Comparison of computer-assisted navigated technology and conventional technology in unicompartmental knee arthroplasty: a meta-analysis

Table 3 Description of the quality of included non-RCTs studies

References	Country	Type	Level of evidence	Study quality	NOS Scale
References	Country	Type	Level of evidence	Downs and Black Score	Selection	Comparability	Expose	Outcome	Total score
Song et al. [21]	Korea	Cohort study	III	16	***	**	–	**	*******
Manzotti et al. [12]	Italy	Case–control study	II	21	***	**	**	–	*******
Valenzuela et al. [37]	USA	Case–control study	II	17	***	**	*	–	******
Weber et al. [17]	Austria	Case–control study	II	23	**	*	**	–	******
Konyves et al. [20]	Australia	Case–control study	II	19	***	**	**	–	*******
Jung et al. [13]	Korea	Cohort study	III	20	***	**	–	**	*******
Rosenberger et al. [10]	Austria	Case–control study	II	16	***	**	**	–	*******
Jenny et al. [33]	South-Korea	Case–control study	II	16	**	**	**	–	******
Keene et al. [34]	France	Cohort study	III	17	***	*	–	**	******
Perlick et al. [36]	Australia	Cohort study	II	18	***	**	–	*	******
Cossey and Spriggins [32]	Denmark	Cohort study	II	19	***	*	–	**	******
Jenny and Boeri [15]	UK	Case–control study	III	18	***	**	**	–	*******

ISSN: 1749-799X