Table II.

Baseline characteristics of patients undergoing cases with or without an assistant surgeon.

	With Assistant Surgeon	No Assistant Surgeon	P-Value of Difference
	N = 9,306 (33%)	N = 19,284 (67%)
Age			.23
67-69	1,435 (15.4%)	3,170 (16.4%)
70-74	2,940 (31.6%)	6,094 (31.6%)
75-79	2,900 (31.2%)	5,879 (30.5%)
80-84	1,589 (17.1%)	3,218 (16.7%)
85+	442 (4.7%)	923 (4.8%)
Male Sex	6,831 (73.4%)	14,009 (72.6%)	.18
Cerebrovascular Disease	1,332 (14.3%)	2,760 (14.3%)	1.0
MI, past 6 months	125 (1.3%)	306 (1.6%)	.11
Valve Disease	770 (8.3%)	1,565 (8.1%)	.65
Congestive Heart Failure	948 (10.2%)	2,023 (10.5%)	.43
Hypertension	6,039 (64.9%)	12,471 (64.7%)	.71
Peripheral Vascular	1,924 (20.7%)	4,071 (21.1%)	.40
Disease
COPD	2,546 (27.4%)	5,435 (28.2%)	.15
Renal Failure	548 (5.9%)	1,149 (6.0%)	.82
ESRD	26 (0.3%)	70 (0.4%)	.25
Diabetes	1,464 (15.7%)	2,992 (15.5%)	.64