Table 1. Demographic and clinical characteristics of peanut allergy and peanut tolerant groups.
| Variable | Peanut allergy (PA) (n = 269) | Peanut tolerant (PT) (n = 59) | p value† | |
|---|---|---|---|---|
| Demographics | ||||
| Male sex | 145 (53.9)* | 37 (62.7) | 0.218 | |
| Age (yr) | 3.9 ± 3.2 | 3.7 ± 3.3 | 0.633 | |
| Race, Chinese | 184 (68.4) | 39 (66.1) | 0.732 | |
| History of atopy | ||||
| Rhinitis∥ | 171 (63.6) | 24 (40.7) | <0.01 | |
| Atopic dermatitis∥ | 204 (75.8) | 47 (79.7) | 0.530 | |
| Asthma¶ | 53 (19.7) | 9 (15.3) | 0.429 | |
| Drug allergy∥ | 14 (5.2) | 4 (6.8) | 0.630 | |
| Urticaria/angioedema∥ | 27 (10.1) | 9 (15.3) | 0.250 | |
| Tree nut sensitisation | 87 (32.3) | 15 (25.4) | 0.299 | |
| Other food allergies** | 149 (55.4) | 26 (44.1) | 0.114 | |
| Investigation results | ||||
| SPT wheal size (mm) | 10.2 ± 5.5 | 5.2 ± 3.3 | <0.01 | |
| IgE to peanut (kU/L) | 22.8 ± 30.7 | 7.6 ± 19.3 | <0.05 | |
Values are presented as number (%) or mean ± standard deviation.
SPT, skin prick test.
†Comparing the 2 groups (PA and PT); 2-sided 2 independent sample t test for continuous variables and chi-square/Fisher exact test for categorical variables. ∥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.