Table 1.

Prevalence of allergic diseases in Korean adolescents (n = 75,643)

Variable	Asthma		Allergic rhinitis		Atopic dermatitis
	Prevalence, % (S.E.)	p-value	Prevalence, % (S.E.)	p value	Prevalence, % (S.E.)	p-value
Total population	11.1 (0.1)		33.9 (0.3)		23.1 (0.2)
Sex		0.02*		0.10		0.00*
Boy	10.8 (0.2)		34.2 (0.3)		20.3 (0.2)
Girl	11.4 (0.2)		33.5 (0.3)		26.2 (0.2)
Residence		0.71		0.00*		0.00*
District	11.9 (0.4)		26.3 (0.8)		20.8 (0.6)
Small and Medium city	11.1 (0.2)		35.2 (0.4)		23.2 (0.3)
Large city	11.0 (0.2)		33.4 (0.3)		23.3 (0.3)
FASa		0.09		0.00*		0.00*
Low	10.8 (0.2)		29.5 (0.4)		21.7 (0.3)
Middle	11.0 (0.2)		33.9 (0.3)		23.1 (0.3)
High	11.5 (0.2)		38.0 (0.4)		24.4 (0.3)
Paternal education		0.00*		0.00*		0.00*
Middle or less	12.5 (0.5)		28.9 (0.8)		20.4 (0.7)
High school	11.1 (0.2)		32.1 (0.4)		22.8 (0.3)
College or higher	11.2 (0.2)		38.3 (0.4)		24.6 (0.3)
Unknown	9.2 (0.3)		25.8 (0.5)		19.9 (0.4)
Maternal education		0.00*		0.00*		0.00*
Middle or less	11.5 (0.5)		29.9 (0.9)		20.8 (0.7)
High school	11.2 (0.2)		33.4 (0.3)		23.3 (0.2)
Bachelor or higher	11.2 (0.2)		38.8 (0.4)		24.9 (0.3)
Unknown	9.3 (0.3)		25.6 (0.5)		19.7 (0.4)
Subjective academic achievement		0.00*		0.00*		0.00*
Low	14.4 (0.4)		28.9 (0.5)		20.6 (0.5)
Middle-low	11.3 (0.2)		31.5 (0.4)		22.9 (0.3)
Middle	9.9 (0.2)		33.4 (0.4)		22.5 (0.3)
High-middle	10.8 (0.3)		37.3 (0.4)		24.5 (0.3)
High	10.5 (0.4)		38.5 (0.6)		24.5 (0.5)
Obesity		0.02*		0.51		0.22
(−)	10.9 (0.1)		34.0 (0.3)		23.1 (0.2)
(+)	11.8 (0.4)		34.5 (0.7)		23.8 (0.5)
Drinking		0.00*		0.53		0.22
(−)	9.8 (0.1)		33.9 (0.3)		23.2 (0.2)
(+)	16.0 (0.3)		33.6 (0.5)		22.7 (0.4)
Smoking		0.00*		0.01*		0.00*
(−)	9.9 (0.1)		34.1 (0.3)		23.4 (0.2)
(+)	19.7 (0.5)		32.4 (0.6)		20.7 (0.4)

^aFamily Affluence Scale

*p < 0.05