Table 4. Patients with chronic urticaria and positive reactions to oral food challenge tests.

No.	Age (yr)	Sex	Duration (mo)	History of hypersensitivity	Food-specific IgE (Class)	Oral food challenge	Challenge results	Other symptoms
1	15	Male	12	None	Pork (2)	Pork	Wheals, pruritus (20 minutes later)	None
2	44	Male	2	Pork	Pork (2)	Pork	Wheals, pruritus (immediate)	None
3	26	Female	12	None	Pork (2)	Pork	Wheals, pruritus (2 hours later)	None
4	28	Male	36	Crab	Crab (3), rice (3), garlic (6), onion (2)	Crab, rice, garlic, onion	Crab-wheals, pruritus (immediate)	None