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Table 4 Risk of bias for non-randomized studies according to the MINORS tool (20)

From: The effectiveness of the early orthodontic correction of functional unilateral posterior crossbite in the mixed dentition period: a systematic review and meta-analysis

References

1. A clearly stated aim

2. Inclusion of consecutive patients

3. Prospective collection of data

4. Endpoints appropriate to the aim of the study

5. Unbiased assessment of the study endpoint

6. Follow-up period appropriate to the aim of the study

7. Loss to follow up less than 5%

8. Prospective calculation of the study size

9. An adequate control group

10. Contemporary groups

11. Baseline equivalence of groups

12. Adequate statistical analyses

Total

Boysen et al. [39]

2

1

2

2

0

2

0

0

2

2

2

2

17/24

Brin et al. [40]

2

2

2

2

0

2

1

0

1

1

2

2

17/24

Bjerklin et al. [41]

2

2

1

2

0

2

2

0

2

2

2

2

19/24