Mean SD Median IQR
Maternal Height (cm) 164.3 6.6 164.0 160.0 - 169.0
Maternal Weight (kg) 71.4 16.9 68.0 60.0 - 80.0
Body Mass Index (kg/m²) 26.5 5.9 25.2 22.2 - 29.4
n %
Parity
0 658,800 41.9
1 544,685 34.6
2 226,028 14.4
3+ 143,304 9.1
BMI > 35 kg/m² 144,035 9.2
Ethnicity
British European 1,110,717 70.6
East European 100,589 6.4
Other European 36,953 2.3
South Asian 136,634 8.7
Other Asian 34,586 2.2
African 45,897 2.9
Mixed 15,007 1.0
Other 92,434 5.9
Preterm (<37 weeks) 101,336 6.4
(<34 weeks) 23,253 1.5
Stillbirth 6569 4.18 /1000
Mean SD Median IQR
Gestation (days) 275.8 12.9 277 270 - 284
Birthweight (grams) 3352 565 3375 3025 - 3720
Customised Centile 45.2 29.7 42.6 18.8 - 70.3