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Study
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Random sequence generation
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Allocation concealment
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Blinding of participants, researchers
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Blinding of outcome assessment
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Incomplete outcome data2
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Selective reporting
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|---|
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Barnato et al., 2017 [29]
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Low
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Low
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High
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Low
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High
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Low
|
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Kentish-Barnes et al., 2017 [28]
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Low
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Low
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High
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Low
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High
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Low
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Tawil et al., 2014 [30]
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Low
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Low
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High
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Unclear
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High
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Low
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- 1Determined by the Cochrane Risk of Bias Assessment Tool
- 2Overall attrition above 20% represents high risk of attrition bias; attrition below 20% and unequal between intervention and control group represents high risk of attrition bias; ratings of unclear represent that either overall attrition or attrition between groups was not reported
