Table 3.

Performance characteristics at each cutoff of SARC-F (a), SARC-CalF (b), and SARC-F + EBM (c) with sensitivity, specificity, false positive rate, and Youden index.

Test	Cutoff ≥	Sensitivity	Specificity	False positive rate	Youden index
a. SARC-F ≥
	1	81.0	29.7	24.6	0.107
	2	52.4	37.8	19.3	− 0.098
	3	42.9	59.5	23.1	0.024
	4	28.6	75.7	25.0	0.043
	5	4.8	87.8	10.0	− 0.074
b. SARC-CalF ≥
	8	90.5	67.6	44.2	0.570
	9	90.5	67.6	44.2	0.570
	10	90.5	68.9	45.2	0.584
	11	76.2	78.4	50.0	0.536
	12	52.4	82.4	45.8	0.338
c. SARCF + EBM ≥
	8	77.3	84.6	58.6	0.609
	9	77.3	84.6	58.6	0.609
	10	77.3	87.2	63.0	0.635
	11	59.1	93.6	72.2	0.517
	12	40.9	96.2	75.0	0.361

Youden index = (Sensitivity + Specificity − 1).