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Table 2 Methodological quality of the non-randomized controlled trials

From: Comparison of local infiltration analgesia and sciatic nerve block for pain control after total knee arthroplasty: a systematic review and meta-analysis

Quality assessment for non-randomized trials Cip 2016 [15] Aikawa 2016 [16]
A clearly stated aim 2 2
Inclusion of consecutive patients 2 2
Prospective data collection 2 2
Endpoints appropriate to the aim of the study 2 2
Unbiased assessment of the study endpoint 0 0
A follow-up period appropriate to the aims of study 2 2
Less than 5% loss to follow-up 2 2
Prospective calculation of the sample size 0 2
An adequate control group 2 2
Contemporary groups 0 1
Baseline equivalence of groups 2 2
Adequate statistical analyses 2 2
Total score 18 21