Systematic review | I1 | I2 | I3 | I4 | I5 | I6 | I7 | I8 | I9 | I10 | I11 | AMSTAR Total score |
|---|
Podda 2016 [15] | n | ? | y | y | n | y | n | n | n | y | y | 5 |
Markar 2014 [14] | n | ? | ? | y | n | y | n | n | n | y | y | 4 |
Maggiori 2012 [10] | n | ? | n | y | n | y | y | y | n | n | y | 5 |
Zhou 2012 [11] | n | ? | ? | n | y | y | y | n | n | y | y | 5 |
Li 2012 [12] | n | ? | n | n | n | y | n | n | y | y | n | 3 |
Yang 2012 [13] | n | ? | ? | n | n | y | n | n | n | y | n | 2 |
- y: yes, the criteria are met; n: no, the criteria are not met; ?: can’t answer
- I1: Was an ‘a priori’ design provided?
- I2: Was there duplicate study selection and data extraction?
- I3: Was a comprehensive literature search performed?
- I4: Was the status of publication (i.e. grey literature) used as an inclusion criterion?
- I5: Was a list of studies (included and excluded) provided?
- I6: Were the characteristics of the included studies provided?
- I7: Was the scientific quality of the included studies assessed and documented?
- I8: Was the scientific quality of the included studies used appropriately in formulating conclusions?
- I9: Were the methods used to combine the findings of studies appropriate?
- I10: Was the likelihood of publication bias assessed?
- I11: Was the conflict of interest included?
