Table 8.
Mean thinnest pachymetry before and after cross-linking with P-values (μm)
| Parameters | Preoperative | 3 months | 6 months | 1 year | P-value |
|---|---|---|---|---|---|
| Keratoconus | |||||
| Mean | 488.17 | 474.08 | 465.5 | 464.2 | <0.001 |
| ±SD | 32.3 | 31.2 | 31.2 | 31.2 | |
| P1 | 0.000 | 0.001 | 0.001 | ||
| P2 | 0.03 | 0.03 | |||
| P3 | 0.832 | ||||
| PostLASIK ectasia | |||||
| Mean | 446.6 | 431.8 | 424.6 | 425.2 | <0.001 |
| ±SD | 22.5 | 26.6 | 28.3 | 27.9 | |
| P1 | 0.000 | 0.001 | 0.001 | ||
| P2 | 0.05 | 0.05 | |||
| P3 | 1.000 | ||||
Notes: Significant at P<0.05; repeated-measures ANOVA test followed by post hoc LSD was used for pairwise comparisons. P1: Significance relative to preoperative; P2: significance relative to 3-month period; P3: significance relative to 6-month period.
Abbreviations: ANOVA, analysis of variance; LASIK, laser-assisted in situ keratomileusis; LSD, least significant difference; SD, standard deviation.