Table 4.

Multivariate regression results for the differences on the risk for REs by region of habitation.

		Myopia		Hyperopia		Astigmatism		Anisometropia
		OR (95%CI)	P	OR (95%CI)	P	OR (95%CI)	P	OR(95%CI)	P
Model 1	Rural	1		1		1		1
	Urban	1.88 (1.62, 2.18)	<0.001	0.53 (0.43, 0.65)	<0.001	1.07 (0.94, 1.21)	0.300	1.37 (1.07, 1.76)	0.013
Model 2	Rural	1		1		1		1
	Urban	1.80 (1.53, 2.11)	<0.001	0.54 (0.43, 0.67)	<0.001	0.96 (0.84, 1.10)	0.559	1.29 (1.00, 1.67)	0.049

Model 1: adjusted with age and gender.

Model 2: adjusted with age, gender and any the variables analyzed significantly in the bivariate analysis.

OR, odds ratio; CI, Confidence Interval.