Table 3.

Classification results of health volunteers (n=20) and patients with stages 1 keratoconus (n=40) on the testing sets

Healthy versus stage 1	Accuracy	Sensitivity	Specificity	AUC
Axial map	0.6667 (0.5667 to 0.7667)	1.0 (1.0 to 1.0)	0.0 (0.0 to 0.0)	0.5 (0.5 to 0.5)
Thickness map	0.8667 (0.8 to 0.9333)	0.875 (0.7857 to 0.9524)	0.8500 (0.7143 to 0.9630)	0.8625 (0.7792 to 0.9375)
Front elevation map	0.8000 (0.7167 to 0.8833)	0.8750 (0.7838 to 0.9535)	0.6500 (0.4583 to 0.8235)	0.7625 (0.6584 to 0.8562)
Back elevation map	0.8500 (0.7667 to 0.9167)	0.8750 (0.7838 to 0.9524)	0.8 (0.6471 to 0.9412)	0.8375 (0.7457 to 0.9167)
Concatenated	0.9 (0.8333 to 0.9500)	0.9245 (0.8537 to 0.9783)	0.85 (0.7143 to 0.96)	0.8875 (0.8103 to 0.9556)
Majority voting	0.9167 (0.8500 to 0.9667)	0.9500 (0.8864 to 1.0)	0.8500 (0.7143 to 0.9600)	0.9000 (0.8242 to 0.9653)

95% CI in brackets.

AUC, area under the curve.