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