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. 2023 Nov 16;14:1259350. doi: 10.3389/fendo.2023.1259350

Table 4.

Receiver operating characteristic curve for diagnosis vs. Sarcopenia.

Men Women
AUC 95% CI Cut off Specificity Sensitivity vs. SMI AUC   95% CI Cut off Specificity Sensitivity vs. SMI
Min Max Min Max
Quantity Quantity
CSA, cm2 0.935 0.875 0.994 45.7 0.917 0.857 0.518 CSA, cm2 0.809 0.680 0.938 36.8 0.776 0.727 0.046
CSA / height, cm 0.917 0.863 0.971 0.304 0.842 0.857 0.952 CSA / height, cm 0.799 0.675 0.923 0.243 0.761 0.727 0.026
CSA / height2, % 0.871 0.797 0.944 0.191 0.758 0.857 0.167 CSA / height2, % 0.766 0.647 0.885 0.166 0.654 0.909 0.005
CSA / weight, cm2/kg 0.731 0.612 0.850 0.894 0.558 0.857 0.005 CSA / weight, cm2/kg 0.637 0.487 0.788 0.714 0.771 0.545 <0.001
CSA / BMI, 104·cm4/kg 0.875 0.791 0.960 2.21 0.833 0.857 0.388 CSA / BMI, 104·cm4/kg 0.690 0.535 0.845 1.76 0.693 0.636 0.001
ASM, kg 0.943 0.885 1.000 18.4 0.875 0.929 0.323 ASM, kg 0.904 0.832 0.975 12.5 0.834 0.818 0.366
SMI, kg / m2 0.915 0.868 0.963 6.91 0.812 1.000 SMI, kg / m2 0.932 0.897 0.967 5.38 0.878 1.000
ASM / weight, % 0.767 0.665 0.868 31.8 0.650 0.857 0.008 ASM / weight, % 0.772 0.633 0.911 26.5 0.649 0.818 0.018
ASM / BMI, m2 0.873 0.776 0.970 0.814 0.821 0.857 0.020 ASM / BMI, m2 0.756 0.599 0.912 0.586 0.776 0.636 0.398
Quality Quality
CTV, HU 0.746 0.620 0.871 53.4 0.654 0.857 0.010 CTV, HU 0.638 0.481 0.794 50.9 0.566 0.818 0.001
CTV / BMI, HU·m2/kg 0.583 0.433 0.734 2.40 0.562 0.714 <0.001 CTV / BMI, HU·m2/kg 0.576 0.419 0.734 2.49 0.698 0.545 <0.001
KES / CSA, N/cm2 0.560 0.406 0.713 7.81 0.487 0.714 <0.001 KES / CSA, N/cm2 0.647 0.425 0.869 5.88 0.805 0.636 0.016
Quality× Quantity Quality× Quantity
CSA × CTV, cm2·HU 0.936 0.882 0.990 2418 0.925 0.857 0.451 CSA × CTV, cm2·HU 0.824 0.743 0.905 1935 0.673 1.000 0.006
CSA × CTV / height, cm·HU 0.920 0.866 0.974 16.0 0.846 0.857 0.867 CSA × CTV / height, cm·HU 0.814 0.731 0.897 12.8 0.654 1.000 0.005
CSA × CTV / height2, HU 0.883 0.813 0.953 0.101 0.783 0.857 0.328 CSA × CTV / height2, HU 0.780 0.681 0.880 0.084 0.644 0.909 0.004
CSA × CTV / weight, cm2·HU/kg 0.775 0.676 0.874 47.1 0.646 0.786 0.014 CSA × CTV / weight, cm2·HU/kg 0.671 0.542 0.800 37.5 0.668 0.727 <0.001
CSA × CTV / BMI, 104·cm4·HU/kg 0.872 0.799 0.946 115.1 0.825 0.857 0.305 CSA × CTV / BMI, 104·cm4·HU/kg 0.723 0.605 0.842 89.6 0.654 0.727 <0.001
Physical performance Physical performance
Grip, kg 0.946 0.896 0.996 30.0 0.912 0.857 0.360 Grip, kg 0.976 * 0.954 0.999 17.9 0.917 1.000 0.046
KES, N 0.858 0.789 0.927 382 0.775 0.857 0.148 KES, N 0.800 0.684 0.916 255 0.693 0.727 0.039
Leg Power, W 0.856 0.775 0.938 396 0.818 0.786 0.149 Leg Power, W 0.791 0.710 0.872 274 0.736 0.900 0.002
Sit up, times 0.826 0.727 0.925 10.0 0.792 0.769 0.115 Sit up, times 0.641 0.413 0.869 3.0 0.728 0.667 0.015
Walking, m/seconds 0.846 0.757 0.936 1.32 0.738 0.786 0.120 Walking, m/seconds 0.486 0.292 0.679 1.38 0.483 0.545 <0.001
Fast walking, m/seconds 0.798 0.673 0.922 1.80 0.750 0.786 0.077 Fast walking, m/seconds 0.607 0.401 0.813 1.77 0.539 0.727 0.002
Balance, seconds 0.788 0.652 0.923 4.00 0.733 0.714 0.087 Balance, seconds 0.707 0.552 0.861 5.00 0.580 0.727 0.005
Reaction, seconds 0.724 0.581 0.866 0.479 0.803 0.643 0.012 Reaction, seconds 0.488 0.323 0.653 0.439 0.405 0.727 <0.001
Age, years 0.892 0.816 0.968 72.0 0.821 0.857 0.543 Age, years 0.735   0.587 0.882 67.0 0.702 0.727 0.010

Bold: 0.700 or higher; red bold: 0.900 or higher.

* Significant higher AUC relative to SMI (p<0.05).

Abbreviations: AUC, area under the curve; CI, confidence interval; CSA, cross-sectional area; BMI, body mass index; ASM, appendicular skeletal muscle mass; SMI, skeletal muscle mass index; CTV, computed tomography attenuation value; HU, Hounsfield unit; KES, knee extension strength.