Table 2.

Diagnostic accuracy of the AQ in MCI and AD

	Sensitivity (95% CI)	Specificity (95% CI)	AUC (95% CI)	LR+ (95% CI)	LR− (95% CI)	Cut-off score
MCI	89.00 (81.20–94.40)	91.00 (83.60–95.80)	0.95 (0.91–0.97)	9.89 (9.00–10.80)	0.12 (0.05–0.30)	5 ≤ 14
AD	99.00 (94.60–100.00)	96.00 (90.10–98.90)	0.99 (0.96–1.00)	24.75 (23.70–25.90)	0.01 (0.001–0.09)	15≤a

MCI, mild cognitive impairment; AD, Alzheimer's disease.

^aCut-off score derived through ROC analysis of MCI and AD cases with AD as outcome and MCI as the reference group; all other values for AD derived using CN as the reference group.