IgE-mediated vs non–IgE-mediated food allergy
| Factors consistent with IgE-mediated allergy |
| Onset within 2 hours of ingestion |
| Resolution within 12 hours |
| Vomiting, diarrhea, gastrointestinal pain |
| Symptoms of anaphylaxis (urticaria, angioedema, pruritus, cardiovascular collapse) |
| Acute wheezing, coughing, stridor |
| Factors consistent with non–IgE-mediated allergy or food intolerance |
| Onset hours or days after ingestion |
| Resolution after more than 12 hours; days |
| Nonspecific symptoms (diarrhea, bloody stool, food refusal, colicky pain) |
| Symptoms mainly associated with digestive system |
Compiled from information in references 10 and 11.