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

Table 4 Comparison of pre-operative and post-operative patient reported outcome measure scores: Total knee replacement vs total hip replacement

		TKR (n = 63), median (IQR)	THR (n = 68), median (IQR)	P value1	Z value	U value
KOOS/HOOS pain	Pre-operative	36 (25-44)	33 (25-40)	0.597	-0.528	1755
	Post-operative	92 (77-98)	95 (84-100)	0.208	-0.370	1206
KOOS/HOOS symptoms	Pre-operative	36 (21-46)	38 (30-49)	0.415	-0.415	1729
	Post-operative	89 (82-93)	90 (80-100)	0.629	-0.483	1189
KOOS/HOOS ADL	Pre-operative	38 (31-44)	37 (26-43)	0.298	-1.040	1656
	Post-operative	88 (78-97)	91 (76-98)	0.711	-0.370	1206
KOOS/HOOS Sport/Rec	Pre-operative	5 (0-25)	19 (6-31)	0.030a	-2.164	1001
	Post-operative	70 (50-86)	75 (56-100)	0.158	-0.141	738
KOOS/HOOS QoL	Pre-operative	13 (6-25)	19 (6-31)	0.106	-1.616	1519
	Post-operative	75 (56-93)	84 (58-94)	0.499	-0.676	1030
KOOS/HOOS overall	Pre-operative	28.9 (18.2-37.9)	28.0 (21.0-37.6)	0.833	-0.211	1267
	Post-operative	80.7 (64.5-89.4)	88.8 (72.9-95.5)	0.140	-1.476	713
WOMAC pain	Pre-operative	40 (30-50)	40 (30-49)	0.984	-0.02	1886
	Post-operative	90 (80-100)	95 (85-100)	0.297	-1.04	1020
WOMAC stiffness	Pre-operative	25 (25-37.5)	25 (25-50)	0.583	-0.55	1786
	Post-operative	75 (63-100)	88 (75-100)	0.309	-1.02	1114
WOMAC function	Pre-operative	38.2 (30.9-44.1)	36.8 (28.3-44.1)	0.639	-0.47	1798
	Post-operative	91.2 (77.9-97.1)	91.9 (75.7-98.5)	0.945	-0.07	1151
OKS/OHS	Pre-operative	15 (11-19)	14 (10-20)	0.859	-0.177	1826
	Post-operative	40 (33-43)	42 (35-47)	0.076	-1.775	932
EQ-5D index	Pre-operative	0.345 (0.211-0.548)	0.335 (0.169-0.533)	0.719	-0.36	1761
	Post-operative	0.821 (0.703-1)	0.857 (0.643-1)	0.386	-0.87	988
EQ-5D VAS	Pre-operative	65 (50-80)	65 (50-80)	0.308	-1.02	1579
	Post-operative	83 (71-95)	90 (79-95)	0.374	-0.89	1019
SF-12 PCS	Pre-operative	27.6 (23.2-32.1)	24.8 (21.7-29.3)	0.073	-1.79	1308
	Post-operative	43.8 (33.0-50.4)	50.6 (36.5-55.0)	0.106	-1.62	690
SF-12 MCS	Pre-operative	47.0 (39.3-56.5)	49.6 (39.9-58.3)	0.777	-0.28	1574
	Post-operative	58.6 (51.5-61.3)	57.8 (55.4-59.8)	0.438	-0.78	784

¹Mann-Whitney U test.

^aStatistically significant P < 0.05.

IQR: Interquartile range; TKR: Total knee replacement; THR: Total hip replacement; KOOS: Knee Osteoarthritis Outcome Score; HOOS: Hip Osteoarthritis Outcome Score; ADL: Activities of daily living; Sport/Rec: Sports and recreation; QoL: Quality of life; OKS: Oxford Knee Score; OHS: Oxford Hip Score; 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.