Table 4 Risk of Bias among individual studies
| Â | Random sequence generation (selection bias) | Allocation concealment (selection bias) | Blinding participants & personnel (performance bias) | Blinding of outcome assessment (detection bias) | Incomplete outcome data (attrition bias) | Selective reporting (reporting bias) |
|---|---|---|---|---|---|---|
Bakirci-Taylor (2019) [23] | – | – |  +  |  +  | – | – |
Baranowski et (2011) [47] |  +  | ? |  +  | – | – | – |
Nollen (2014) [46] |  +  |  +  |  +  |  +  | – | ? |
Thompson (2015) [48] | – | ? |  +  | – | – | – |
Wengreen (2021) [49] | – | ? |  +  | – | ? | – |