Int J Health Geogr - Identification of racial disparities in breast cancer mortality: does scale matter?

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Resumo

CKGROUND: This paper investigates the impact of geographic scale (census tract, zip code, and county) on the detection of disparities in breast cancer mortality among three ethnic groups in Texas (period 1995-2005). Racial disparities were quantified using both relative (RR) and absolute (RD) statistics that account for the population size and correct for unreliable rates typically observed for minority groups and smaller geographic units. Results were then correlated with socio-economic status measured by the percentage of habitants living below the poverty level.RESULTS: African-American and Hispanic women generally experience higher mortality than White non-Hispanics, and these differences are especially significant in the southeast metropolitan areas and southwest border of Texas. The proportion and location of significant racial disparities however changed depending on the type of statistic (RR versus RD) and the geographic level. The largest proportion of significant results was observed for the RD statistic and census tract data. Geographic regions with significant racial disparities for African-Americans and Hispanics frequently had a poverty rate above 10.00%.CONCLUSIONS: This study investigates both relative and absolute racial disparities in breast cancer mortality between White non-Hispanic and African-American/Hispanic women at the census tract, zip code and county levels. Analysis at the census tract level generally led to a larger proportion of geographical units experiencing significantly higher mortality rates for minority groups, although results varied depending on the use of the relative versus absolute statistics. Additional research is needed before general conclusions can be formulated regarding the choice of optimal geographic regions for the detection of racial disparities.

Resumo Limpo

ckground paper investig impact geograph scale census tract zip code counti detect dispar breast cancer mortal among three ethnic group texa period racial dispar quantifi use relat rr absolut rd statist account popul size correct unreli rate typic observ minor group smaller geograph unit result correl socioeconom status measur percentag habit live poverti levelresult africanamerican hispan women general experi higher mortal white nonhispan differ especi signific southeast metropolitan area southwest border texa proport locat signific racial dispar howev chang depend type statist rr versus rd geograph level largest proport signific result observ rd statist census tract data geograph region signific racial dispar africanamerican hispan frequent poverti rate conclus studi investig relat absolut racial dispar breast cancer mortal white nonhispan africanamericanhispan women census tract zip code counti level analysi census tract level general led larger proport geograph unit experienc signific higher mortal rate minor group although result vari depend use relat versus absolut statist addit research need general conclus can formul regard choic optim geograph region detect racial dispar

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