Evaluation of 1031 primary titanium nitride coated mobile bearing total knee arthroplasties in an orthopedic clinic

Table 1 Comparisons of clinical outcomes 1 year after primary total knee arthroplasty (medians with interquartile ranges)

	Arthroplasty in situ (n = 663)	Revised (n = 8)	P value
KOOS-pain	92 (72; 100)	64 (42; 72)	< 0.01
KOOS-sympt	86 (71; 93)	68 (56; 78)	< 0.01
KOOS-adl	89 (70; 97)	59 (51; 75)	< 0.01
KOOS-sport	40 (15; 70)	33 (6; 65)	0.56
KOOS-qol	69 (50; 88)	38 (38; 55)	< 0.01
VAS-pain (rest)	1 (0; 7)	8 (1; 61)	0.06
VAS-pain (activity)	2 (0; 13)	18 (3; 40)	0.03
VAS-satisfaction	91 (70; 100)	45 (14; 38)	< 0.01
EQ-5D	0.84 (0.78; 1.0)	0.76 (0.35; 0.78)	< 0.01
EQ-5D-VAS	80 (70; 90)	71 (50; 89)	0.26

KOOS: Knee injury and osteoarthritis outcome score; VAS: Visual analogue scale.

Table 2 Implant component sizing (n = 1031)

Component size femur	n (%)	Component size tibia	n (%)	Size liner	n (%)
2	5 (0.5)	3	57 (5.6)	10	545 (53)
3	257 (25.0)	4	386 (37.6)	12.5	394 (38.2)
4	390 (37.9)	5	287 (27.9)	15	80 (7.8)
5	280 (27.2)	6	221 (21.5)	17.5	8 (0.8)
6	97 (7.4)	7	76 (7.4)	20	2 (0.2)
Missing	2	Missing	4	Missing	2