Comparison of clinical outcomes between total hip replacement and total knee replacement

Table 5 Comparison of pre-operative and post-operative total knee replacement patient reported outcome measure scores: Cruciate retaining vs posterior stabilised implants

		Cruciate retaining (n = 36), median (IQR)	Posterior stabilised (n = 27), median (IQR)	P value1	Z value	U value
KOOS pain	Pre-operative	36 (23-44)	36 (25-42)	0.568	-0.57	445.0
	Post-operative	89 (69-100)	94 (83-97)	0.271	-1.10	348.5
KOOS symptoms	Pre-operative	36 (26-53)	32 (21-43)	0.181	-1.34	390.0
	Post-operative	86 (80-89)	89 (86-93)	0.074	-1.79	358.5
KOOS ADL	Pre-operative	39 (31-46)	38 (29-44)	0.950	-0.06	481.5
	Post-operative	88 (75-96)	94 (82-97)	0.292	-1.05	410.5
KOOS Sport/Rec	Pre-operative	5 (0-29)	5 (0-25)	0.721	-0.36	277.0
	Post-operative	70 (50-85)	70 (60-95)	0.671	-0.43	237.5
KOOS QoL	Pre-operative	6 (2-25)	13 (6-27)	0.408	-0.83	411.0
	Post-operative	75 (56-81)	75 (61-94)	0.557	-0.59	354.5
Overall KOOS	Pre-operative	29. 8 (20.8-36.5)	27.2 (16.8-38.5)	0.880	-0.15	286.5
	Post-operative	81.3 (64.0-88.8)	80.7 (75.3-90.8)	0.730	-0.35	232.0
WOMAC pain	Pre-operative	40 (30-50)	35 (30-50)	0.867	-0.17	474.0
	Post-operative	90 (75-100)	95 (85-100)	0.376	-0.88	363.0
WOMAC stiffness	Pre-operative	25 (25-47)	25 (25-38)	0.930	-0.09	480.0
	Post-operative	75 (63-88)	75 (75-100)	0.112	-1.59	374.5
WOMAC function	Pre-operative	39.0 (30.9-45.2)	38.2 (29.4-44.1)	0.851	-0.19	472.5
	Post-operative	88.2 (73.5-97.1)	94.1 (82.4-97.0)	0.286	-1.07	350.5
Oxford knee score	Pre-operative	14 (11-21)	15 (12-18)	0.760	-0.31	451.0
	Post-operative	41 (33-43)	40 (34-44)	0.794	-0.26	408.0
EQ-5D index	Pre-operative	0.322 (0.217-0.530)	0.392 (0.181-0.568)	0.747	-0.32	428.0
	Post-operative	0.795 (0.679-1)	0.829 (0.714-1)	0.885	-0.15	368.5
EQ-5D VAS	Pre-operative	65 (50-80)	80 (53-83)	0.180	-1.34	348.5
	Post-operative	85 (79-95)	80 (70-86)	0.151	-1.44	346.5
SF-12 PCS	Pre-operative	28.1 (23.2-31.6)	25.7 (23.4-32.5)	0.653	-0.45	379.5
	Post-operative	43.8 (34.9-52.2)	44.6 (28.3-50.9)	0.572	-0.57	248.5
SF-12 MCS	Pre-operative	44.0 (38.7-53.9)	49.7 (41.6-57.1)	0.294	-1.05	341.5
	Post-operative	57.5 (49.9-60.6)	59.4 (51.4-61.6)	0.306	-1.02	227.0

¹Mann-Whitney U test.

IQR: Interquartile range; KOOS: Knee Osteoarthritis Outcome Score; ADL: Activities of daily living; Sport/Rec: Sports and recreation; QoL: Quality of life; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; EQ-5D: EuroQol-5D index; VAS: Visual Analogue Scale; SF-12: Short Form 12 item survey; PCS: Physical component summary; MCS: Mental component summary.