Table 2:
Characteristics of Lifetime Allergy Symptoms in IgG4-Related Disease
| Features of Allergy Symptoms | Frequency |
|---|---|
| Any Allergy Symptoms (N, %) | 165 (71%) |
| Aero-Allergen Symptoms | |
| History of Aero-Allergen Symptoms | 135 (58%) |
| Self-reported allergy symptoms | 129 (56%) |
| Occurred in the last 12 months† | 86 (41%) |
| Physician-diagnosed allergies | 87 (38%) |
| Self-reported and physician-diagnosed allergies | 81 (35%) |
| Underwent Aero-Allergen Sensitization Testing | 101 (44%) |
| Reported Allergen | |
| Seasonal allergens (e.g., grass, pollen) | 32 (14%) |
| Pet dander (e.g., cats, dogs) | 18 (8%) |
| Mold | 10 (4%) |
| Dust mites | 17 (7%) |
| Other | 28 (12%) |
| Food Allergy Symptoms and Hypersensitivities (N, %) | |
| History of Food Allergy Symptoms/Hypersensitivities | 47 (20%) |
| Self-reported allergy symptoms | 43 (19%) |
| Physician-diagnosed allergies | 32 (14%) |
| Self-reported and physician-diagnosed allergies | 28 (12%) |
| Underwent Food Allergen Testing | 36 (16%) |
| Reported Allergen/Hypersensitivity | |
| Dairy/lactose | 1 (< 1%) |
| Nuts | 3 (1%) |
| Shellfish | 3 (1%) |
| Other | 12 (5%) |
| Skin Allergy Symptoms (N, %) | |
| History of Skin Allergy Symptoms | 97 (42%) |
| Self-reported contact dermatitis symptoms | 47 (20%) |
| Self-reported eczema symptoms | 39 (17%) |
| Any physician-diagnosed allergy | 59 (26%) |
| Self-reported and physician-diagnosed allergies | 32 (14%) |
| Attributed Causes of Contact Dermatitis* | |
| Latex | 12 (5%) |
| Chemicals/perfumes | 8 (3%) |
| Plants/trees | 4 (2%) |
| Nickel/other metals | 1 (< 1%) |
| Other | 17 (7%) |
| Anaphylaxis (N, %) | 20 (9%) |
| Allergy Symptoms Following IgG4-RD Onset (N, %) | |
| Improved | 31 (19%) |
| No Change | 101 (61%) |
| Worsened | 16 (10%) |
| Other or Not Reported | 17 (10%) |
*
% of self-reported contact dermatitis
†
Data missing in 20 subjects