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Table 4 The association between physical activity time and CDI value* among urban junior high-school students in Nanjing, China, using linear regression models

From: Physical activity inversely associated with the presence of depression among urban adolescents in regional China

  

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

  1. *Time spent in physical activity and CDI were both considered as continuous variables, with CDI as the dependent variable.
  2. B: unstandardized coefficient; SE: standard error.
  3. # Model 1: regression coefficient calculated via univariate linear regression model.
  4. § 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.
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BMC Public Health

ISSN: 1471-2458

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