Table 3 Risk of bias (RoB) ratings for included studies

Eyre et al. (2016) [23], Yang et al. (2016) [24], & Eyre et al. (2017) [22]

1

1

1

1

0

1

1

0

1

0

1

8/11

Karydaki et al. (2017) [25]

0

0

0

1

0

1

0

0

1

0

0

3/11

Innes et al. (2012) [26]

1

N/A

N/A

1

1

1

0

0

1

0

1

6/9

Innes et al. (2016) [27]

1

1

1

1

1

1

0

0

1

0

1

8/11

Newberg et al. (2010) [28]

0

0

0

1

0

1

1

0

1

0

1

5/11

Fan et al. (2011) [29]

1

0

0

1

0

1

1

0

1

0

0

5/11

Litchke et al. (2012) [30] & Litchke et al. (2014) [31]

0

N/A

N/A

1

0

1

N/A

0

1

0

0

3/8

McCaffrey et al. (2014) [32]

0

N/A

N/A

1

1

1

N/A

0

1

0

1

5/8

Park et al. (2019) [33] & Park et al. (2020) [34]

1

1

0

0

1

1

1

0

1

0

1

7/11

Rodríguez Salazar et al. (2017) [35]

1

N/A

N/A

0

0

1

N/A

0

1

0

0

3/8