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Table 5 Comparison of suggested cutoff values and their sensitivity and specificity levels for the diagnosis of keratoconus (KC) and KC suspect (KCS) in Down syndrome (DS) patients of the present study compared to non-DS young patients in other studies

From: Tomography-based definition of keratoconus for Down syndrome patients

 

DS patients

Non-DS patients

Cutoff

Sensitivity (%)

Specificity (%)

Cutoff

Sensitivity (%)

Specificity (%)

KC

Anterior HOA

> 0.643

86.96

82.24

> 0.801 [20]

100.0

100.0

Posterior vertical coma

> 0.0702

91.30

76.97

> 0.055 [20]

100.0

100.0

Anterior vertical coma

> 0.4124

73.91

93.42

> 0.200 [21]

94.1

96.7

Total HOA

> 0.608

95.65

67.76

> 0.908 [22]

86.5

81.1

KCS

Minimum corneal thickness

≤ 480.0

66.67

90.91

< 512.0 [23]

64.0

58.0

Corneal volume

≤ 55.3

66.67

75.32

< 23.95 [24]

79.0

79.3

BAD-D

> 2.23

64.58

76.32

> 1.6 [25]

83.8

86.0

  1. HOA = higher order aberrations; BAD-D = Belin Ambrosio display-total deviation