Table 1:

Subject Characteristics

	Overall (N=207)	Not Delirious (N=181)	Delirious (N=26)	Standardized Difference
Age	68 [64, 73]	68 [64, 72]	70 [65, 75]	0.256
Sex (Male)	114 (55.1%)	99 (54.7%)	15 (57.7%)	0.635
Race				0.285
Black or African American	26 (12.6%)	21 (11.6%)	5 (19.2%)
Caucasian/White	178 (86.0%)	158 (87.3%)	20 (76.9%)
Other	3 (1.4%)	2 (1.1%)	1 (3.8%)
Body Mass Index	29.0 [25.1, 33.1]	29.1 [25.5, 33.7]	28.5 [23.9, 30.8]	0.364
APOE4 Carrier a	54 (26.9%)	48 (27.0%)	6 (26.1%)	0.020
Years of Education	16 [13, 18]	16 [14, 18]	14 [12, 16]	0.483
Baseline Cognitive Index b	0.01 (0.72)	0.11 (0.64)	−0.69 (0.86)	1.051
Mini-Mental Status Exam Score c	29 [27, 29]	29 [28, 29]	26 [23, 29]	1.103
Duke Activity Status Index d	21 [11, 39]	21 [11, 39]	21 [7, 42]	0.065
Charlson Comorbidity Index	4 [3, 6]	4 [3, 6]	4 [3, 5]	0.244
ASA Physical Status Class	3 [2, 3]	3 [2, 3]	3 [3, 3]	0.290
Surgery Type				0.129
Thoracic	26 (12.6%)	23 (12.7%)	3 (11.5%)
General/Abdominal/Plastic/ENT	67 (32.4%)	58 (32.0%)	9 (34.6%)
Urologic/Gynecologic	58 (28.0%)	50 (27.6%)	8 (30.8%)
Orthopedic	56 (27.1%)	50 (27.6%)	6 (23.1%)

¹Wilcoxon

²Chi-square

^a-APOE4 genotype missing for 6

^b-baseline cognitive index missing for 4

^c-MMSE missing for 1 subject

^d-DASI missing for 2.