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. 2017 Mar 15;12:897–905. doi: 10.2147/COPD.S129974

Table 11.

The cutoff value of Fres and its sensitivity, specificity, and Youden’s index

Fres cutoff values Sensitivity Specificity Youden’s index
Overall subjects 17.715 0.789 0.931 0.720
Geriatric subjects 16.94 0.853 0.860 0.713
Advanced elderly 16.94 0.829 0.885 0.714

Abbreviation: Fres, resonant frequency.