Table 2.

Adjusted logistic regression analysis of allergic diseases among Korean adolescents (n = 75,643)

Variable	Asthma		Allergic rhinitis		Atopic dermatitis
	Adjusted OR	95 % CI	Adjusted OR	95 % CI	Adjusted OR	95 % CI
Sex (Boy)
Girl	1.18*	1.13, 1.25	0.95*	0.91, 0.99	1.39*	1.34, 1.45
Residence (Districts)
Small and Medium cities	0.94	0.85, 1.03	1.43*	1.32, 1.56	1.10*	1.02, 1.19
Large cities	0.94	0.86, 1.03	1.30*	1.20, 1.41	1.10*	1.02, 1.19
Family affluence scale (Low)
Middle	1.05	0.99, 1.12	1.11*	1. 06, 1.16	1.04	0.99, 1.09
High	1.08	0.99, 1.16	1.25*	1.19, 1.31	1.07*	1.01, 1.12
Paternal education (Middle or less)
High school	0.93	0.83, 1.04	1.06	0.97, 1.15	1.05	0.95, 1.16
Bachelor or higher	1.01	0.89, 1.14	1.22*	1.11, 1.34	1.09	0.99, 1.21
unknown	0.85	0.73, 0.99	0.96	0.86, 1.07	0.97	0.85, 1.10
Maternal education (Middle or less)
High school	1.01	0.89, 1.16	1.06	0.97, 1.17	1.10	0.99, 1.22
Bachelor or higher	1.04	0.91, 1.19	1.18*	1.07, 1.30	1.16*	1.04, 1.29
unknown	0.90	0.76, 1.07	0.84*	0.75, 0.95	1.01	0.89, 1.14
Subjective academic achievement (Low)
Middle-low	0.83*	0.77, 0.90	1.05	0.98, 1.11	1.09*	1.01, 1.17
Middle	0.74*	0.68, 0.81	1.10*	1.03, 1.17	1.04	0.97, 1.11
High-middle	0.84*	0.77, 0.92	1.26*	1.19, 1.34	1.15*	1.07, 1.24
High	0.81*	0.73, 0.89	1.29*	1.20, 1.39	1.18*	1.09, 1.29
Obesity (−)
(+)	1.13*	1.04, 1.22	1.04	0.98, 1.11	1.13*	1.06, 1.20
Drinking (−)
(+)	1.38*	1.30, 1.47	1.03	0.98, 1.07	1.05	1.00, 1.11
Smoking (−)
(+)	1.89*	1.76, 2.04	1.01	0.95, 1.07	0.96	0.90, 1.02

Adjusted by sex, residence, paternal and maternal education levels, Family Affluence Scale, subjective academic achievement, obesity, drinking and smoking

*p < 0.05