Table 4.
Laser parameters in eyes with and without ERM.
| Laser parameters | Eyes without ERM | Eyes developing ERM | P valuea |
|---|---|---|---|
| Number of laser spots | 284.8 ± 156.4 | 390.1 ± 171.9 | <0.001 |
| Single-spot power (mW) | 308.8 ± 181.9 | 387.0 ± 111.2 | 0.016 |
| Total energy (J) | 13.6 ± 11.9 | 22.5 ± 10.8 | <0.001 |
| Laser coverage (number of clock hours) | 3.08 ± 2.10 | 4.47 ± 3.38 | 0.028 |
| Location of the laser | 0.920 | ||
| Superior | 219 (31.6%) | 9 (28.1%) | |
| Nasal or temporal | 293 (42.2%) | 14 (43.8%) | |
| Inferior | 182 (26.2%) | 9 (28.1%) | |
| Multiple quadrantsb | 220 (31.7%) | 13 (40.6%) | |
| Minimum distance between the laser and the fovea (DD) | 8.36 ± 2.16 | 7.50±1.72 | 0.017 |
ERM epiretinal membranes, DD disc diameter.
aData were presented as mean ± standard deviation and were analysed using an independent samples t-test. P values of <0.05 were considered significant.
bMultiple quadrants is defined as the laser covering two or more of the retinal regions.