TABLE 1.

Characteristics of patients undergoing primary TKA and THA in the NSQIP data 2010–2013

	TKA (N=62075)					THA (N=39334)
Number, (%)	White Men 21900 (35.3)	White Women 35530 (57.2)	Black Men 1190 (1.9)	Black Women 3455 (5.6)	P-value	White Men 16167 (41.1)	White Women 20330 (51.7)	Black Men 1318 (3.4)	Black Women 1519 (3.9)	P-value
Age, years, mean (SD)	66.8 (9.6)	67.2 (9.8)	62.5 (10.1)	63.6 (9.9)	<.001	63.7 (11.2)	66.7 (11.0)	58.3 (11.0)	62.3 (11.7)	<.001
BMI, mean (SD)	32.1 (6.3)	33.2 (7.5)	33.4 (7.1)	36.3 (8)	<.001	30.7 (6)	29.6 (6.9)	30.6 (6.7)	32.4 (7.2)	<.001
Smoker, number (%)	1962 (9.0)	2677 (7.5)	197 (16.6)	454 (13.1)	<.001	2157 (13.3)	2397 (11.8)	360 (27.3)	332 (21.9)	<.001
Chronic steroid use, number (%)	539 (2.5)	1272 (3.6)	31 (2.6)	142 (4.1)	<.001	443 (2.7)	774 (3.8)	42 (3.2)	100 (6.6)	<.001
ASA class 3 or above, number (%)	10569 (48.3)	16297 (45.9)	650 (54.6)	2008 (58.1)	<.001	6831 (42.3)	8022 (39.5)	647 (49.1)	787 (51.8)	<.001
Hematocrit, mean (SD)	42.5 (4.0)	39.7 (3.6)	40.8 (4.4)	37.8 (3.5)	<.001	42.3 (4.2)	39.4 (3.9)	40.6 (4.5)	37.6 (3.9)	<.001
Comorbidities
Diabetes, number, (%)	4030 (18.4)	5472 (15.4)	321 (27)	821 (23.8)	<.001	2061 (12.7)	1915 (9.4)	249 (18.9)	276 (18.2)	<.001
Obesity, number, (%)	12680 (58.0)	22440 (63.3)	775 (65.2)	2681 (77.9)	<.001	7695 (47.7)	8441 (41.6)	636 (48.4)	914 (60.3)	<.001
Peripheral vascular disease, number, (%)	37 (0.2)	28 (0.1)	3 (0.3)	5 (0.1)	.032	37 (0.2)	23 (0.1)	5 (0.4)	1 (0.1)	.009
Hypertension, number, (%)	14660 (66.9)	23204 (65.3)	918 (77.1)	2746 (79.5)	<.001	9504 (58.8)	11457 (56.4)	868 (65.9)	1115 (73.4)	<.001
COPD, number, (%)	851 (3.9)	1205 (3.4)	32 (2.7)	135 (3.9)	.004	637 (3.9)	924 (4.5)	44 (3.3)	60 (3.9)	.012
CHF within last 30-days, number (%)	56 (0.3)	76 (0.2)	6 (0.5)	10 (0.3)	.166	63 (0.4)	54 (0.3)	9 (0.7)	8 (0.5)	.014