Chapter 4 98 c. MCI (n=153) versus SNoCI (n=56) Table 3. Area Under the Curve between variations of groups and their sensitivity, specificity, PPV and NPV at cutoff scores 26 and 21 with the best Youden index (n=292). groups CutOff <26 CutOff <21 AUC SE Sens Spec PPV NPV Sens Spec PPV NPV Dem vs NoDem .830 .026 98 17 31 95 90 65 50 94 Dem vs MCI .810 .029 98 6 36 83 90 63 56 92 CI vs SNoCI .770 .040 95 47 88 68 56 73 90 28 MCI vs SNoCI .707 .048 94 47 83 72 37 73 79 30 Dem: Dementia; NoDem: No Dementia (MCI+SNoCI); MCI: Mild Cognitive impairment; SNoCI: Suspected patients no Cognitive Impairment; CI; Cognitive Impairment (Dem+MCI). AUC: area under the Curve; SE: Standard Error; Sens: sensitivity; Spec: specificity; PPV: positive predictive value; NPV: negative predictive value.
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