Summary of postoperative indices
| Intraoperative indices | Studies (n) | Sample size | RR (CI) | WMD (CI) | I2 (%) | P of χ2 | Selected model | P for overall effect | |
| Anti-VEGF group | No anti-VEGF group | ||||||||
| General incidence of recurrent VH | 7 | 134 | 128 | 0.389 (0.255 to 0.594) | NA | 19.70 | 0.274 | Fixed-effect | 0.001 |
| Incidence of early recurrent VH (<4 weeks) | 4 | 120 | 117 | 0.421 (0.262 to 0.678) | NA | 5.7 | 0.365 | Fixed-effect | 0.001 |
| Incidence of early recurrent VH (>4 weeks) | 4 | 120 | 117 | 0.657 (0.315 to 1.372) | NA | 0 | 0.697 | Fixed-effect | 0.264 |
| Vitreous clear-up time of recurrent | 2 | 90 | 87 | NA | –5.829 (–7.079 to –4.579) | 0 | 0.400 | Fixed-effect | 0.001 |
| The rate of recurrent RD | 8 | 145 | 139 | 0.502 (0.200 to 1.260) | NA | 0 | 0.873 | Fixed-effect | 0.142 |
| Required secondary surgery for recurrent RD | 5 | 126 | 120 | 0.598 (0.245 to 1.495) | NA | 0 | 0.978 | Fixed-effect | 0.259 |
NA, not available; RD, retinal detachment; RR, relative risk; VEGF, vascular endothelial growth factor; VH, vitreous haemorrhage; WMD, weighted mean difference.