Table 3 Sensitivity and specificity of clock drawing test as function of Clinical Dementia Rating (CDR) and scoring system

Scoring system (“normal” range)Specificity, %Sensitivity by CDR, %
0.5: very mild≥1: at least mild>0: all dementia
Normal range cut points for the Mendez, Manos, and Sunderland scoring systems were based on the original authors’ recommendations.
AD Cooperative Study (>3)87369470
Pfizer Eisai (>2)93368062
Mendez (>18)60609782
Manos (>7)80449775
Rouleau (>5)93208658
Sunderland (>5)93208357