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Table 1 Description of the study population characteristics (n = 141)

From: Weight and head circumference at birth in function of placental paraben load in Belgium: an ENVIRONAGE birth cohort study

Characteristic mean (SD) no. %
Mother
 age (years) 30.3 (4.3)   
 pre-gestational body mass index 25.2 (5.0)   
educational level
 Low   16 11.5
 Middle   53 37.6
 High   72 51.1
Parity
 1   63 44.6
 2   56 39.8
 3   22 15.6
smoking behaviour
 never smoked   98 69.5
 before pregnancy   33 23.4
 during pregnancy   10 7.1
Newborn
 sex, male   74 52.5
 gestational age (weeks) 39.5 (1.1)   
 birth weight (g) 3463 (405)   
 birth length (cm) 50.4 (1.8)   
 head circumference (cm) 34.4 (1.3)   
 placental weight (g) 510 (103)