Table 2.

Risk of bias critical assessment—meta‐analyses

Bias domain	Study and ratings
	Gay et al26	Kelly et al32
A priori design	No	Yes
Duplicate study selection/data extraction	Yes, for study selection; unclear for data extraction	Yes
Comprehensive literature search	Yes	Yes
Status of publication used as an inclusion criterion	No	Yes
List of studies (included and excluded) provided	No	Yes
Characteristics of included studies provided	Yes	Yes
Quality of studies assessed and documented	Yes	Yes
Quality of included studies used appropriately in formulating conclusions	Yes	Yes
Methods to combine findings appropriate	Yes	Yes
Publication bias assessed	Yes	No
Conflict of interest stated	Yes, the authors declared no disclosure.	Yes