Rotating Scheimpflug Imaging Indices in Different Grades of Keratoconus

Table 4

Scheimpflug imaging indices differentiating between GROUP 2a KC and normal corneas.

Indices	AUROC	SEM	95% CI	value
PPI-Max	0.690	0.038	0.615 to 0.765	0.018
ART-Max	0.690	0.038	0.615 to 0.764	0.019
PPI-Max minus PPI-Min	0.687	0.055	0.579 to 0.796	0.020
Central corneal thickness	0.683	0.048	0.590 to 0.776	0.023
Diagonal decentration of the thinnest point from the apex	0.674	0.062	0.552 to 0.795	0.031

AUROC: area under the receiver operating characteristic curve, SEM: standard error of the mean, 95% CI: 95% confidence interval of the AUROC, PPI-Max: Pachymetry Progression Index-Maximum, ART-Max: Ambrósio’s Relational Thickness-Maximum, and PPI-Min: Pachymetry Progression Index-Minimum.