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