TableĀ 1

Risk of bias as assessed using the Cochrane risk of bias tool

StudyRandom sequence generationAllocation concealmentBlinding of participants and personnel (performance bias)Blinding of outcome assessment (detection bias)Incomplete outcome date (attrition bias)
Anaya et al49Unclear riskUnclear riskLow riskUnclear riskLow risk
Coates et al59Low riskHigh riskLow riskUnclear riskLow risk
Lugada et al51Low riskUnclear riskLow riskUnclear riskLow risk
Malonza et al50Low riskUnclear riskLow riskUnclear riskLow risk
Read et al58Low riskHigh riskHigh riskUnclear riskLow risk
Spielberg et al52Low riskHigh riskLow riskUnclear riskLow risk
Sweat et al20Low riskHigh riskLow riskUnclear riskLow risk
Walensky et al48Low riskUnclear riskLow riskUnclear riskLow risk