Table 3. Multivariate logistic regression analysis of refractive anisometropia among myopic participants (n = 8,153).

Characteristics	Crude OR	P value	95% CI	Adjusted OR	P value	95% CI
Baseline SE
SE ≤ -6.0D	23.54	<0.001	14.32–38.68	14.67	<0.001	8.67–24.82
-6.0D < SE ≤ -3.0D	2.62	<0.001	2.09–3.29	1.97	<0.001	1.55–2.51
-3.0D < SE ≤ -0.5D	1.00			1.00
Astigmatism (diopter)	1.005	<0.001	1.004–1.005	1.004	<0.001	1.003–1.005
Amblyopia
Yes	2.62	<0.001	2.00–3.45	1.43	0.024	1.05–1.95
No	1.00			1.00
Gender
Male	0.85	0.048	0.73–0.99	0.86	0.079	0.73–1.02
Female	1.00			1.00
Area of residence
Urban	1.04	0.623	0.89–1.22	1.05	0.553	0.89–1.24
Suburban	1.00			1.00
Maternal education level
Junior high school or less	1.00			1.00
Senior high school	0.53	<0.001	0.37–0.75	0.54	0.002	0.37–0.80
College or more	0.55	0.001	0.39–0.78	0.63	0.024	0.42–0.94
Parental myopia
None of both	1.00			1.00
Either myopic	0.74	0.087	0.52–1.05	0.86	0.420	0.59–1.25
Both myopic	0.80	0.177	0.58–1.11	0.85	0.396	0.59–1.23
Age when starting near work
<6 years	0.99	0.945	0.75–1.31	1.00	0.978	0.75–1.34
≥6 years	1.00			1.00
Time spent on near work
<2 hours per day	1.00			1.00
≥2 hours per day	1.01	0.878	0.86–1.19	1.02	0.813	0.86–1.21
Distance from near work
≥30 centimeters	1.00			1.00
<30 centimeters	1.12	0.177	0.95–1.33	1.03	0.774	0.86–1.23
10-minute rest period after 30 minutes of near work
Yes	1.00			1.00
No	0.96	0.670	0.81–1.15	0.93	0.436	0.77–1.12
Use of cellphones, computers, or computer tablets in the past year
Yes	0.87	0.255	0.68–1.11	0.90	0.403	0.70–1.16
No	1.00			1.00
Attending an after-school tutorial program
Yes	0.90	0.254	0.75–1.08	0.88	0.186	0.73–1.06
No	1.00			1.00

OR, odds ratio; CI, confidence interval; SE, spherical equivalent.