Table 3. Odds ratios of peanut allergy in relation to infantile peanut introduction.

	Number/Total number	(%)	Crude OR or RD	95% CI	Adjusted OR or RDa	95% CI
Total
Infantile peanut introduction
Yes	3/3,294	0.09	0.47	0.15–1.47	0.53	0.17–1.68
No	126/64,518	0.20	ref		ref
Risk difference			−0.0010	−0.0021 to 0.00	−0.0009	−0.0016 to 0.0013
Without infantile eczema
Infantile peanut introduction
Yes	3/3,179	0.09	0.56	0.18–1.77	0.65	0.20–2.05
No	104/61,936	0.17	ref		ref
Risk difference			−0.0007	−0.0019 to 0.0004	−0.0006	−0.0013 to 0.0018
With infantile eczema
Infantile peanut introduction
Yes	0/115	0.00	N/A		N/A
No	22/2,582	0.85
Risk difference			−0.0085	−0.0121 to −0.0050	N/A

CI, confidence interval; N/A, not applicable; OR, odds ratio; RD, risk difference.

^aAdjusted for maternal history of allergy, passive smoking, maternal peanut intake during pregnancy, house income, mode of delivery, child sex, older siblings, and infantile eczema (unless stratified by the factor).