Table 3.
Subgroup analyses on country.
| Country (China versus Others) | Studies | Eyes | OR or MD (95%CI) | P | I2 |
| Preoperative Q-value | 11 | 1605 | MD −0.00 (−0.02, 0.02) | .922 | 68.0% |
| China | 8 | 1340 | MD −0.01 (−0.03, 0.01) | .398 | 74.7% |
| Others | 3 | 265 | MD 0.04 (0.00, 0.08) | .019 | 0.0% |
| Postoperative Q-value | 11 | 1655 | MD −0.42 (−0.64, −0.21) | .000 | 98.4% |
| China | 8 | 1390 | MD −0.30 (−0.51, −0.10) | .003 | 97.9% |
| Others | 3 | 265 | MD −0.75 (−1.12, −0.38) | .000 | 96.4% |
| HOA | 10 | 1309 | MD −0.14 (−0.23, −0.06) | .001 | 98.5% |
| China | 7 | 1044 | MD −0.10 (−0.14, −0.05) | .000 | 92.4% |
| Others | 3 | 265 | MD −0.22 (−0.37, −0.07) | .004 | 98.3% |
| Vertical coma-like aberration | 6 | 455 | MD −0.01 (−0.03, 0.01) | .263 | 0.0% |
| China | 5 | 404 | MD −0.01 (−0.05, 0.02) | .424 | 0.0% |
| Others | 1 | 51 | MD −0.01 (−0.03, 0.01) | .423 | / |
| Spherical-like aberration | 12 | 1305 | MD −0.19 (−0.32, −0.06) | .004 | 99.2% |
| China | 9 | 1040 | MD −0.18 (−0.37, 0.00) | .055 | 99.3% |
| Others | 3 | 265 | MD −0.22 (−0.43, −0.01) | .039 | 99.3% |