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)	0.2276	0.68 (0.38–1.23)	0.1995
	Age (yr)	1.57 (0.89–2.78)	0.1219	1.18 (0.64–2.18)	0.5978
	Race, Chinese	1.12 (0.62–2.03)	0.7088	1.03 (0.56–1.88)	0.9355
History of atopy
	Rhinitis‡	2.52 (1.42–4.47)	0.0016	2.39 (1.30–4.38)	0.0050
	Atopic dermatitis‡	0.82 (0.41–1.63)	0.5745	0.80 (0.40–1.62)	0.5405
	Asthma§	1.31 (0.61–2.81)	0.4817	0.90 (0.40–2.02)	0.7915
	Drug allergy‡	0.70 (0.23–2.16)	0.5340	0.45 (0.14–1.46)	0.1819
	Urticaria/angioedema‡	0.61 (0.27–1.36)	0.2228	0.67 (0.29–1.53)	0.3450
	Tree nut allergies∥	1.38 (0.73–2.60)	0.3235	1.33 (0.70–2.54)	0.3779
	Other food allergies∥	1.57 (0.89–2.76)	0.1184	1.57 (0.87–2.84)	0.1324
Investigation results
	SPT wheal size (mm)¶	4.68 (2.32–9.41)	<0.0001	1.32 (1.20–1.45)	<0.0001
	IgE to peanut (kU/L)¶	1.96 (0.63–6.11)	0.2438	1.09 (1.02–1.17)	0.0144

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

^*Odds ratio 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 tree nut/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.