Table 2 –
Cohrane Quality Assessment Tool
| Last Name of First Author | Selection Bias | Allocation Concealment | Performance Bias | Detection Bias | Attrition Bias | Reporting Bias | Other Bias | |
|---|---|---|---|---|---|---|---|---|
| Random Sequence Generation | Blinding of Participants and Personnel | Blinding of Outcome Assessment | Incomplete uutcome Data | Selective Reporting | ||||
| Randomization present: Was method disclosed? (yes = Y, no = N) | ||||||||
| Babic | Y | + | + | + | + | + | + | First eight schools to accept invitation and 40 students to return signed consent letters were included; few parents completed evaluation; unclear to what extent parents implemented the strategies; no fidelity checks reported |
| Beaulieu | N | ? | ? | ? | ? | + | + | Not all participants received same components of intervention (e.g., at least 30% of parents did not get electronic messages, only 11% of teens did cooking session); process evaluation findings not reported, no fidelity hecks reported |
| Cook | N | ? | ? | ? | ? | ? | + | Assessment of mediators did not precede outcome, was performed concurrently; no objective measure for PA—only self-report instruments; no fidelity checks reported |
| Dewar/McCabe | N | ? | ? | ? | ? | ? | + | Intervention fidelity 74.0%, IG attended on average <l/2 of the PA sessions (42.5%), & did 9.0% of home PA and nutrition challenges, poor participant compliance with accelerometry. No fidelity checks reported |
| Di Noia | N | ? | ? | ? | ? | ? | + | Self-report, self-selected sample; no fidelity checks reported |
| Gray | N | ? | ? | ? | ? | + | + | Self-report measures; no fidelity checks reported |
| Lubans | Y | + | + | − | − | ? | + | No fidelity checks reported; teachers selected students |
| Luszczynska | Y | + | + | + | + | + | + | No intention-to-treat analysis |
| Roesch | N | ? | ? | − | ? | + | + | No fidelity checks reported |
| Smith | Y | + | + | ? | ? | + | + | Screen time was self-reported, 36% of boys provided complete data for MVPA (no imputation was performed on variable), no fidelity checks reported |
| Van Lippevelde | N | ? | ? | ? | ? | + | + | Lack of process evaluation data on implementation and levels of parental involvement; self-report measures, no fidelity checks reported |
| Werch | Y | + | ? | ? | ? | + | + | No fidelity checks reported |
Note. IG, intervention group; MVPA, moderate to vigorous physical activity; PA, physical activity.
+ = low risk of bias; − = high risk of bias; ? = unsure risk of bias.