Table 1.

Table showing cohort characteristics of the participants in the smaller and extended sample sets.

Characteristic	% or mean (standard deviation) for smaller sample (n=366)	% or mean (standard deviation) for extended sample (n=696)
Maternal age at child's birth	30.5 (3.6)	30.8 (3.6)
Maternal pre-pregnancy BMI	25.3 (4.4)	25.2 (4.4)
Maternal smoking during pregnancy	12.9%	12.3%
Maternal atopy	43.6%	42.9%
Female child	47.0%	47.3%
Birthweight in grams	3463 (489)	3500 (501)
Ever breastfed	86.6%	85.6%
Atopic eczema at 12 months	12.6% (cases=46)	11.3% (cases=76)
Doctor diagnosed asthma at 3 yrs	5.8% (cases=21)	5.9% (cases=34)
Atopy at 3 yrs	16.0% (cases=48)	16.3% (cases=76)
Atopic eczema at 6-7 yrs	16.8% (cases=53)	16.3% (cases=102)
Doctor diagnosed asthma at 6-7 yrs	12.9% (cases=47)	14.3% (cases=86)
Atopy at 6-7 yrs	22.6% (cases=60)	24.0% (cases=104)