Table 2. Parameters Associated with the Elongation of Axial Length within One Year in Students of Grade 1 and 4 in Greater Beijing (Univariate Analysis).

Parameter	P-Value	Regression Coefficient BOr Mean Difference	Standardized CoefficientBeta	95% Conf. Interval of B or Mean Difference
Age (Years)	0.052	−0.03	−0.08	−0.05, 0.00
Gender	0.19	−0.05		−0.13, 0.03
Rural/Urban Region	<0.001	−0.19		−0.27, −0.11
Body Weight (kg)	0.85	0.000	−0.009	−0.005, 0.004
Body Height (cm)	0.99			−0.004, 0.004
Body Mass Index (kg/m2)	0.67	0.002	0.02	−0.006, 0.01
Parental Parameters
Level of Education, Father	0.001	0.12	0.16	0.06, 0.18
Level of Education, Mother	0.001	0.10	0.14	0.04, 0.16
Occupation (Physical/Mental),
of the Father	0.001	0.15		0.06, 0.24
of the Mother	0.006	0.14		0.04, 0.24
Father Myopic	0.007	0.14		0.04, 0.24
Mother Myopia	<0.001	0.18		0.08, 0.27
Behavior
Outdoors Time with Sports	0.57	−0.10	−0.03	−0.45,0.25
Outdoors Time with Leisure	0.007	−0.09	−0.13	−0.15, −0.03
Outdoors Activity Total	0.01	−0.09	−0.13	−0.15, −0.02
Time Watching Television	0.03	−0.05	−0.10	−0.10, −0.004
Time Spent with Studying	0.005	0.07	0.13	0.02, 0.12
Time with Electronic Gadgets	0.81	0.02	0.01	−0.14,0.18