Table 2. Prediction of cognitive impairment in accordance with the CDT (n=182).

CDT (total score)	MMSE (total score)		Predictive value (%)
	Cognitive impairment (<24)	Normal (≥24)
≤10	76	4	PPV=95.0
>11	12	90	NPV=88.2
Youden index (%)	Sensitivity=86.4, specificity=95.7

PPV: positive predictive value; NPV: negative predictive value