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Table 5 Optimum cut-off values with the highest sensitivity and specificity

From: Early diagnosis of keratoconus using corneal biomechanics and OCT derived technologies

Parameters

FFKC vs. Normal

AUROC

Sensitivity

Specificity

Cutoff

Posterior asymmetry (D)

0.778

0.58

0.88

0.08

P < 0.001

CBI

0.762

0.54

0.93

0.46

P < 0.001

BAD-D

0.774

0.64

0.86

1.43

P < 0.001

TBI

0.759

0.64

0.86

0.25

P < 0.001

Posterior asymmetry + CBI

0.863

0.74

0.91

N/A

P < 0.001

  1. FFKC = forme fruste keratoconus; AUROC = area under the receiver operating characteristic curve; CBI = Corvis biomechanical index; BAD-D = Belin/Ambrósio enhanced ectasia display total deviation; TBI = tomographic and biomechanical index