Table 1.

Demographic characteristic of the discovery and replication cohorts (N = 502)

	Delirium		Dementia		Day1 BSEEG
	Case	Control	Case	Control	Positive	Negative
n	168	334	114	388	212	290
Female, n (%)	81 (48.2)	177 (53.0)	68 (59.6)	190 (49.0)	106 (50.0)	152 (52.4)
Age, mean (SD), (year)	73.5 (9.4)*	71.6 (9.8)	76.3 (9.0)*	71.0 (9.6)	72.8 (9.0)*	71.8 (10.2)
CCI, mean (SD)	4.3 (2.8)*	3.0 (2.9)	4.3 (3.0)*	3.1 (2.9)	3.9 (2.9)*	3.0 (2.9)

^* P < 0.01 vs. Control or Negative.

BSEEG, bispectral electroencephalography; CCI, Charlson Comorbidity Index.