Table 2. Proportions with the four western blot patterns according to age groups.

Target proteins		No. (%) of children by age group
		0–4 yr	5–9 yr	10–15 yr
CagA	IgG	35 (26.5)	100 (36.5)	48 (46.6)
	IgA	15 (11.4)	51 (18.6)	24 (23.3)
Urease	IgG	72 (54.5)	133 (48.5)	38 (36.9)
	IgA	39 (29.5)	97 (35.4)	36 (35.0)
Other proteins	IgG	7 (5.3)	17 (6.2)	4 (3.9)
	IgA	52 (39.4)	51 (18.6)	17 (16.5)
No band	IgG	18 (13.6)	24 (8.8)	13 (12.6)
	IgA	26 (19.7)	75 (27.4)	26 (25.2)