Research Article

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

Table 2

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

Cut-off scoreAuROC [95% CI]Sensitivity [95% CI]Specificity [95% CI]LR+ [95% CI]

Infinity loops (0-1)00.57 [0.5–0.64]17.1% [6.6–33.6]96.7% [88.5–99.6]5.1 [1.1–24.1]
Cube (0–2)≤10.65 [0.49–0.7]65.7% [47.8–80.9]53.3% [40.0–66.3]1.4 [1.0–2.0]
CDT (0–5)≤40.64 [0.53–0.74]57.1% [39.4–73.7]70.0% [56.8–81.2]1.9 [1.2– 3.1]

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