Table 3. Multivariate logistic regression models of potential risk factors for allergic rhinitis between the rural and urban areas.

	OR	OR (adjusted)	95% CI (adjusted)	P value (adjusted)
Area
Urban (n=1,499)	-	-	-	-
Rural (n=803)	1.505	1.439	0.974-2.125	0.068
Gender
Male (n=1,093)	-	-	-	-
Female (n=1,209)	0.923	0.926	0.721-1.189	0.546
Age
18-27 (n=459)	-	-	-	-
28-37 (n=460)	0.875	0.900	0.604-1.342	0.606
38-47 (n=575)	0.839	0.846	0.575-1.244	0.394
48-57 (n=576)	0.895	1.170	0.788-1.736	0.437
58-65 (n=232)	1.002	1.282	0.778-2.112	0.330
Educational level
Illiteracy (n=364)	-	-	-	-
Elementary school (n=701)	1.557	2.198	1.072-2.236	0.02
Middle school (n=640)	1.417	1.879	0.966-2.078	0.074
University (n=292)	1.352	1.556	0.86-2.124	0.191
Post-graduate (n=240)	1.367	1.453	0.852-2.195	0.195
Yearly income
Minimum (n=570)	-	-	-	-
Low (n=376)	0.608	0.551	0.377-0.805	<0.01
Below-moderate (n=328)	0.589	0.495	0.306-0.799	<0.01
Moderate (n=616)	0.851	0.615	0.328-1.154	0.13
Above-moderate (n=196)	0.598	0.489	0.275-0.868	0.015
High (n=140)	0.661	0.531	0.28-1.005	0.052
Maximum (n=0)	-	-	-	-

Not all 803 rural subjects and 1,499 urban subjects are included in this analysis due to missing data.