Diagnostic Accuracy of the Overlapping Infinity Loops, Wire Cube, and Clock Drawing Tests for Cognitive Impairment in Mild Cognitive Impairment and Dementia

Table 3

Cut-off score, area under receiver operating characteristic (AuROC) curve, and diagnostic accuracy of three drawing tests for detection of dementia from nondementia.

	Cut-off score	AuROC [95% CI]	Sensitivity [95% CI]	Specificity [95% CI]	LR+ [95% CI]
Infinity loops (0-1)	0	0.78 [0.7–0.85]	63.8% [48.5–77.3]	91.6% [84.1–96.3]	7.6 [3.8–15.2]
Cube (0–2)	≤1	0.7 [0.67–0.76]	93.6% [82.5–98.7]	46.3% [36.0–56.8]	1.7 [1.4–2.1]
CDT (0–5)	≤2	0.82 [0.75–0.89]	76.6% [62.0–87.7]	87.4% [79.0–93.3]	6.1 [3.5–10.5]

AuROC: area under receiver operating characteristic; LR+: likelihood ratio if test positive; CDT: the clock drawing test.