Table 2.
Intervention effects on adolescents’ sitting time, prolonged sitting bouts (>15 min), standing and stepping times, and breaks from sitting during lessonsa at T1 and T2.
| Group differences b |
||||||
|---|---|---|---|---|---|---|
| T1 |
T2 |
|||||
| Mean (95%CI) | β | p | Mean (95%CI) | β | p | |
| Sitting (min/lesson) | –9.7 (–15.0 to –4.4) | –0.4 | 0.001 | –6.7 (–11.0 to –2.5) | –0.3 | 0.001 |
| Sitting bouts >15 min (min/lesson) | –7.7 (–17.5 to 2.0) | –0.2 | 0.141 | –11.2 (–18.0 to –4.5) | –0.3 | 0.002 |
| Standing (min/lesson) | 7.3 (2.5 to 12.2) | 0.3 | 0.003 | 5.8 (2.0 to 9.5) | 0.3 | 0.002 |
| Stepping (min/lesson) | 2.5 (0.7 to 4.3) | 0.3 | 0.010 | 1.2 (–1.1 to 3.4) | 0.1 | 0.252 |
| Breaks from sitting (n/lesson) | 1.3 (0.3 to 2.4) | 0.3 | 0.009 | 1.8 (0.5 to 3.0) | 0.3 | 0.004 |
Notes: T1 = 4 weeks post-baseline; T2 = 17 weeks post-baseline.
a
Each lesson equals to 57 min. Data obtained from activPAL3C monitors.
b
Results from intention to treat linear mixed models comparing intervention and comparison groups (coefficients (b), 95%CI, p value, standardized beta weights (β)), adjusting for baseline levels of outcomes, age, and sex.
Abbreviation: 95%CI = 95% confidence interval.