Follow-up (months) | Test for heterogeneity | Analysis model | Test for overall effect | WMD or SMD | 95% CI | ||
---|---|---|---|---|---|---|---|
I2 (%) | P | Z | P | ||||
3 | 0 | 0.94 | Fixed | 3.4 | 0.0007 | −0.89 | (−1.40, −0.38) |
6 | 0 | 0.56 | Fixed | 5.46 | <0.00001 | −1.22 | (−1.66, −0.78) |
12 | 0 | 0.53 | Fixed | 3.96 | <0.0001 | −1.07 | (−1.60, −0.54) |