Table 6.

Example items from the risk of bias tool.

Domain	Example items	Total items
Detection	Were participants blind to the outcome assessment?	1
Attrition	Did the data sufficiently support the findings?	2
Reporting	Have ethical issues been considered?	6
Selection	Was the recruitment strategy appropriate to the aims of the research?	4
Performance	Were participants blind to the intervention rationale?	3
Other	What was the length of follow-up in months?	3