Table 2.

Prevalence of self-reported FA in Vietnam

	Self-reported FA			Doctor-diagnosed FA			IgE-mediated FA
	Web-based survey	Paper-based survey	Difference, P	Web-based survey	Paper-based survey	Difference, P	Web-based survey	Paper-based survey	Difference, P
Any food	27.8 (25.7–29.8)	18.0 (17.2–18.8)	0.0000	5.7 (4.6–6.7)	5.8 (5.4–6.3)	0.7795	4.1 (3.2–5.0)	4.1 (3.7–4.6)	0.9590
Crustacean	13.8 (12.2–15.4)	9.5 (8.9–10.1)	0.0000	3.3 (2.5–4.2)	3.5 (3.2–3.9)	0.6928	2.6 (1.9–3.4	2.6 (2.3–3.0)	0.6277
Fish	11.0 (9.6–12.4)	4.8 (4.3–5.2)	0.0000	2.4 (1.7–3.1)	1.9 (1.6–2.2)	0.1233	1.7 (1.1–2.3)	1.6 (1.3–1.8)	0.3281
Mollusk	8.9 (7.6–10.2)	4.7 (4.3–5.2)	0.0000	2.0 (1.4–2.6)	1.7 (1.4–2.0)	0.3829	1.6 (1.0–2.2)	1.3 (1.1–1.6)	0.8912
Beef	3.0 (2.2–3.8)	2.5 (2.2–2.9)	0.2314	1.1 (0.6–1.6)	1.1 (0.9–1.3)	0.9829	0.8 (0.4–1.2)	0.8 (0.7–1.0)	0.0194
Milk	3.5 (2.7–4.3)	2.5 (2.2–2.9)	0.0186	0.5 (0.2–0.9)	0.8 (0.6–1.0)	0.2612	0.2 (0.0–0.4)	0.7 (0.5–0.8)	0.9465
Egg	2.2 (1.5–2.8)	1.2 (0.9–1.4)	0.0007	0.5 (0.2–0.9)	0.5 (0.4–0.6)	0.8182	0.4 (0.1–0.7)	0.4 (0.5–0.8)	0.7748
Wheat	2.1 (1.4–2.7)	1.2 (0.9–1.4)	0.0019	0.4 (0.1–0.7)	0.4 (0.3–0.6)	0.7933	0.3 (0.0–0.5)	0.3 (0.2–0.4)	0.1638
Peanut	1.4 (0.9–1.9)	1.2 (1.0–1.5)	0.5668	0.2 (0.0–0.3)	0.4 (0.3–0.5)	0.1485	0.1 (0.0–0.3)	0.3 (0.2–0.4)	0.6999
Soy	0.8 (0.4–1.2)	0.9 (0.7–1.1)	0.7485	0.3 (0.0–0.5)	0.3 (0.2–0.5)	0.6664	0.2 (0.0–0.4)	0.3 (0.2–0.4)	0.4565
Tree nut	1.6 (1.0–2.1)	1.1 (0.9–1.3)	0.0879	0.2 (0.0–0.4)	0.3 (0.2–0.4)	0.4533	0.2 (0.0–0.3)	0.3 (0.2–0.4)	0.0063
Other foods	10.0 (8.7–11.4)	3.0 (2.7–3.4)	0.0000	1.8 (1.2–2.4)	0.8 (0.6–1.0)	0.0002	1.2 (0.7–1.7)	0.6 (0.5–0.8)	0.9397

Values reported as % (95% CI).

The Two-sample z-test for the Difference Between Proportions was performed to obtain P values.