Sample size | Total(°) | Left(°) | Right(°) | t valuea | P valuea | |
---|---|---|---|---|---|---|
Current study | 15 | 39.47 ± 1.76 | 39.60 ± 1.99 | 39.33 ± 2.02 | − | − |
Yamada etc. [19] | 40 | − | 37.90 ± 7.00 | 37.70 ± 7.50 | left: − 0.092;right: − 0.83 | left: 0.361;right: 0.412 |
Zhu etc. [20] | 30 | − | 36.49 ± 3.14 | 37.16 ± 3.14 | left: − 3.49;right: − 2.43 | left: 0.001;right: 0.019 |
Yuan etc. [21] | 25 | 36.11 ± 3.38 | − | − | – 3.56 | 0.001 |
Wang etc. [22] | 30 | 40.25 ± 2.84 | − | − | 0.99 | 0.326 |