Table 5.

Classification results of patients with stages 2 (n=53) and 3 keratoconus (n=29) on the testing sets

Stage 2 versus stage 3	Accuracy	Sensitivity	Specificity	AUC
Axial map	0.6463 (0.561 to 0.7317)	1.0 (1.0 to 1.0)	0.0 (0.0 to 0.0)	0.5 (0.5 to 0.5)
Thickness map	0.7683 (0.6951 to 0.8415)	0.4138 (0.2727 to 0.5769)	0.9623 (0.9184 to 1.0)	0.6880 (0.6151 to 0.7708)
Front elevation map	0.7561 (0.6707 to 0.8293)	0.4483 (0.2903 to 0.6071)	0.9245 (0.8571 to 0.9808)	0.6864 (0.5977 to 0.7712)
Back elevation map	0.7927 (0.7195 to 0.8659)	0.5172 (0.3571 to 0.6774)	0.9434 (0.8846 to 0.9825)	0.7303 (0.6463 to 0.8128)
Concatenated	0.8537 (0.7927 to 0.9146)	0.6897 (0.5455 to 0.8333)	0.9434 (0.8846 to 0.9836)	0.8165 (0.7398 to 0.8908)
Majority voting	0.7317 (0.6585 to 0.8049)	0.2759 (0.1389 to 0.4194)	0.9811 (0.9444 to 1.0)	0.6285 (0.5577 to 0.7012)

95% CI in brackets.

AUC, area under the curve.