Table 1. Antenatal and delivery data of sampled neonates (n = 149) recruited to the cohort study.

Mean maternal age at recruitment (range)	30.8 years (18–40)
Number of previous live births
0	84 (56.4%)
1	47 (31.5%)
2 or more	18 (12.1%)
Never smoker	86 (57.7%)
Ex-smoker	55 (36.9%)
Current smoker	8 (5.4%)
Asthma	39 (26.2%)
Eczema	25 (16.8%)
Hayfever	54 (36.2%)
Mean gestation (range)	282 days (265-296)
Mean birth weight (range)	3590 grams (2430- 690)
Mean Occipital - frontal circumference (range)	34.8 cms (31- 8)