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  • Title: Ethnic density effects on birth outcomes and maternal smoking during pregnancy in the US linked birth and infant death data set.
    Author: Shaw RJ, Pickett KE, Wilkinson RG.
    Journal: Am J Public Health; 2010 Apr; 100(4):707-13. PubMed ID: 20167891.
    Abstract:
    OBJECTIVES: We investigated whether mothers from ethnic minority groups have better pregnancy outcomes when they live in counties with higher densities of people from the same ethnic group-despite such areas tending to be more socioeconomically deprived. METHODS: In a population-based US study, we used multilevel logistic regression analysis to test whether same-ethnic density was associated with maternal smoking in pregnancy, low birthweight, preterm delivery, and infant mortality among 581 151 Black and 763 201 Hispanic mothers and their infants, with adjustment for maternal and area-level characteristics. RESULTS: Higher levels of same-ethnic density were associated with reduced odds of infant mortality among Hispanic mothers, and reduced odds of smoking during pregnancy for US-born Hispanic and Black mothers. For Black mothers, moderate levels of same-ethnic density were associated with increased risk of low birthweight and preterm delivery; high levels of same ethnic density had no additional effect. CONCLUSIONS: Our results suggest that for Hispanic mothers, in contrast to Black mothers, the advantages of shared culture, social networks, and social capital protect maternal and infant health.
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