Review ID | Q1 - Was an ‘a priori’ design provided? | Q2 - Was there duplicate study selection and data extraction? | Q3 - Was a comprehensive literature search performed? | Q4 - Was the status of publication (i.e. grey literature) used as an inclusion criterion? | Q5 - Was a list of studies (included and excluded) provided? | Q6 - Were the characteristics of the included studies provided? | Q7 - Was the scientific quality of the included studies assessed and documented? | Q8 - Was the scientific quality of the included studies used appropriately in formulating conclusions? | Q9 - Were the methods used to combine the findings of studies appropriate? | Q10 - Was the likelihood of publication bias assessed? | Q11 - Was the conflict of interest stated? | Total score |
---|---|---|---|---|---|---|---|---|---|---|---|---|
[25] | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 7 |
[33] | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 6 |
[34] | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 |
[35] | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 10 |
[36] | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 5 |
[30] | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 3 |
[24] | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
[21] | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 4 |
 |  |  |  |  |  |  |  |  |  |  | Mean | 4.875 |