From: Cross-linked versus conventional polyethylene for total knee arthroplasty: a meta-analysis
Quality assessment for non-randomized trials | Hodrick et al. 2008 [3] | Minoda et al. 2009 [21] | Meneghini et al. 2015 [20] |
---|---|---|---|
A clearly stated aim | 2 | 2 | 2 |
Inclusion of consecutive patients | 2 | 2 | 2 |
Prospective data collection | 1 | 1 | 2 |
Endpoints appropriate to the aim of the study | 1 | 1 | 1 |
Unbiased assessment of the study endpoint | 1 | 1 | 1 |
A follow-up period appropriate to the aims of study | 2 | 2 | 2 |
Less than 5 % loss to follow-up | 0 | 2 | 0 |
Prospective calculation of the sample size | 0 | 0 | 0 |
An adequate control group | 2 | 2 | 2 |
Contemporary groups | 1 | 1 | 1 |
Baseline equivalence of groups | 2 | 2 | 2 |
Adequate statistical analyses | 2 | 2 | 2 |
Total score | 16 | 18 | 17 |