Table 2.

Fail rates of tests of attention or organized thinking in subjects with dementia, without delirium

level of impairment	N	fail rate test of attention (95% CI)	spearman correlation	fail rate test of organized thinking (95% CI)	spearman correlation
CPS staging (rate, CI)
Normal/borderline	30	0.10 (0.03–0.26)		0.03 (0.01–0.17)
Mild	75	0.16 (0.09–0.26)		0.09 (0.05–0.18)
Moderate	27	0.56 (0.37–0.72)		0.56 (0.37–0.72)
(Very) severe	25	0.72 (0.52–0.86)		0.52 (0.34–70)
All	157**	0.31 (0.24–0.38)	0.478*	0.23 (0.17–0.30)	0.471*
MMSE staging (rate, CI)
30–25 Normal/questionable	24	0.04 (0.01–0.20)		0.00 (0.00–0.13)
24–21 Mild	40	0.08 (0.02–0.20)		0.08 (0.03–0.20)
20–10 Moderate	66	0.27 (0.18–0.39)		0.17 (0.10–0.27)
9–0 Severe	30	0.80 (0.63–0.90)		0.67 (0.49–0.81)
All	160**	0.29 (0.22–0.36)	0.531*	0.21 (0.16–0.28)	0.480*

*p < 0.001; **6 out of 163 CPS cores were missing and 3 out of 163 MMSE scores were missing. CI: confidence interval.