|Participants||Individuals who are randomly assigned to the interventions being evaluated|
|Healthcare providers||The physicians, nurses, physiotherapists, or other personnel who care for the participants during the study period or those who administer the interventions|
|Data collectors||Individuals who collect data for the study outcomes; data collection could include administering a questionnaire, taking a physical measurement, or eliciting symptoms|
|Judicial assessors of outcomes||The individuals who ultimately decide whether a participant has had the outcome, or outcomes, of interest|
|Data analysts||The individuals who conduct the data analyses|
|Data safety and monitoring committee||The committee that reviews the data to advise on the continuing safety of the trial and persistent uncertainty of the efficacy of the intervention being evaluated|
|Manuscript writers||The individuals who write versions of the manuscript before the breaking of the randomisation code: in a fully blinded study, one version is written with the assumption that group A received the experimental intervention, and the other is written with the assumption that group B received the experimental intervention|
“Double blind, you are the weakest link — goodbye!”
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