Table 2.

Univariate logistic regression analysis correlating myopia with leisure time activities and the socioeconomic status

Univariate logistic regression analysis	Odds ratio	95% confidence interval for Odds ratios		p-value
Socioeconomic status:	0.93	0.89	0.97	< 0.01
Time outdoors duration:
< 1 h	Reference
1–2 h	0.90	0.53	1.53	0.70
3–4 h	0.71	0.39	1.29	0.25
> 4 h	0.73	0.32	1.68	0.46
Time outdoors frequency:
Every day	Reference
Every two days	1.92	1.22	3.05	0.01
Two days per week	2.55	1.60	4.06	< 0.01
Once per week	4.08	2.09	7.95	< 0.01
Near work duration:
< 1 h	Reference
1–2 h	2.08	1.39	3.12	< 0.01
3–4 h	4.48	1.97	10.21	< 0.01
> 4 h	7.63	1.25	46.77	0.03
Near work frequency:
Every day	Reference
Every two days	1.37	0.84	2.24	0.20
Two days per week	1.45	0.82	2.56	0.20
Once per week	2.63	1.52	4.56	< 0.01