Association of Myopia in Elementary School Students in Jiaojiang District, Taizhou City, China

Table 3

The associations between factors and myopia using multivariate logistic regression.

Parameters	All (n = 556)		School A (n = 310)		School B (n = 246)
	OR (95% CI)	value	OR (95% CI)	value	OR (95% CI)	value
Age	1.57 (0.87, 2.80)	0.131	1.47 (0.55, 3.92)	0.437	1.75 (0.82, 3.75)	0.149
Grade
4	0.94 (0.26, 3.37)	0.919	1.20 (0.15, 9.91)	0.866	0.97 (0.16, 6.08)	0.976
5	1.03 (0.48, 2.21)	0.936	0.88 (0.27, 2.91)	0.837	1.28 (0.39, 4.16)	0.686
6	Reference		Reference		Reference
Gender
Male	0.98 (0.68, 1.42)	0.914	0.87 (0.53, 1.44)	0.596	1.08 (0.60, 1.95)	0.795
Female	Reference		Reference		Reference
Change class seats
Never	—	—	—	—	—
Once a semester	1.09 (0.25, 4.82)	0.907	0.83 (0.09, 7.82)	0.867	1.07 (0.13, 8.73)	0.950
Once a month	1.08 (0.52, 2.26)	0.829	1.17 (0.38, 3.64)	0.781	0.58 (0.12, 2.75)	0.497
Once a fortnight	1.10 (0.61, 2.01)	0.748	1.23 (0.43, 3.52)	0.694	1.15 (0.50, 2.64)	0.749
Once a week	Reference		Reference		Reference
Adjust the height of desks and chairs
Never	Reference		Reference		Reference
Once a year	0.37 (0.21, 0.67)	0.001	1.07 (0.36, 3.13)	0.908	0.26 (0.11, 0.62)	0.003
Once a semester	0.60 (0.35, 0.97)	0.037	0.74 (0.34, 1.60)	0.450	0.55 (0.22, 1.34)	0.188
Once every 2 to 3 months	0.76 (0.37, 1.56)	0.452	0.98 (0.38, 2.52)	0.973	0.82 (0.13, 5.13)	0.827
Sleeping time more than 8 h
Yes	Reference		Reference		Reference
No	0.45 (0.17, 1.18)	0.103	0.29 (0.08, 1.03)	0.055	1.15 (0.21, 6.18)	0.870
Father or mother has myopia
Yes	Reference		Reference		Reference
No	0.51 (0.35, 0.74)	<0.001	0.56 (0.34, 0.93)	0.026	0.45 (0.25, 0.83)	0.009