UKA			TKA
Cost	mUKA (n=6)	rUKA (n=29)	P Value	mTKA (n=58)	rTKA (n=85)	P Value
Anesthesia
Mean (SD)	523 (52)	586 (111)	.14	628 (90)	714 (103)	<.0001b
Range	(435, 879)	(416, 861)		(427, 825)	(530, 1104)
Imaging
Mean (SD)	26 (2)	40 (52)	.12	30 (7)	42 (59)	.0003b
Range	(24, 28)	(24, 306)		(24, 66)	(16, 439)
Labs
Mean (SD)	45 (18)	36 (46)	.55	49 (36)	65 (69)	.06
Range	(30, 72)	(2, 255)		(1, 216)	(1, 408)
Operating room
Mean (SD)	610 (258)	368 (129)	.002b	403 (174)	354 (124)	.05
Range	(194, 936)	(210, 674)		(163, 805)	(163, 713)
Other inpatient
Mean (SD)	305 (323)	363 (252)	.66	415 (280)	361 (247)	.27
Range	(27, 754)	(43, 670)		(27, 1059)	(34, 753)
Physician
Patients with any, n (%)	1 (1)	20 (69)	.03a	32 (5)	54 (64)	0.38
Mean (SD)	15 (38)	60 (57)	.93	75 (91)	72 (86)	0.33
Range	(0, 93)	(0, 167)		(0, 274)	(0, 318)
Preoperative CT
Patients with any, n (%)	0 (0)	29 (100)		0 (0)	85 (100)
Mean (SD)	—	114 (22)	<.0001b	—	115 (23)	<.0001b
Range	—	(74, 157)		—	(74, 165)
Preopertive prep
Mean (SD)	446 (287)	400 (302)	.75	400 (307)	494 (328)	.15
Range	(170, 728)	(87, 849)		(86, 901)	(86, 1001)
Recovery
Mean (SD)	226 (205)	613 (375)	.008a	258 (434)	602 (724)	<.0001b
Range	(70, 625)	(65, 1605)		(42, 1836)	(28, 2629)
Room
Patients with any, n (%)	4 (67)	4 (14%)		52 (90)	49 (58)
Mean (SD)	281 (218)	82 (217)	.02a	725 (593)	531 (677)	<.0001b
Range	(0, 436)	(0, 847)	.04a	(0, 3390)	(0, 2542)	.29
Supplies
Mean (SD)	651 (176)	1161 (384)	<.0001b	868 (518)	1042 (525)	.03a
Range	(435, 850)	(713, 2034)		(406, 3340)	(456, 2130)
Therapy
Mean (SD)	160 (44)	201 (76)	.24	235 (103)	287 (126)	.01b
Range	(121, 235)	(28, 370)		(86, 442)	(71, 663)
Total perioperative costs
Mean (SD)	3287 (271)	4025 (489)	.0001b	4087 (1085)	4668 (644)	<.0001b
Range	(3002, 3632)	(2674, 4719)		(2745, 7903)	(3330, 6376)
Length of stay (days)
Mean (SD)	1.6 (0.5)	1.4 (0.6)	.51	1.8 (0.6)	1.8 (0.8)	.94
Range	(1.2, 2.3)	(0.4, 3.3)		(1.1, 3.3)	(0.4, 4.2)
Same-day discharge, n (%)	0 (0.0)	3 (10.3)		0 (0.0)	2 (2.4)