Table 1.

Correlation between keratectasia volume (KEV) and preoperative parameters

Parameter	r value	p value
Kmax	0.806	< 0.0005
TCT	−0.520	0.001
Corneal volume	0.178	0.273
Max decentration	0.596	< 0.0005
Irregularity	0.277	0.084
Q value	0.620	< 0.0005
Eccentricity	0.557	< 0.0005
Progression index	0.708	< 0.0005
ΔKmax	−0.635	< 0.0005

TCT thinnest corneal thickness, p value Pearson correlation test