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Table 2 Change in sedentary/screen behaviour from T1: Primary school to T2: Secondary school

From: Changing from primary to secondary school highlights opportunities for school environment interventions aiming to increase physical activity and reduce sedentary behaviour: a longitudinal cohort study

 

Total

No change

T1 to T2 Increase

T1 to T2 Decrease

 

Categorical variable

N

N

%

N

%

N

%

p †

Average daily (self-report) leisure screen time (1: ≤ 2 hrs; 2: > 2 hrs)

239

160

67%

47

20%

32

13%

 

Usually watch TV/videos (0: No, 1: Yes)

241

194

80%

16

7%

31

13%

*

Usually play non-active computer games (0: No, 1: Yes)

242

173

71%

27

11%

42

17%

 

Usually use computer for leisure (0: No, 1: Yes)

243

168

69%

49

20%

26

11%

*

Usually use computer for homework (0: No, 1: Yes)

243

154

63%

64

26%

25

10%

*

  

T1: Primary school

T2: Secondary school

T1 to T2 Difference

Continuous variable

N

Mean (SD)

95% CI

Mean (SD)

95% CI

Mean (SD)

95% CI

p #

Average daily (mins) sedentary (accelerometer)

127

476 (69)

464, 488

492 (86)

477, 507

16 (76)

2, 29

*

Average daily (mins) weekday leisure screen time (self-report)1

240

135 (111)

120, 149

152 (114)

137, 166

17 (126)

1, 33

*

Average daily (mins) weekend leisure screen time (self-report)1

239

143 (121)

127, 158

158 (160)

138, 179

16 (164)

−5, 37

 

Average daily (mins) weekday homework screen time (self-report)

241

36 (49)

30, 42

61 (64)

53, 69

25 (67)

16, 33

*

Average daily (mins) weekend homework screen time (self-report)

239

19 (32)

15, 24

31 (45)

26, 37

12 (48)

6, 18

*

  1. CI: confidence interval; SD: standard deviation; * statistical significance at P < 0.05 level.
  2. p †, test value for change between T1 & T2 total using exact McNemar or Bowker paired test of proportions.
  3. p #, test value for difference between T1 & T2 total using paired t-test of means.
  4. 1. Daily screen time capped at maximum 8 hours per day as per CLASS guidelines.