| |
Gender
|
School Grade
|
---|
|
Total
|
Girls
|
Boys
|
7
|
8
|
9
|
---|
Model 1
#
| | | | | | |
B
|
-0.033
|
-0.051
|
-0.029
|
-0.015
|
-0.027
|
-0.057
|
SE
|
0.005
|
0.010
|
0.006
|
0.009
|
0.013
|
0.021
|
R2
|
0.005
|
0.007
|
0.006
|
0.002
|
0.002
|
0.009
|
p-value
|
0.000
|
0.000
|
0.000
|
0.101
|
0.045
|
0.005
|
DF
|
1
|
1
|
1
|
1
|
1
|
1
|
Model 2
§
| | | | | | |
B
|
-0.030
|
-0.046
|
-0.024
|
-0.011
|
-0.024
|
-0.050
|
SE
|
0.005
|
0.015
|
0.006
|
0.008
|
0.012
|
0.010
|
R2
|
0.011
|
0.013
|
0.008
|
0.006
|
0.009
|
0.012
|
p-value
|
0.000
|
0.002
|
0.000
|
0.186
|
0.040
|
0.000
|
DF
|
15
|
14
|
14
|
14
|
14
|
14
|
- *Time spent in physical activity and CDI were both considered as continuous variables, with CDI as the dependent variable.
- B: unstandardized coefficient; SE: standard error.
-
# Model 1: regression coefficient calculated via univariate linear regression model.
-
§ Model 2: regression coefficient calculated via multivariate linear regression model with adjustment for age, gender, school grade, BMI, TV time, study time, sleep time, smoking behavior, alcohol consumption, unintentional injuries, parents' educational attainments, parents' job statuses, and family structure.