Table 1.

Distribution of study children according to age and gender and presence of selective IgA deficiency.

Age (years)	Girls		Boys		All
	n	%	n	%	n	%
11	173	17.3	166	16.6	339	33.9
12	159	15.9	175	17.5	334	33.4
13	164	16.4	163	16.3	327	32.7
11–13	496	49.6	504	50.4	1000	100.0
IgA deficiency*	1	0.2	3	0.6	4	0.4

^*Based on the final diagnosis at the tertiary hospital.