question archive The defining features of an RCT In some types of RCT, such as drug trials, both doctor and patient may be 'blind', i
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The defining features of an RCT In some types of RCT, such as drug trials, both doctor and patient may be 'blind', i.e. unaware of whether the patient is a member of a treatment group or of the control group - such a trial is known as 'double blind'.