|
Age (years): mean (range;SD)
|
28.7 (14–52; 6)
|
27.5 (13–32; 6.6)
|
P = 0.61
|
|
Teenage pregnancy = Yes : %(n)
|
6.9 (2031)
|
12.4 (579)
|
P < 0.001
|
|
Maternal age > 35 years = Yes: %(n)
|
18.0 (5321)
|
16.4 (769)
|
P = 0.011
|
|
Parity: mean
|
0.85
|
1.14
|
P < 0.001
|
|
White ethnicity = No: %(n)
|
16.3 (4750)
|
37.4 % (1668)
|
P < 0.001
|
|
Maternal employment = No: %(n)
|
23.9 (4263)
|
52 (1254)
|
P < 0.001
|
|
Paternal employment = No: %(n)
|
4.8 (753)
|
12.4 (227)
|
P < 0.001
|
|
IMD score % (n)
|
5.9 (1068)
|
10.4 (1875)
|
=0.031
|
|
Smoking status = Yes: %(n)
|
14.7 (4348)
|
18.8 (873)
|
P < 0.001
|
|
Body mass index (kg/m2): mean (range, SD)
|
25.6 (17.5–52; 4.7)
|
26.3 (17.6–54; 4.6)
|
P = 0.357
|
