StudyType of StudySequence GenerationAllocation ConcealmentBlinding of Assessors, PatientsIncomplete Outcome Data AddressedFree of Selective ReportingFree of Other BiasOverall
Ginzler14RCTYesYesNoYesYesYesLow risk of bias
Chan16RCTYesUnclearNoYesYesYesModerate risk of bias
Ong18RCTYesYesNoYesYesYesLow risk of bias
Appel17RCTYesYesNoYesYesYesLow risk of bias
  • RCT: randomized controlled trial.