Methodological item for non-randomized studies | Uemoto et al. [34] | Liu et al. [35] | Li et al. [28] | Yu et al. [36] | Fan et al. [37] | Wei et al. [38] |
---|---|---|---|---|---|---|
1. A clearly stated aim | 2 | 2 | 2 | 2 | 2 | 2 |
2. Inclusion of consecutive patients | 2 | 2 | 2 | 2 | 2 | 2 |
3. Prospective collection of data | 0 | 0 | 0 | 0 | 0 | 0 |
4. Endpoints appropriate to the aim of the study | 2 | 2 | 2 | 2 | 2 | 2 |
5. Unbiased assessment of the study endpoint | 0 | 0 | 0 | 0 | 0 | 0 |
6. Follow-up period appropriate to the aim of the study | 2 | 0 | 2 | 2 | 0 | 0 |
7. Loss to follow up less than 5Â % | 2 | 0 | 0 | 2 | 0 | 1 |
8. Prospective calculation of the study size | 0 | 0 | 1 | 0 | 0 | 1 |
9. An adequate control group | 2 | 2 | 2 | 2 | 2 | 2 |
10. Contemporary groups | 2 | 2 | 2 | 2 | 2 | 2 |
11. Baseline equivalence of groups | 2 | 2 | 2 | 2 | 1 | 2 |
12. Adequate statistical analyses | 2 | 2 | 2 | 2 | 2 | 2 |
Total score | 18 | 14 | 17 | 18 | 13 | 16 |