that urban-rural differences in incidence are not confined to the well-studied psychotic disorders, further work is needed to identify the underlying aetiopathogenic mechanisms.
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