Supplemental Table 3. Baseline characteristics of patients before and after propensity-score matching for IC alone vs CUD alone.

		Before propensity-score matching			After propensity-score matching
		IC alone	CUD alone	Standardized differences	IC alone	CUD alone	Standardized differences
Sample size (n)		431	97		94	94
Age, year		64.1 ±13.8	58.7±14.8	0.38	58.1±14.0	58.6±14.9	-0.03
Sex				0.01			-0.13
	Male	236 (54.8)	52 (53.6)		44 (46.8)	50 (53.2)
	Female	195 (45.2)	44 (45.4)		50 (53.2)	44 (46.8)
	Missing	0 (0)	1 (1.0)		0	0
Race				0.22			0.04
	Caucasian	349 (81.0)	86 (88.7)		82 (87.2)	83 (88.3)
	African American	32 (7.4)	5 (5.2)		5 (5.3)	5 (5.3)
	Other/Unknown	50 (11.6)	6 (6.2)		7 (7.5)	6 (6.4)
BMI		28.3±7.8	27.4±6.9	0.12	26.3±7.5	27.3±6.8	-0.13
ASA category				0.37			0.13
	1 - 2	92 (21.4)	37 (38.1)		30 (31.9)	36 (38.3)
	3 - 4	339 (78.6)	60 (61.9)		64 (68.1)	58 (61.7)
Cardiac history		13 (3.0)	2 (2.1)	0.06	5 (5.3)	2 (2.1)	0.17
Neurologic history		28 (6.5)	4 (4.1)	0.11	4 (4.3)	4 (4.3)	0
History of COPD		29 (6.7)	6 (6.2)	0.02	5 (5.3)	6 (6.4)	-0.04
Diabetes		92 (21.4)	12 (12.4)	0.24	13 (13.8)	11 (11.7)	0.06
Dialysis		5 (1.2)	3 (3.1)	-0.13	4 (4.3)	3 (3.2)	0.06
Active smoking		79 (18.3)	25 (25.8)	-0.18	27 (28.7)	24 (25.5)	0.07
Pre-operative chemotherapy		4 (0.9)	2 (2.1)	-0.01	0 (0)	2 (2.1)	-0.04
Pre-operative radiotherapy		1 (0.2)	1 (1.0)	-0.02	0 (0)	1 (1.1)	-0.07
Chronic steroid use		15 (3.5)	0 (0)	0.27	0 (0)	0 (0)	0
Functional status				-0.06			0
	Independent	368 (85.4)	83 (85.5)		82 (87.2)	82 (87.2)
	Partially or totally dep endent	63 (14.6)	12 (12.4)		12 (12.8)	12 (12.8)
	Unknown	0 (0)	2 (2.1)		0 (0)	0 (0)
Total operation time (minutes)		328±138	325±118	0.03	326±142	324±119	0.01