Impact of time between meniscal injury and isolated meniscus repair on post-operative outcomes: A systematic review

Table 1 The methodological index for non-randomized studies

Quality assessment criteria	Eggli et al[11], 1995	Lucas et al[13], 2015	Hupperich et al[14], 2018	Hagmeijer et al[12], 2019	Moon et al[15], 2020
Clearly stated aim	2	2	2	2	2
Inclusion of consecutive patients	1	2	1	2	2
Prospective collection of data	0	0	2	0	2
Endpoints appropriate to the aim of the study	2	2	2	2	2
Unbiased assessment of study endpoint	0	0	0	0	2
Follow-up period appropriate to the aim of the study	2	2	2	2	2
Loss to follow up less than 5%	2	2	2	0	2
Prospective calculation of study size	0	0	0	0	2
Adequate control group	0	0	0	0	0
Contemporary groups	0	0	0	0	0
Baseline equivalence of groups	0	0	0	0	0
Adequate statistical analysis	1	1	1	1	2
Total score	10	11	12	9	18