Study | Mean Difference | Lower CI | Upper CI | p | I 2 |
---|---|---|---|---|---|
Omitting Yee et al. (2014) | 3.27 | 1.60 | 4.95 | .07 | 70 |
Omitting Kalyvianakis and Hatzichristou (2017) | 5.84 | 3.71 | 7.97 | <.00001 | 0 |
Omitting Kitrey et al. (2016) | 3.36 | 1.53 | 5.19 | .0003 | 81 |
Note. CI = confidence interval.