Table 2. Univariate and multivariable analysis of demographics, atopic history, and investigation parameters with peanut allergy.

Variable		Unadjusted OR (95% CI)*	p value	Adjusted OR (95% CI)†	p value
Demographics
	Male sex	0.70 (0.39–1.25)	0.228	0.68 (0.38–1.23)	0.200
	Age (yr)	1.57 (0.89–2.78)	0.122	1.18 (0.64–2.18)	0.598
	Race, Chinese	1.12 (0.62–2.03)	0.709	1.03 (0.56–1.88)	0.936
History of atopy
	Rhinitis‡	2.52 (1.42–4.47)	<0.01	2.39 (1.30–4.38)	<0.01
	Atopic dermatitis‡	0.82 (0.41–1.63)	0.575	0.80 (0.40–1.62)	0.541
	Asthma§	1.31 (0.61–2.81)	0.482	0.90 (0.40–2.02)	0.792
	Drug allergy‡	0.70 (0.23–2.16)	0.534	0.45 (0.14–1.46)	0.182
	Urticaria/angioedema‡	0.61 (0.27–1.36)	0.223	0.67 (0.29–1.53)	0.345
	Tree nut sensitisation∥	1.38 (0.73–2.60)	0.324	1.33 (0.70–2.54)	0.378
	Other food allergies∥	1.57 (0.89–2.76)	0.118	1.57 (0.87–2.84)	0.132
Investigation results
	SPT wheal size (mm)¶	4.68 (2.32–9.41)	<0.01	1.32 (1.20–1.45)	<0.01
	IgE to peanut (kU/L)¶	1.96 (0.63–6.11)	0.244	1.09 (1.02–1.17)	<0.05

OR, odds ratio; CI, confidence interval; SPT, skin prick test.

^*Odds ratio (OR) using univariate logistic regression analysis. ^†Odds ratio using multivariable logistic regression analysis; adjusted for age and rhinitis. ^‡Parental report of patient's history of rhinitis, atopic dermatitis, drug allergy, and urticaria/angioedema. ^§Physician-diagnosed asthma. ^∥Clinical diagnosis of food allergy based on clinical history and positive SPT/IgE. ^¶Odds ratio is reported for the risk of SPT ≥ 3 mm, and serum IgE ≥ 0.35 kU/L.