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. Author manuscript; available in PMC: 2023 Feb 1.
Published in final edited form as: J Refract Surg. 2022 Feb 1;38(2):112–119. doi: 10.3928/1081597X-20211116-01

Table 2.

Average Cutoff Value and Classification Accuracy for Each Group from Repeated 5-fold Cross-Validation of the EM Index

Classification Accuracy (%)
Non-Keratoconus Keratoconus
Cutoff Normal Warpage Manifest Subclinical Forme Fruste
1.24 ± 0.02 100 ± 0 99.0 ± 2.0 100 ± 0 100 ± 0 53.1 ± 1.5

In the logistic regression model, the negative class was composed of the normal and warpage eyes, and all of the keratoconus eyes were included in the positive class.