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Table 4 Multivariate linear regression model: R2: 0.62; F: 14.1; p: 0.000

From: Assessment of ten trace elements in umbilical cord blood and maternal blood: association with birth weight

  B p value 95 % CI
Lower Upper
(Constant) −8975.79 0.000 −13,126.51 −4825.08
Gestational age (weeks) 350.14 0.000 244.53 455.76
Maternal smokingb −483.84 0.005 −811.69 −155.98
Sexa −374.00 0.009 −647.97 −100.04
Anemiab 361.95 0.038 20.84 703.06
Umbilical cord Cu (µM/L) −146.39 0.009 −255.04 −37.74
Umbilical cord Mn (nM/L) −0.98 0.640 −5.26 3.27
  1. Independent variables: Cu and Mn umbilical cord concentrations, gestational age, maternal smoking, sex and anemia
  2. Dependent variable: birth weight (g). p value <0.05 statistical significance
  3. aReference group = male
  4. bVariables dichotomous (0 = not or 1 = yes). Reference group = 0
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