Table 1.

Summary of clinical outcomes and survivorship in studies comparing UKA and TKA

S. no.	Author	Year	Type of study	Age, mean (years)		Number of patients		Follow-up, mean (years)		Prosthesis implanted		Functional scores, mean		Range of motion, mean (°)		Survivorship (%)
				UKA	TKA	UKA	TKA	UKA	TKA	UKA	TKA	UKA	TKA	UKA	TKA	UKA	TKA
1	Siman et al. [28]	2017	Retrospective	80.1	79.6	120	188	3.5	4.6	Multiple	Multiple	KSS (F) 85.4	84	119.3	111.3	98.3	98.8
2	Lum et al. [29]	2016	Retrospective	63.3	65.7	201	189	5.4	5.5	Oxford	Vanguard Zimmer	KSS (K/F)78/77.6	66/66	118.7	111.6	98.5	96.8
3	Horikawa et al. [30]	2015	Retrospective	74	72.2	28	50	9	10.5	Stryker EIUS	Stryker Scorpio NRG	JOA 80.2	81.1	142.5	126	84	92
4	Bolognesi et al. [31]	2013	Retrospective	74.2	74.6	2844	64,932	—	—	—	—	—	—	—	—	82	96.3
5	Lyons et al. [32]	2011	Retrospective	66.02	67.65	279	5606	7.12	6.5	Multiple	Multiple	KSS (K/F) 79.55/65.74	90.58/89.72	—	—	90	95
6	Costa et al. [33]	2011	Prospective	73	73	34	34	5	5	EIUS Zimmer	Stryker Scorpio NRG	KSS (K/F) 96/91	96/91	—	—	85	100
7	Sun et al. [34]	2010	Prospective	60	61	28	28	~ 4	~ 4	Oxford	AGC Biomet	KSS (F) 80.5	78.9	117	115	75	100
8	Newman et al. [35]	2009	Prospective	69.6	69.8	52	50	15	15	St. Georg Sled	Kinematic modular	BKS 92	87.5	—	—	89.8	78.7
9	Amin et al. [36]	2006	Prospective	68.1	69.3	54	54	~ 5	~ 5	—	—	KSS (K/F) 82/85	84/84	102	105	85	98
10	Ackroyd et al. [37]	2002	Prospective	70	72	408	531	6.4	5.7	St. Georg Sled	Kinematic modular	BKS (> 80 points) 77.9%	75.1%	109.3	99.9	87.5	89.6
11	Weale et al. [9]	1998	Prospective	69.6	69.8	50	52	5	5	St. Georg Sled	Kinematic modular	—	—	117.3	108	96	98

JOA Japanese Orthopedic Association, BKS Bristol Knee Scoring, KSS (K/F) Knee Society score (Knee score/Function score)