Study excluded | Remaining samples (KA/MA) | Overall effect | Heterogeneity | |||
---|---|---|---|---|---|---|
MD | 95% CI | p value | I2 (%) | p value | ||
Calliess [33] | 211/213 | − 5.37 | − 12.43 to 1.69 | 0.14 | 78 | 0.001 |
Dossett [19] | 270/272 | − 5.05 | − 12.06 to 1.95 | 0.16 | 83 |  < 0.0001 |
Dossett [20] | 267/269 | − 6.11 | − 13.47 to 1.25 | 0.10 | 86 |  < 0.00001 |
Yeo [26] | 281/283 | − 7.83 | − 14.89 to − 0.76 | 0.03 | 85 |  < 0.0001 |
Young [24] | 262/263 | − 7.76 | − 15.21 to − 0.31 | 0.04 | 84 |  < 0.0001 |
Young [25] | 264/265 | − 9.06 | − 14.69 to − 3.42 | 0.002 | 72 | 0.007 |