Differential dropout and bias in randomised controlled trials: when it matters and when it may not
Differential dropout and bias in randomised controlled trials: when it matters and when it may not
Dropout in randomised controlled trials is common and threatens the validity of results, as completers may differ from people who drop out. Differing dropout rates between treatment arms is sometimes called differential dropout or attrition. Although differential dropout can bias results, it does not always do so. Similarly, equal dropout …