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

doi:10.5312/wjo.v14.i12.853

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Dec 18, 2023 (publication date) through Mar 6, 2025

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World Journal of Orthopedics

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Baishideng Publishing Group Inc, 7041 Koll Center Parkway, Suite 160, Pleasanton, CA 94566, USA

Observational Study

World J Orthop. Dec 18, 2023; 14(12): 853-867
Published online Dec 18, 2023. doi: 10.5312/wjo.v14.i12.853

Table 1 Patient demographics

	Total knee replacement (n = 63)	Total hip replacement (n = 68)
Age (yr), mean ± SD	72.1 ± 8.3	68.7 ± 9.4
Gender (male:female)	22:41	27:41
Laterality (left:right:bilateral)	27:34:2	27:41:0
Height (m), mean ± SD	1.62 ± 0.09	1.66 ± 0.10
Weight (kg), mean ± SD	80.2 ± 15.1	82.6 ± 16.7
BMI (kg/m²), mean ± SD	30.4 ± 4.2	30.0 ± 5.5
ASA median (range)	2 (1-3)	2 (1-3)
SCQ median (range)	4 (0-15)	5 (0-18)

BMI: Body mass index; ASA: American Society of Anaesthesiologist Physical Classification System; SCQ: Self-Assessed Co-Morbidity Questionnaire.

Table 2 Comparison of pre-operative and post-operative patient reported outcome measure scores: Total knee replacement

	Pre-operative (n = 63), median (IQR)	Post-operative (n = 63), median (IQR)	P value¹	Z value
KOOS pain	36 (25-44)	92 (77 – 98)	< 0.001^a	-6.617
KOOS symptoms	36 (21-46)	89 (82 – 93)	< 0.001^a	-6.842
KOOS ADL	38 (31-44)	88 (78-97)	< 0.001^a	-6.902
KOOS Sport/Rec	5 (0-25)	70 (50-86)	< 0.001^a	-4.571
KOOS QoL	13 (6-25)	75 (56-93)	< 0.001^a	-6.457
Overall KOOS	28.9 (18.2-37.9)	80.7 (64.5-89.4)	< 0.001^a	-5.160
WOMAC pain	40 (30-50)	90 (80-100)	< 0.001^a	-6.575
WOMAC stiffness	25 (25-37.5)	75 (63-100)	< 0.001^a	-6.708
WOMAC function	38.2 (30.9-44.1)	91.2 (77.9-97.1)	< 0.001^a	-6.625
Oxford knee score	15 (11-19)	40 (33-43)	< 0.001^a	-6.618
EQ-5D index	0.345 (0.211-0.548)	0.821 (0.703-1)	< 0.001^a	-6.237
EQ-5D VAS	65 (50-80)	83 (71-95)	< 0.001^a	-5.323
SF-12 PCS	27.6 (23.2-32.1)	43.8 (33.0-50.4)	< 0.001^a	-5.333
SF-12 MCS	47.0 (39.3-56.5)	58.6 (51.5-61.3)	< 0.001^a	-3.832

¹Wilcoxon Signed Rank test.

^aStatistically significant P < 0.05.

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.

Table 3 Comparison of pre-operative and post-operative patient reported outcome measure scores: Total hip replacement

	Pre-operative (n = 68), median (IQR)	Post-operative (n = 68), median (IQR)	P value¹	Z value
HOOS pain	33 (25-40)	92 (77-98)	< 0.001^a	-4.868
HOOS symptoms	38 (30-49)	89 (82-93)	< 0.001^a	-4.909
HOOS ADL	37 (26-43)	88 (78-97)	< 0.001^a	-4.841
HOOS Sport/Rec	19 (6-31)	70 (50-86)	< 0.001^a	-4.788
HOOS QoL	19 (6-31)	75 (56-93)	< 0.001^a	-4.663
Overall HOOS	28.9 (18.2-37.9)	80.7 (64.5-89.4)	< 0.001^a	-4.681
WOMAC pain	40 (30-49)	95 (85-100)	< 0.001^a	-4.932
WOMAC stiffness	25 (25-50)	88 (75-100)	< 0.001^a	-4.760
WOMAC function	36.8 (28.3-44.1)	91.9 (75.7-98.5)	< 0.001^a	-4.864
Oxford hip score	14 (10-20)	42 (35-47)	< 0.001^a	-4.912
EQ-5D index	0.335 (0.169-0.533)	0.857 (0.643-1)	< 0.001^a	-4.918
EQ-5D VAS	65 (50-80)	90 (79-95)	< 0.001^a	-4.357
SF-12 PCS	24.8 (21.7-29.3)	50.6 (36.5-55.0)	< 0.001^a	-4.623
SF-12 MCS	49.6 (39.9-58.3)	57.8 (55.4-59.8)	0.076	-1.776

¹Wilcoxon Signed Rank test.

