American Journal of Epidemiology Vol. 143, No. 4: 333-337
Copyright © 1996 by The Johns Hopkins University School of Hygiene and Public Health
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Relation of Maternal Race to the Risk of Preterm, Non-Low Birth Weight Infants: a Population Study
Department of Pediatrics, Northwestern University Medical School, and Division of Neonatology, Children's Memorial Hospital Chicago, IL
Reprint requests to Dr.James W.Collins, Jr., Division of Neonatology, Children's Memorial Hospital, 2300 Children's Plaza, Chicago, IL 60614.
The authors used 19821983 Illinois vital records and 1980 US Census income data to determine the contribution of maternal race to the risk of preterm (<260 days), non-low birth weight (>2,500 g) infants. This older cohort was chosen to avoid the confounding effect of cocaine associated with its increased local availability after 1985. In Chicago, the unadjusted preterm, non-low birth weight rate was 14% for African Americans (n = 43,059) compared with 9% for Mexican Americans (n = 10,397) and 7% for whites (n = 26,152) (odds ratio = 1.7, 95% confidence interval 1.6-1.8; odds ratio = 2.4, 95% confidence interval 2.32.5, respectively). In logistic models that included maternal sociodemographic and prenatal care variables, the adjusted odds ratio of preterm, non-low birth weight for African Americans compared with Mexican Americans and whites was 1.6 (95% confidence interval 1.41.8) and 1.5 (95% confidence interval 1.21.7), respectively. The authors conclude that some factor closely linked to the African-American race, not underserved minority status per se, is a fundamental cause of preterm, non-low birth weight.
blacks; infant; low birth weight; infant; premature
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