Table 3.
Sample size calculation for primary and secondary outcomes based on effect size of previously interventions.
| Outucome | Author, year | Δ IG |
ΔCG |
Effect size | Power (%) | SL (%) | Sample size |
Drop-out (30%) |
||
|---|---|---|---|---|---|---|---|---|---|---|
| IG |
CG |
IG |
CG |
|||||||
| Mean(SD) | Mean(SD) | n | n | n | n | |||||
| PA (cpm) | Meyer, 2014 [55] | −185(191) | −227(182.5) | 0.4 | 80 | 5 | 102 | 102 | 133 | 133 |
| MVPA | Lindqvist, 2014 [56] | 4.9(28.9) | −25.4(23.0) | 1.2 | 80 | 5 | 14 | 14 | 18 | 18 |
| Body fat mass | Weeks, 2008 [57] | −699(2061) | −69(1408) | −0.4 | 80 | 5 | 100 | 100 | 130 | 130 |
| Sleep duration | Kredlow, 2015 [58] | – | – | 0.4 | 80 | 5 | 102 | 102 | 133 | 133 |
IG, intervention group; CG, control group; SL, significance level; SD, standard deviation; MVPA, moderate-to-vigorous physical activity; PA, physical activity; BMI, body mass index.