^aStatistically significant P < 0.05.

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
KOOS/HOOS pain	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
KOOS/HOOS symptoms	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
KOOS/HOOS ADL	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)	0.030^a	-2.164	1001
KOOS/HOOS Sport/Rec	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
KOOS/HOOS QoL	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
KOOS/HOOS overall	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
WOMAC pain	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
WOMAC stiffness	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
WOMAC function	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
OKS/OHS	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
EQ-5D index	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
EQ-5D VAS	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
SF-12 PCS	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
SF-12 MCS	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.

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
KOOS pain	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
KOOS symptoms	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
KOOS ADL	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
KOOS Sport/Rec	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
KOOS QoL	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
Overall KOOS	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
WOMAC pain	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
WOMAC stiffness	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
WOMAC function	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
Oxford knee score	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
EQ-5D index	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
EQ-5D VAS	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
SF-12 PCS	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
SF-12 MCS	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.

Table 6 Comparison of pre-operative and post-operative total hip replacement patient reported outcome measure scores: Cemented, uncemented and hybrid fixations

		Cemented (n = 36), median (IQR)	Uncemented (n = 28), median (IQR)	Hybrid (n = 4), median (IQR)	P value¹	H value
HOOS pain	Pre-operative	35 (22.4-44.6)	31 (25-38)	40 (33-X)	0.512	1.338
HOOS pain	Post-operative	95 (70-100)	98 (93-100)	89 (83- X)	0.332	2.205
HOOS symptoms	Pre-operative	40 (30-50)	35 (29-45)	35 (15-X)	0.544	1.216
HOOS symptoms	Post-operative	85 (75-90)	95 (85-100)	73 (65-X)	0.046^a	6.614
HOOS ADL	Pre-operative	37 (25-43)	35 (28-44)	40 (35-X)	0.808	0.425
HOOS ADL	Post-operative	91 (68-96)	98 (84-100)	80 (66-X)	0.176	3.479
HOOS Sport/Rec	Pre-operative	16 (5-27)	25 (6-43)	25 (19-X)	0.611	0.986
HOOS Sport/Rec	Post-operative	75 (48-95)	94 (75-100)	59 (50-X)	0.111	4.405
HOOS QoL	Pre-operative	19 (6-31)	19 (13-38)	31 (25-X)	0.401	1.827
HOOS QoL	Post-operative	75 (50-94)	88 (69-100)	56 (50-X)	0.259	2.703
Overall HOOS	Pre-operative	26.1 (19.7-40.0)	29.7 (21.5-40.3)	35.9 (25.3-X)	0.812	0.418
Overall HOOS	Post-operative	88.4 (64.8-92.2)	95.0 (79.0-98.8)	71.4 (65.2-X)	0.130	4.086
WOMAC pain	Pre-operative	45 (25-55)	35 (30-40)	40 (35-X)	0.497	1.398
WOMAC pain	Post-operative	95 (65-100)	95 (90-100)	90 (80-X)	0.764	0.538
WOMAC stiffness	Pre-operative	25 (25-50)	25 (25-38)	25 (25-X)	0.964	0.074
WOMAC stiffness	Post-operative	88 (75-88)	88 (75-100)	69 (63-X)	0.170	3.540
WOMAC function	Pre-operative	39.7 (26.5-50.0)	34.6 (29.0-44.1)	39.7 (35.3-X)	0.790	0.472
WOMAC function	Post-operative	91.2 (67.7-95.6)	98.5 (83.8-100)	80.1 (66.2-X)	0.190	3.317
Oxford hip score	Pre-operative	14 (10-19)	14 (11-22)	19 (17-X)	0.238	2.872
Oxford hip score	Post-operative	41 (33-46)	44 (39-47)	38 (34-X)	0.347	2.118
EQ-5D index	Pre-operative	0.375 (0.155-0.533)	0.314 (0.217-0.535)	0.604 (0.482-X)	0.128	4.106
EQ-5D index	Post-operative	0.836 (0.592-1)	1 (0.747-1)	0.790 (0.580-X)	0.529	1.274
EQ-5D VAS	Pre-operative	65 (50-80)	65 (39-80)	60 (60-X)	0.938	0.127
EQ-5D VAS	Post-operative	90 (70-95)	90 (80-98)	80 (65-X)	0.779	0.499
SF-12 PCS	Pre-operative	25.0 (21.1-27.3)	25.3 (21.9-31.1)	24.7 (20.4-X)	0.597	1.030
SF-12 PCS	Post-operative	50.6 (32.3-54.8)	53.4 (43.3-55.8)	42.9 (36.4-X)	0.447	1.610
SF-12 MCS	Pre-operative	49.5 (41.1-58.2)	50.6 (38.7-58.6)	50.7 (34.4-X)	0.980	0.040
SF-12 MCS	Post-operative	56.6 (53.7-59.8)	59.2 (57.3-60.8)	47.1 (36.1-X)	0.128	4.104

¹Kruskal Wallis H test.

