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Inducible urticaria according to challenge testing and anti-TPO IgE. Comparison of patients with or without anti-TPO IgE according inducible urticaria.
| Inducible urticaria according to challenge testing | (+) anti-TPO IgE (n = 43) |
(-) anti-TPO IgE (n = 57) |
p |
|---|---|---|---|
| Patients with any inducible urticaria | 10 (23.2%) | 24 (42.1%) | 0.03 |
| Dermographism | 7 (16.2%) | 17 (29.8%) | 0.03 |
| Pressure | 1 (2.3%) | 5 (8.7%) | 0.04 |
| Ice | 2 (4.6%) | 10 (17.5%) | 0.02 |
| Water | 0 | 0 | N/A |
| Exercise/cholinergic | 0 | 2 | N/A |
