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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