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Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
Copyright © 2014 Korean Endocrine Society
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Units for insulin-glucose ratio and amended insulin-glucose ratio: (pmol/L)/(mmol/L). Units for C-peptide-glucose ratio and amended C-peptide-glucose ratio: (nmol/L)/(mmol/L). Youden index=sensitivity+specificity-1.
PPV, positive predictive value; NPV, negative predictive value; ESCPG, Endocrine Society Clinical Practice Guideline.
Paired tests comparing any two ROC curves by the method described by DeLong et al. [10] showed no significant difference.
ROC, receiver operating characteristic; AUC, area under the curve; CI, confidence interval.