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Table 1 Selected characteristics of participants in this study

From: Association of academic performance, general health with health-related quality of life in primary and high school students in China

 

Overall (N = 4388)

School type

p valuea

Primary school (n = 1602)

Junior high school (n = 1455)

Senior high school (n = 1331)

Age

 Mean (SDb)

13.9 (2.5)

11.2 (0.9)

14.1 (0.9)

16.9 (0.9)

 

Gender (%)

 Boys

50.2

53.9

50.9

45.1

< 0.001

 Girls

49.8

46.1

49.1

54.9

Residence (%)

 Rural

46.3

44.5

46.5

48.1

0.192

 Suburban

22.7

24.5

22.2

21.1

 Urban

31.0

31.0

31.3

30.8

Self-rated academic performance (%)c

 Poor

20.6

16.5

25.1

20.7

 

 Fair

34.6

30.9

32.1

41.7

< 0.001

 Good

44.8

52.6

42.8

37.6

 

Self-assessed general health statusd

 Poor

3.9

2.7

3.5

5.6

 

 Fair

35.7

25.7

36.0

47.3

< 0.001

 Good

60.5

71.5

60.5

47.1

 

Body weight status (%)

 Non-overweight

72.3

67.8

73.4

76.6

 

 Overweight

16.7

17.8

16.9

15.2

< 0.001

 Obesity

11.0

14.4

9.7

8.2

 

Physical activity (%)e

 Sufficient

20.0

23.0

19.0

17.5

< 0.001

 Insufficient

80.0

77.0

81.0

82.5

Screen time (%)

 < 2 h/day

96.3

96.8

95.3

96.7

0.060

 ≥ 2 h/day

3.7

3.2

4.7

3.3

Parental educational attainment

 < 9 years

38.9

47.2

26.7

42.4

 

 10–13 years

32.2

27.0

37.9

32.3

< 0.001

 ≥ 13 years

28.8

25.8

35.4

25.2

 
  1. aChi-square test
  2. bSD: standard deviation
  3. cGood- excellent or good; Fair-not good and not poor; Poor- poor or very poor
  4. dGood- very good or good; Fair- not good or not bad; Poor-poor or very poor
  5. eSufficient physical activity refers to at least 60 min/day moderate-vigorous intensity physical activity plus ≥ 3 days/week muscle/bone-strengthening; while insufficient physical activity means less than 60 min/day moderate-vigorous intensity physical activity or having no ≥ 3 days/week muscle/bone-strengthening