title: Urbanization, urbanicity, and health.
abstract: A majority of the world's population will live in urban areas by 2007. The most rapidly urbanizing cities are in less-wealthy nations, and the pace of growth varies among regions. There are few data linking features of cities to the health of populations. We suggest a framework to guide inquiry into features of the urban environment that affect health and well-being. We consider two key dimensions: urbanization and urbanicity. Urbanization refers to change in size, density, and heterogeneity of cities. Urbanicity refers to the impact of living in urban areas at a given time. A review of the published literature suggests that most of the important factors that affect health can be considered within three broad themes: the social environment, the physical environment, and access to health and social services. The development of urban health as a discipline will need to draw on the strengths of diverse academic areas of study (e.g., ecology, epidemiology, sociology). Cross-national research may provide insights about the key features of cities and how urbanization influences population health.
authors.affiliation: Center for Urban Epidemiologic Studies, New York Academy of Medicine, New York, New York 10029-5293, USA.
authors.forename: David
authors.initials: D
authors.lastname: Vlahov
authors.forename: Sandro
authors.initials: S
authors.lastname: Galea
mesh_terms: D002958:City Planning; D004779:Environment Design; D006297:Health Services Accessibility; D006801:Humans; D011156:Population Density; D012931:Social Environment; D014504:Urban Health; D014507:Urbanization