Table 2. Causes of immediate-type food allergy in Korean children depending on the age groups.

	< 2 years	2-6 years	7-12 years	13-18 years
Sample size	1,073	331	76	29
1st	Cow's milk (37.1%)	Walnut (16.6%)	Walnut (13.2%)	Buckwheat (17.2%)
2nd	Hen's egg (34.3%)	Hen's egg (15.4%)	Buckwheat (9.2%)	Wheat (10.3%)
3rd	Wheat (8.3%)	Cow's milk (11.2%)	Peanut (6.6%)	Shrimp (10.3%)
4th	Walnut (4.0%)	Peanut (9.7%)	Wheat (6.6%)
5th	Peanut (3.7%)	Wheat (8.5%)	Crab (6.6%)
6th	Soybean (1.8%)	Almond (5.1%)	Apple (6.6%)
7th	Pine nut (0.9%)	Pine nut (3.6%)	Hen's egg (5.3%)
8th	Shrimp (0.9%)	Buckwheat, Kiwi (3.0% each)	Shrimp (5.3%)

<2 years and 2–6 years: causative foods with ≥10 cases were included in this table; 7–12 years and 13–18 years: causative foods with ≥3 cases were included in this table.