Characteristics of patient cohort followed for development of delirium and those excluded for missing data or other reasons.

		Included	Excluded	P value
Number of patients		310	27
Age		61.6 ± 14.1	53.8 ±14.5	0.007*
Sex	Male	194 (62.6%)	15 (55.6%)	0.47†
	Female	116 (37.4%)	12 (44.4%)
Race	Caucasian	254 (81.9%)	22 (81.5%)	0.31†
	African-American	38 (12.3%)	5 (18.5%)
	Other/Unknown	18 (5.8%)	0
Alive at last follow-up		270 (87.1%)	24 (88.9%)	0.79†
BAG-RECALL study group	BIS group	149 (48.1%)	10 (37.0%)	0.27†
	ETAC group	161 (51.9%)	17 (63.0%)
Duration of surgery (minutes)		259 ± 86	245 ±69	0.41*
Surgery with CPB		245 (78.6%)	20 (74.1%)	0.55†
ICU length of stay (days)		3 (2 – 6)	2 (1 – 6)	0.35‡
Hospital length of stay (days)		8 (6 – 12)	7 (5 – 9)	0.30‡
Type of surgery	CABG only	78 (25.2%)	9 (33.3%)	0.027†
	>1 of CABG, valve, Maze	30 (9.7%)	1 (3.7%)
	Aortic aneurysm	40 (12.9%)	2 (7.4%)
	Valve only	76 (24.5%)	8 (29.6%)
	Other cardiac	47 (15.2%)	3 (11.1%)
	Thoracic	39 (12.6%)	2 (7.4%)
	Not cardiac or thoracic	0	2 (7.4%)

^*Student’s t-test.

^†chi square.

^‡Mann-Whitney U test.

Abbreviations: BIS, Bispectral Index. ETAC, end-tidal anesthetic concentration.CPB, cardiopulmonary bypass.ICU, intensive care unit. CABG, coronary artery bypass graft.