Table 2.

Association between myopia and serum vitamin A

	Myopia			High Myopia
	aOR	95% CI	P-value	aOR	95% CI	P-value
Age	1.01	0.98–1.04	0.53	1.02	0.94–1.10	0.65
Gender (Female vs. male)	1.18	1.02–1.36	0.027	1.71	1.25–2.33	0.001
Education attainment (per each category increment)	1.13	1.04–1.23	0.004	1.34	1.09–1.65	0.006
TV and computer usage > 2 h/day	1.07	0.91–1.26	0.42	1.07	0.72–1.58	0.73
MET scores (per 1 quarter increment)	0.9	0.82–0.98	0.015	0.85	0.70–1.04	0.12
Vitamin A (per 1 µmol/L increment)	1.01	0.83–1.24	0.88	1.46	1.01–2.10	0.045
Vitamin D (per 10 nmol/L increment)	0.96	0.91–1.02	0.16	0.90	0.83–0.98	0.012

Data were weighted estimates. aOR, adjusted odds ratio; 95% CI, 95% confidence interval. Multivariable logistic regression included all variables in the table