Table 6.

Diagnostic score classification between SCD and HC.

Total Scores between SCD and HC	Cutoff	AUC	Sensitivity	Specificity	95% CI	p-Value
$S_{\Sigma }$	1.0263	0.964	96.6%	95%	0.902–1.000	<0.001
$S_{{\Sigma }^2}$	0.3149	0.972	100%	95%	0.918–1.000	<0.001
$S_{{\Sigma }^{2}AUC}$	0.2689	0.974	100%	95%	0.923–1.000	<0.001
$S_{{\Sigma }^{2}AU{C}^2}$	0.2297	0.974	100%	95%	0.923–1.000	<0.001
$S_{\Sigma }^{\sigma }$	3.7292	0.971	100%	95%	0.913–1.000	<0.001
${\mathit{S}}_{{\mathsf{\Sigma }}^2}^{\mathsf{\sigma }}$	1.2236	0.976	100%	95%	0.928–1.000	<0.001
$S_{{\Sigma }^{2}AUC}^{\sigma }$	1.0479	0.974	100%	95%	0.923–1.000	<0.001
$S_{{\Sigma }^{2}AU{C}^2}^{\sigma }$	0.8982	0.972	100%	95%	0.918–1.000	<0.001

Abbreviations: SCD: Adults with Subjective Cognitive Decline; HC: Cognitively Healthy Advanced-age Adults (above 50 years); AUC: Area Under the Curve; CI: Confidence interval; Values in bold: the best discrimination formula and its score.