MINORS score | Patel et al. (2011) | Grisar et al. (2018) | A.B Hewitt et al. (2011) | Grisar et al. (2020) | Huth et al. (2013) |
A clearly stated aim | 2 | 2 | 2 | 2 | 2 |
Inclusion of consecutive patients | 2 | 2 | 2 | 2 | 2 |
Prospective data collection | 0 | 0 | 0 | 2 | 0 |
End points appropriate to the aim of the study | 1 | 1 | 1 | 2 | 1 |
Unbiased assessment of the study end point | 1 | 1 | 1 | 1 | 1 |
Follow-up period appropriate to the aim of the study | 2 | 2 | 2 | 1 | 1 |
Loss of follow-up lower than 5% | 1 | 1 | 1 | 2 | 2 |
Prospective calculation of the study size | 1 | 1 | 2 | 1 | 1 |
Adequate control group | 2 | 2 | 2 | 2 | 2 |
Contemporary groups | 0 | 0 | 0 | 0 | 0 |
Baseline equivalence of groups | 0 | 0 | 0 | 0 | 0 |
Adequate statistical analyses | 2 | 2 | 2 | 2 | 2 |
Total score | 14 | 14 | 15 | 17 | 14 |
Risk of bias | Medium | Medium | Medium | Medium | Medium |