Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
ROC curve of age in predicting moderate and severe periodontitis. The AUC on the basis of the AUC for age in predicting moderate periodontitis and severe periodontitis are 0.71 and 0.70, respectively. The cutoff values of ages (46 years for moderate periodontitis and 45 for severe periodontitis) were identified on the basis of the highest Youden indices. AUC = area under the curve, ROC = receiver operating characteristic. ∗Youden index = [Sensitivity + Specificity − 1].
