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Table 1 Prevalence of depression and anxiety at two wave surveys by demographics (N = 28,398)

From: Has the “Double Reduction” policy relieved stress? A follow-up study on Chinese adolescents

Characteristics

N

Depression (%)

Anxiety (%)

T1

T2

T1

T2

Sex

 Boy

14,981

7.1

6.5

5.3

4.7

 Girl

13,417

13.0

12.5

9.8

9.8

 χ2

 

275.44***

301.85***

212.52***

275.70***

Grade [age, years]

 Grade 5 [11.14(0.62)]

10,545

6.7

5.6

5.1

4.2

 Grade 6 [12.08(0.59)]

5991

8.7

8.1

5.9

5.7

 Grade 7 [13.02(0.60)]

7031

11.8

12.7

8.9

9.9

 Grade 8 [13.95(0.62)]

4832

15.5

14.2

12.3

11.1

 χ2

 

333.64***

406.88***

289.72***

348.35***

School types

 Public school

13,934

9.5

8.9

7.0

6.8

 Private school

14,464

10.3

9.8

7.9

7.5

 χ2

 

5.83*

6.87**

7.67**

5.84*

Boarding at school

 Yes

2317

11.3

10.4

7.9

7.8

 No

26,081

9.8

9.3

7.4

7.1

 χ2

 

5.34*

3.25

0.82

1.84

Ethnicity

 Han

27,055

9.9

9.4

7.4

7.1

 Others

1343

9.8

9.2

7.4

6.6

 χ2

 

0.01

0.03

0.01

0.68

Only-children family

 Yes

5638

8.8

8.5

7.2

6.3

 No

22,760

10.2

9.6

7.5

7.3

 χ2

 

9.45**

6.65**

0.70

7.47**

Parental marital status

 Good

27,047

9.6

9.1

7.2

6.9

 Poor

1351

16.4

14.4

11.6

11.3

 χ2

 

66.55***

41.88***

36.30***

38.00***

Family income (monthly)

  < ¥12,000

12,506

9.7

9.2

7.1

6.9

 ¥12,000–¥30,000

7423

8.9

8.9

6.8

7.0

  > ¥30,000

2342

8.7

8.8

6.5

6.4

 Unknown

6127

12.0

10.5

9.2

7.9

 χ2

 

43.17***

13.11**

38.10***

8.06*

Father’s education

 Junior high school or less

8556

10.7

9.6

7.8

7.4

 Senior high school

8459

9.2

9.4

7.2

6.7

 College or more

11,383

9.8

9.2

7.3

7.2

 χ2

 

11.45**

1.19

2.15

3.17

Mother’s education

 Junior high school or less

10,236

10.5

9.4

7.7

7.2

 Senior high school

7905

9.3

9.7

7.4

7.3

 College or more

10,257

9.7

9.0

7.2

6.9

 χ2

 

6.80*

2.66

2.14

1.19

Chronic physical illness

 Yes

984

15.1

14.3

14.3

11.7

 No

27,414

9.1

7.2

7.2

7.0

 χ2

 

64.10***

40.24***

70.64***

32.21***

Family history of mental disorders

 Yes

267

24.0

20.2

21.0

12.4

 No

28,131

9.8

9.3

7.3

7.1

 χ2

 

59.94***

37.54

71.95

11.21**

  1. All demographics variables were measured at Time 1
  2. *p < 0.05, **p < 0.01, **p < 0.001