Table 2.

Assessment of risk of bias of RCT included in systematic review

Cochrane risk of bias tool domains*	Review authors’ judgement	Support for review authors’ judgement
Sequence generation	Unclear	Authors reported that leaders were stratified based on gender, geographical location and type of group, and block randomised by a statistician. They did not provide information on how the randomisation sequence was generated.
Allocation concealment	Unclear	No information provided on allocation concealment method.
Blinding of participants, personnel and outcome assessors	High	Blinding of participants and personnel was not possible due to nature of the intervention. Outcomes were self-reported by participants, who were not blinded.
Incomplete outcome data	Unclear	Approximately 20% missing data in both trial arms and not included in final analyses.
Selective outcome reporting	Low	Authors reported small, non-significant effect sizes for included outcomes. In addition, although not a prespecified outcome of the systematic review, they reported emotional distress, which was higher (non-significant) in the high-resource arm.
Other bias	Low	None

*See online supplementary file 3 for domain descriptions. Domains are scored as ‘high’, ‘low’ or ‘uncertain’ risk of bias. Risk of bias ratings were based only on published information.

RCT, randomised controlled trial.