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

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

References Country Type Level of evidence Study quality NOS Scale
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 *** ** ** *******