Table 1 Inter-rater reliability of clock drawing scores and relation between clock drawing and Clinical Dementia Rating (CDR)

Scoring systemInter-rater reliabilityRelation with CDR
r (95% CI)Weighted κ (95% CI)rs (95% CI)
All p < 0.0001, n = 75.
r = Pearson correlation coefficient; weighted κ = weighted κ statistic; rs = Spearman correlation coefficient.
AD Cooperative Study0.91 (0.86–0.94)0.77 (0.69–0.86)−0.74 (−0.68 to −0.79)
Pfizer Eisai0.93 (0.89–0.96)0.83 (0.76–0.91)−0.71 (−0.65 to −0.76)
Mendez0.97 (0.95–0.98)0.83 (0.78–0.87)−0.71 (−0.65 to −0.76)
Manos0.93 (0.89–0.96)0.81 (0.74–0.88)−0.71 (−0.65 to −0.76)
Rouleau0.94 (0.91–0.96)0.72 (0.65–0.79)−0.74 (−0.68 to −0.79)
Sunderland0.94 (0.91–0.96)0.79 (0.73–0.84)−0.69 (−0.62 to −0.75)