^aStatistically significant P < 0.05.

IQR: Interquartile range; HOOS: Hip 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.

Table 7 Pre-operative and post-operative impact of body mass index category on patient reported outcome measure scores: Total knee replacements

		Normal (n = 8), median (IQR)	Overweight (n = 24), median (IQR)	Obese (n = 31), median (IQR)	P value¹	H value
KOOS pain	Pre-operative	41 (22-51)	38 (26-49)	33 (22-42)	0.230	2.936
KOOS pain	Post-operative	97 (95-100)	92 (73-97)	88 (72-98)	0.046^a	6.160
KOOS symptoms	Pre-operative	32 (23-62)	38 (21-56)	32 (22-43)	0.701	0.712
KOOS symptoms	Post-operative	91 (86-95)	89 (86-93)	86 (79-93)	0.129	4.098
KOOS ADL	Pre-operative	40 (25-53)	38 (34-45)	40 (26-43)	0.466	1.527
KOOS ADL	Post-operative	96 (89-99)	91 (78-97)	87 (76-96)	0.214	3.079
KOOS Sport/Rec	Pre-operative	5 (0-63)	8 (0-25)	5 (0-20)	0.621	0.952
KOOS Sport/Rec	Post-operative	75 (60-100)	73 (51-84)	65 (45-88)	0.582	1.083
KOOS QoL	Pre-operative	19 (0-44)	19 (6-31)	6 (6-19)	0.302	2.394
KOOS QoL	Post-operative	91 (75-99)	75 (63-100)	63 (47-81)	0.032^a	6.881
Overall KOOS	Pre-operative	36.5 (12.1-51.1)	32.2 (20.8-43.8)	26.6 (16.7-33.7)	0.354	2.075
Overall KOOS	Post-operative	87 (80-97)	81.3 (67.2-92.0)	79.9 (64.1-84.8)	0.208	3.139
WOMAC pain	Pre-operative	45 (25-54)	40 (30-50)	35 (25-50)	0.332	2.206
WOMAC pain	Post-operative	100 (95-100)	90 (75-99)	90 (79-100)	0.045^a	6.186
WOMAC stiffness	Pre-operative	38 (6-59)	25 (25-47)	25 (25-38)	0.704	0.702
WOMAC stiffness	Post-operative	100 (75-100)	75 (63-100)	75 (63-88)	0.084	4.960
WOMAC function	Pre-operative	39.7 (25.0-53.3)	38.2 (34.1-45.2)	39.7 (26.5-44.1)	0.521	1.302
WOMAC function	Post-operative	97.1 (93.0-100)	91.2 (78.3-97.1)	86.0 (75.7-97.1)	0.125	4.154
Oxford knee score	Pre-operative	17 (11-23)	15 (11-19)	14 (11-19)	0.566	1.137
Oxford knee score	Post-operative	39 (38-40)	42 (33-45)	39 (33-43)	0.559	1.165
EQ-5D index	Pre-operative	0.502 (0.107-0.630)	0.304 (0.215-0.479)	0.356 (0.206-0.535)	0.606	1.002
EQ-5D index	Post-operative	0.837 (0.821-1)	0.837 (0.735-1)	0.767 (0.633-0.939)	0.260	2.696
EQ-5D VAS	Pre-operative	80 (65-80)	80 (50-90)	60 (50-70)	0.139	3.940
EQ-5D VAS	Post-operative	80 (74-85)	85 (70-95)	85 (70-90)	0.652	0.856
SF-12 PCS	Pre-operative	29.6 (24.8-36.4)	28.2 (23.9-37.8)	27.2 (21.6-29.9)	0.257	2.714
SF-12 PCS	Post-operative	49.0 (44.0-51.7)	46.9 (30.1-53.3)	38.5 (32.5-49.6)	0.379	1.942
SF-12 MCS	Pre-operative	48.2 (38.1-54.6)	50.1 (40.0-59.6)	45.0 (38.6-54.1)	0.692	0.737
SF-12 MCS	Post-operative	58.6 (53.4-60.6)	59.3 (44.2-62.3)	57.8 (51.2-60.5)	0.897	0.208

¹Kruskal Wallis H test.

^aStatistically significant P < 0.05.

KOOS: Knee Osteoarthritis Outcome Score; ADL: Activities of daily livin; 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.

