Table A1.

RCT Risk of Bias Table (as per Revised Cochrane Risk-of-Bias Tool for Randomized Trials [RoB 2]).

	Domain 1: Risk of bias arising from the randomization process	Domain 2: Risk of bias due to deviations from the intended interventions	Domain 3: Missing outcome data	Domain 4: Risk of bias in measurement of the outcome	Domain 5: Risk of bias in selection of the reported result	Overall risk of bias
Sathiyakumar et al	Low	Low	Low	Low	Low	Low
Viers et al	Some concerns	Low	Low	Low	Low	Low
Healy et al	Low	Low	Low	Some concerns	Low	Low
Buvik et al	Low	Low	Low	Low	Low	Low
Thompson et al	Low	Low	Low	Some concerns	Low	Low
Augestad et al	Low	Low	Low	Low	Low	Low
Kane et al	Low	Low	Low	Some concerns	Low	Low
Ma et al	Low/some concerns	Low	Some concerns	Some concerns	Low	Low
Cremades et al	Some concerns	Low	Low	Low	Low	Low
Westra and Niessen	Some concerns	Low	Some concerns	Low	Low	Low

Abbreviation: RCT, randomized controlled trial.