Table 4

Results of logistic regression analysis showing factors associated with myopia in the better eye

Reference variables	Categories	Univariate logistic regression			Multivariate logistic regression
Reference variables	Categories	OR	95% CI	P value	OR	95% CI	P value
Gender (boys)	Girls	1.17	1.16 to 1.19	<0.001	1.23	1.21 to 1.25	<0.001
Age 5–9 years	10–14	2.03	1.98 to 2.07	<0.001	2.16	2.11 to 2.21	<0.001
Age 5–9 years	15–18	3.16	3.09 to 3.24	<0.001	3.03	2.96 to 3.11	<0.001
Government-funded school	Private school	2.44	2.39 to 2.48	<0.001	2.21	2.17 to 2.26	<0.001
Kerala state (adult literacy* (%): overall 94.0, female 92.1, male 96.1)	Madhya Pradesh (adult literacy* (%): overall 69.3, female 59.2, male 78.7)	0.54	0.53 to 0.56	<0.001	0.67	0.65 to 0.69	<0.001
	Maharashtra (adult literacy* (%): overall 82.3, female 75.9, male 89.5)	0.59	0.57 to 0.61	<0.001	0.69	0.66 to 0.71	<0.001
	Tamil Nadu (adult literacy* (%): overall 80.1, female 73.4, male 86.8)	1.24	1.21 to 1.26	<0.001	1.58	1.54 to 1.62	<0.001
	West Bengal (adult literacy* (%): overall 76.3, female 70.5, male 81.7)	0.26	0.25 to 0.27	<0.001	0.48	0.46 to 0.50	<0.001
Location (rural)	Semirural	1.06	1.03 to 1.08	<0.001	0.97	0.94 to 0.99	=0.015
	Semiurban	2.01	1.96 to 2.05	<0.001	1.37	1.34 to 1.41	<0.001
	Urban	4.28	3.85 to 4.77	<0.001	2.51	2.25 to 2.79	<0.001