Table 3.
Variation of different progression parameters between measurements (12 ± 3 months apart) in groups with or without KCE progression.
| No progression in KCE (n = 50) | Progression in KCE (n = 63) | P value | |||
|---|---|---|---|---|---|
| ΔKmax (mean, SD) | − 0.02 | 1.019 | 0.78 | 1.467 | 0.001 |
| ΔKm (median/IQR) | − 0.10 | 0.30 | 0.50 | 0.70 | < 0.001 |
| ΔK1 (mean, SD) | − 0.05 | 0.251 | 0.59 | 0.593 | < 0.001 |
| ΔK2 (mean, SD) | − 0.07 | 0.503 | 0.76 | 0.803 | < 0.001 |
| ΔISV (mean, SD) | 0.64 | 3.439 | 3.14 | 9.411 | 0.054 |
| ΔARTmax (median/IQR) | − 4.00 | 35.00 | − 3.00 | 27.00 | 0.178 |
| ΔPakmin (mean, SD) | 1.61 | 9.855 | − 2.02 | 11.205 | 0.073 |
| Δ D-Index (mean, SD) | 0.19 | 0.473 | 0.56 | 0.867 | 0.005 |
| ΔELEBmax (mean, SD) | 1.54 | 3.233 | 4.06 | 6.217 | 0.008 |
| ΔPCR (mean, SD) | − 0.05 | 0.066 | − 0.08 | 0.126 | 0.152 |
| ΔAstg (mean, SD) | − 0.02 | 0.431 | 0.17 | 0.813 | 0.121 |
KCE keratoconus enlargement, Kmax maximum keratometry, Km mean keratometry, K1 keratometry of flat meridian, K2 keratometry of steepest meridian, ISV index of surface variance, ARTmax Ambrósio relational thickness maximum, PachyMin minimum pachymetry, D-Index Belin/Ambrósio D-Index, ELEBmax maximum elevation of corneal back surface, PCR posterior radius of curvature from the 3.0 mm centered on the thinnest point, Astig corneal astigmatism, Δ represents the variations of parameter readings between the first and the second measurement after 12 ± 3 months.