Impact of Immigration and Duration of Residence in US on Length of Gestation Among Black Women in Newark, New Jersey
Little is known about pregnancy outcomes of black immigrant women to the US. We surveyed 447 black women post-partum in two hospitals in Newark, NJ. Length of gestation was obtained from medical records. Covariates and information on immigration were collected by in-person interview. Risks ratios for preterm birth (< 37 weeks) comparing immigrant to US-born women were calculated using log-binomial regression. Associations with gestational age at delivery were estimated using linear regression. Multivariable models adjusted for socioeconomic and social/behavioral variables. Immigrant women relative to US-born women had a 60% lower risk of preterm birth (adjusted risk ratio = 0.4; 95% confidence interval (CI) 0.2, 0.8) and longer gestation (adjusted difference = 1.4 weeks, 95%CI 0.6, 2.1). Gestation was 1.9 weeks longer for recent immigrants compared to US-born women (95%CI 0.2, 3.6), whereas for those who lived in the US for at least 10 years there was no difference. The healthy immigrant effect found among black immigrants may erode with time in the US.
KeywordsBlack immigrants Preterm birth Duration of residence Length of gestation
- 1.Hamilton BE, Martin JA, Osterman MJK, et al. Births: final data for 2014. Natl Vital Stat Rep. 2015;64(12):1–64.Google Scholar
- 2.Hamilton BE, Martin JA, Osterman MJK, et al. Births: provisional data for 2016. Vital statistics rapid release. vol 2. Hyattsville, MD: National Center for Health Statistics. https://www.cdc.gov/nchs/data/vsrr/ report002.pdf. Accessed 21 Sept 2017.
- 21.Jamner M, Schneider, Stokols D, editors Promoting human wellness: new frontiers for research, practice, and policy. Berkeley: University of California Press. 2000. http://ark.cdlib.org/ark:/13030/kt4r29q2tg/.
- 22.Guendelman SD, Ritterman-Weintraub ML, Fernald LCH, Kaufer-Horwitz M. Weight status of Mexican immigrant women: a comparison with women in Mexico and with US-born Mexican American women. Am J Public Health. 2013;103(9):1634–40. https://doi.org/10.2105/AJPH.2012.301171.CrossRefPubMedPubMedCentralGoogle Scholar
- 24.Anderson M. (2015). African immigrant population in U.S. steadily climbs. Pew research center. http://www.pewresearch.org/fact-tank/2017/02/14/african-immigrant-population-in-u-s-steadily-climbs/. Accessed 9 Mar 2018.
- 25.United States Census Bureau. Selected characteristics of the native and foreign-born populations: 2011–2015 American community survey 5-year estimates. U.S. Census Bureau, 2011–2015 American community survey 5-year estimates. 2015. https://factfinder.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=ACS_15_5YR_S0501&prodType=table. Accessed 18 Oct 2017.
- 26.Amasha H, Jaradeh M. Effect of active and passive smoking during pregnancy on its outcomes. Health Sci J. 2012;6:335–52.Google Scholar
- 28.Tian L, Liu K, Spiegelman D, Hertzmark E. Re: Easy SAS calculations for risk or prevalence ratios and differences. Am J Epidemiol. 2005;162:1157–8; author reply 1159–61.Google Scholar
- 29.Institute of Medicine (US) Committee on Understanding Premature Birth and Assuring Healthy Outcomes, Behrman RE, Butler AS, editors. Preterm birth: causes, consequences, and prevention. Washington, DC: National Academies Press, US; 2007. http://www.ncbi.nlm.nih.gov/books/NBK11365/. Accessed 14 Sept 2017.
- 32.Luo Z-C, Wilkins R, Kramer MS, for the Fetal and Infant Health Study Group of the Canadian Perinatal Surveillance System. Effect of neighbourhood income and maternal education on birth outcomes: a population-based study. CMAJ 2006;174(10):1415–20. https://doi.org/10.1503/cmaj.051096.CrossRefPubMedPubMedCentralGoogle Scholar