Definite | Allergen found in patient's products/environment, dermatitis corresponds to point of contact with allergen, use test is positive or patch test positive to product, dermatitis improved with removal of the allergen or recurred with rechallenge (provocative use test) |
Probable | Allergen present in products/environment and clinical presentation consistent with allergy |
Possible | Patient was likely exposed to allergen in products/environment |
Unknown | No evidence of current or past exposure |
Past | Allergen found in past environment and patient had reaction to allergen in the past |
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