Table 4.
Mean changes in keratoconus parameters over 12-month follow-up (n = 31, x ± s)
| Preoperative | 1-month | 6-month | 12-month | F | P | ||
|---|---|---|---|---|---|---|---|
| SIf (D) | 5.65 ± 3.12 | 3.64 ± 3.20* | 3.62 ± 2.66* | 3.30 ± 2.82* | 21.950 | < 0.001 | |
| KVf (µm) | 30.32±12.62 | 31.00±13.89 | 27.97±12.66*# | 26.77±12.23*#& | 19.741 | < 0.001 | |
| BCVf (μm) | 2.93±1.29 | 2.88±1.48 | 2.47±1.48*# | 2.49±1.25*# | 8.357 | < 0.001 | |
| ThkMin (μm) | 465 ± 24 | 387 ± 34* | 400 ± 32*# | 414 ± 35*#& | 75.081 | < 0.001 | |
Abbreviations: SIf curvature symmetry index front; KVf keratoconus vertex front; BCV Baiocchi Calossi Versaci index front; ThkMin thinnest corneal thickness
* significant difference compared with preoperative baseline (P < 0.05)
# significant difference compared with postoperative 1-month (P < 0.05)
& significant difference compared with postoperative 6-month (P < 0.05)