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Fig. 5 | BMC Public Health

Fig. 5

From: Suburbanisation of oral cavity cancers: evidence from a geographically-explicit observational study of incidence trends in British Columbia, Canada, 1981–2010

Fig. 5

Metro Vancouver 2006 census geographical units where over 25 % of residents are ages 65+ and/or born in India, China, or Taiwan. New oral cancer case concentrations since the 1990s are approximated by white ellipses, found exclusively on the urban periphery. The observed increase in age-standardised incidence rates in suburban areas may be explained by the high percentage of immigrant populations from India, China, and Taiwan, where consumption of betel quid/areca nut is high

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