Table 3.
The mean±standard deviation of parameters 12 months after the procedure in the two groups
| Parameter | Epithelium-removal CXL group (n=34) | Daya CXL group (n=30) | P* |
|---|---|---|---|
| UCVA (logMAR) | 0.4±0.3 | 0.43±0.32 | 0.868 |
| BCVA (logMAR) | 0.19±0.1 | 0.15±0.17 | 0.937 |
| SE (D) | −3.2±2.8 | −3.3±2.7 | 0.0001** |
| Front mean K (D) | 45.9±6.3 | 46.9±3.1 | 0.259 |
| Front K-max (D) | 53.2±7.7 | 53.9±5.1 | 0.372 |
| Back K-max (D) | −7.4±1.2 | −7.1±0.6 | 0.109 |
| Apex pachymetry (µm) | 440±46 | 466±39 | 0.0001** |
| Thinnest pachymetry (µm) | 428±46 | 455.2±39 | 0.0001** |
| Min Epi (µm) | 45.6±4.7 | 46.2±3.9 | 0.483 |
| Max Epi (µm) | 61.7±4.7 | 64.3±5.9 | 0.081 |
| S (µm) | 53.9±3.4 | 56.1±4.3 | 0.028 |
| I (µm) | 55±3.5 | 56.7±4.3 | 0.363 |
| BCL removal (days) | 4.5±1.3 | 3.1±1.1 | ˂0.0001 |
| Postoperative pain (analog pain score) | 4.4±2.5 | 2.4±1.8 | 0.001** |
*Change of the variables before and after treatment was compared between the two groups, **Indicates for statistically significant P value, (P<0.05). CXL: Corneal collagen cross-linking, UCVA: Uncorrected visual acuity, BCVA: Best corrected visual acuity, SE: Spherical equivalent, D: Diopter, Mean K: Mean keratometry, K-max: Maximum keratometry, Min Epi: Minimum epithelial thickness, Max Epi: Maximum epithelial thickness, S: Superior epithelial thickness, I: Inferior epithelial thickness, BCL: Bandage contact lens