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Table 1 Background data of the study population (N = 606)

From: Atopic heredity modifies the association between maternal vitamin D status in pregnancy and the risk of atopic disease in childhood: an observational study

Maternal variables Mean ± SD or N (%)
Age T1 (years) 32 ± 4.4
BMI T1 (kg/m2) 23.8 ± 3.5
25OHD T1 (nmol/L) 70.2 ± 20.9
25OHD T3 (nmol/L) 85.0 ± 27.2
Dietary vitamin D intake T3 (µg/day) 4.4 ± 2.2
Vitamin D supplement use T1 and/or T3 (yes) 375 (62)
University level education (yes) 467 (77)
Northern European origin (yes) 536 (88)
Child variables
  Sex (female) 291 (48)
  Birth weight (g) 3540 ± 527
  Delivery by cesarean section (yes) 84 (14)
  Tobacco exposure in utero (yes) 33 (5)
  Reported atopic heredity (yes) 189 (31)
  Reported asthma (yes) 76 (13)
  Reported eczema (yes) 133 (22)
  Reported food allergy (yes, any) 111 (18)
  Cow’s milk 60 (10)
  Egg 26 (4)
  Fish 8 (1)
  Nuts 15 (3)
  Peanut 13 (2)
  Cashew nut 11 (2)
  Pea 2 (0.5)
  Soy 6 (1)
  Cereals 9 (2)
  Stone fruit 11 (2)
  Citrus fruit 4 (1)
  Other 42 (7)
  1. 25OHD 25-hydroxyvitamin D, T1 early pregnancy, T3 late pregnancy, BMI Body Mass Index, SD Standard deviation