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Author (up) Hjalgrim, L.L.; Westergaard, T.; Rostgaard, K.; Schmiegelow, K.; Melbye, M.; Hjalgrim, H.; Engels, E.A. url  openurl
  Title Birth weight as a risk factor for childhood leukemia: a meta-analysis of 18 epidemiologic studies Type Journal Article
  Year 2003 Publication American Journal of Epidemiology Abbreviated Journal Am J Epidemiol  
  Volume 158 Issue 8 Pages 724-735  
  Keywords Adolescent; Adult; *Birth Weight; Child; Child, Preschool; Confidence Intervals; Humans; Infant; Infant, Newborn; Precursor Cell Lymphoblastic Leukemia-Lymphoma/*epidemiology/etiology; Registries; Risk Factors  
  Abstract Evidence has emerged that childhood leukemia is initiated in utero. High birth weight is one of the few birth-related factors that has been associated with childhood leukemia, albeit not consistently. The authors conducted a meta-analysis of studies of the association between birth weight and childhood leukemia risk. Study-specific odds ratios for leukemia were calculated, using a cutoff at 4,000 g of birth weight. The authors also evaluated whether the association between birth weight and leukemia followed a log-linear dose-response-like pattern. They calculated summary estimates using weighted averages of study-specific odds ratios from dichotomous and trend analyses. Eighteen studies (published between 1962 and 2002) were included, encompassing 10,282 children with leukemia. Children weighing 4,000 g or more at birth were at higher risk of acute lymphoblastic leukemia than children weighing less (odds ratio (OR) = 1.26, 95% confidence interval (CI): 1.17, 1.37). Furthermore, data were consistent with a dose-response-like effect (OR = 1.14/1,000-g birth weight increase, 95% CI: 1.08, 1.20). Studies of acute myeloid leukemia indicated a similar increase in risk for children weighing 4,000 g or more at birth (OR = 1.27, 95% CI: 0.73, 2.20) and a dose-response-like effect (OR = 1.29/1,000 g, 95% CI: 0.80, 2.06), but results varied across studies. Our findings support a relation between birth weight and childhood acute lymphoblastic leukemia risk and emphasize the need for additional studies of the biologic mechanisms underlying this association.  
  Address Department of Epidemiology Research, Danish Epidemiology Science Center, Statens Serum Institut, Copenhagen, Denmark.  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0002-9262 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:14561661 Approved no  
  Call Number CBM.UAM @ ccobaleda @ Serial 634  
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