Table 3.

Multiple logistic regression analysis correlating myopia with leisure time activities and SES, adjusted for age, sex and SES

Multiple logistic regression analysis	Odds ratio	95% confidence interval for Odds ratios		p-value
Socioeconomic status:	0.95	0.91	1.00	0.06
Time outdoors duration:
< 1 h	Reference
1–2 h	1.03	0.57	1.87	0.91
3–4 h	1.02	0.52	2.00	0.94
> 4 h	1.25	0.48	3.25	0.65
Time outdoors frequency:
Every day	Reference
Every two days	1.34	0.81	2.23	0.25
Two days per week	1.33	0.78	2.24	0.29
Once per week	3.05	1.49	6.25	0.01
Near work duration:
< 1 h	Reference
1–2 h	1.78	1.13	2.80	0.01
3–4 h	3.86	1.56	9.54	0.01
> 4 h	3.15	0.44	22.55	0.25
Near work frequency:
Every day	Reference
Every two days	0.95	0.55	1.65	0.85
Two days per week	1.06	0.58	1.95	0.84
Once per week	1.18	0.62	2.24	0.61