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  • Title: Are birth defects among Hispanics related to maternal nativity or number of years lived in the United States?
    Author: Ramadhani T, Short V, Canfield MA, Waller DK, Correa A, Royle M, Scheuerle A, National Birth Defects Prevention Study (NBDPS).
    Journal: Birth Defects Res A Clin Mol Teratol; 2009 Sep; 85(9):755-63. PubMed ID: 19350653.
    Abstract:
    BACKGROUND: Literature on the risk of birth defects among foreign- versus U.S.-born Hispanics is limited or inconsistent. We examined the association between country of birth, immigration patterns, and birth defects among Hispanic mothers. METHODS: We used data from the National Birth Defects Prevention Study and calculated odds ratios (ORs) and 95% confidence intervals and assessed the relationship between mothers' country of birth, years lived in the United States, and birth defects among 575 foreign-born compared to 539 U.S.-born Hispanic mothers. RESULTS: Hispanic mothers born in Mexico/Central America were more likely to deliver babies with spina bifida (OR = 1.53) than their U.S.-born counterparts. Also, mothers born in Mexico/Central America or who were recent United States immigrants (< or =5 years) were less likely to deliver babies with all atrial septal defects combined, all septal defects combined, or atrial septal defect, secundum type. However, Hispanic foreign-born mothers who lived in the United States for >5 years were more likely to deliver babies with all neural tube defects combined (OR = 1.42), spina bifida (OR = 1.89), and longitudinal limb defects (OR = 2.34). Foreign-born mothers, regardless of their number of years lived in the United States, were more likely to deliver babies with anotia or microtia. CONCLUSIONS: Depending on the type of birth defect, foreign-born Hispanic mothers might be at higher or lower risk of delivering babies with the defects. The differences might reflect variations in predisposition, cultural norms, behavioral characteristics, and/or ascertainment of the birth defects.
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