Table 8 Pre-operative and post-operative impact of body mass index category on patient reported outcome measure scores: Total hip replacements

		Normal (n = 14), median (IQR)	Overweight (n = 16), median (IQR)	Obese (n = 34), median (IQR)	Morbidly obese (n = 4), median (IQR)	P value¹	H value
HOOS pain	Pre-operative	38 (23-43)	35 (29-44)	30 (25-39)	22.5 (15-X)	0.405	2.917
HOOS pain	Post-operative	99 (65-100)	99 (86-100)	93 (73-97)	97 (97-97)	0.310	3.582
HOOS symptoms	Pre-operative	40 (28-53)	38 (25-53)	40 (30-49)	35 (25-X)	0.720	1.339
HOOS symptoms	Post-operative	90 (63-100)	98 (69-100)	85 (78-90)	85 (85-85)	0.718	1.349
HOOS ADL	Pre-operative	39 (23-48)	38 (32-42)	33 (27-43)	18 (18-X)	0.277	3.860
HOOS ADL	Post-operative	92 (67-99)	98 (73-100)	84 (63-96)	94 (94-94)	0.294	3.712
HOOS Sport/Rec	Pre-operative	28 (20-31)	25 (19-44)	6 (0-25)	13 (6-X)	0.088	6.536
HOOS Sport/Rec	Post-operative	88 (75-100)	91 (55-100)	63 (34-91)	75 (75-75)	0.252	4.090
HOOS QoL	Pre-operative	25 (6-41)	25 (19-31)	19 (13-25)	13 (0-X)	0.486	2.443
HOOS QoL	Post-operative	88 (58-100)	81 (53-98)	69 (38-90)	94 (94-94)	0.376	3.106
Overall HOOS	Pre-operative	35.9 (29.9-41.7)	36.0 (24.8-38.5)	25.7 (20.7-33.3)	25.0 (12.8-X)	0.267	3.950
Overall HOOS	Post-operative	91.2 (88.8-100)	95.1 (68.3-98.6)	79.0 (60.4-90.0)	89.0 (89.0-89.0)	0.256	4.047
WOMAC pain	Pre-operative	40 (33-63)	38 (31-53)	38 (30-45)	25 (15-X)	0.445	2.673
WOMAC pain	Post-operative	100 (68.8-100)	100 (85-100)	90 (75-98)	95 (95-95)	0.332	3.417
WOMAC stiffness	Pre-operative	38 (19-50)	38 (25-50)	25 (25-38)	25 (13-X)	0.377	3.099
WOMAC stiffness	Post-operative	94 (56-100)	94 (66-100)	75 (75-88)	75 (75-75)	0.483	2.459
WOMAC function	Pre-operative	39.7 (30.1-54.4)	39.7 (32.0-43.8)	33.1 (26.8-44.1)	17.6 (17.6-X)	0.267	3.951
WOMAC function	Post-operative	91.9 (69.1-99.3)	98.5 (73.2-99.6)	83.8 (63.2-95.6)	94.1 (94.1-94.1)	0.313	3.562
Oxford hip score	Pre-operative	23 (12-29)	18 (13-22)	13 (10-19)	7 (5-X)	0.046^a	8.001
Oxford hip score	Post-operative	44 (35-47.75)	44 (36-48)	39 (31-45)	47 (47-47)	0.275	3.882
EQ-5D index	Pre-operative	0.527 (0.059-0.699)	0.481 (0.235-0.568)	0.289 (0.210-0.420)	0.169 (-0.199-X)	0.305	3.624
EQ-5D index	Post-operative	1 (0.659-1)	1 (0.685-1)	0.750 (0.639-0.892)	1 (1-1)	0.158	5.198
EQ-5D VAS	Pre-operative	60 (40-80)	80 (60-85)	65 (40-74)	65 (40-X)	0.250	4.105
EQ-5D VAS	Post-operative	93 (60-100)	94 (71-100)	80 (75-84)	90 (90-90)	0.106	6.114
SF-12 PCS	Pre-operative	31.8 (19.7-37.1)	26.8 (22.5-37.9)	24.1 (21.4-27.6)	25.0 (21.7-X)	0.370	3.144
SF-12 PCS	Post-operative	54.8 (40.5-56.0)	49.3 (36.4-55.3)	43.9 (28.0-54.8)	49.3 (49.3-49.3)	0.590	1.914
SF-12 MCS	Pre-operative	59.5 (51.2-63.1)	53.5 (39.9-61.7)	47.4 (40.1-52.7)	32.3 (16.7-X)	0.075	6.919
SF-12 MCS	Post-operative	57.5 (55.9-59.8	59.8 (55.7-60.8)	57.7 (50.2-59.8)	60.8 (60.8-60.8)	0.334	3.396

¹Kruskal Wallis H test.

^aStatistically significant P < 0.05.

Citation: Green A, Walsh A, Al-Dadah O. Comparison of clinical outcomes between total hip replacement and total knee replacement. World J Orthop 2023; 14(12): 853-867
URL: https://www.wjgnet.com/2218-5836/full/v14/i12/853.htm
DOI: https://dx.doi.org/10.5312/wjo.v14.i12.853