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this post was submitted on 23 Jun 2023
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Thanks for that.
Lack of blinding is a serious issue for subjective outcomes but blinding when treatment effects are obvious to both intervention and control groups is dishonest (Pharma does it all the time to make their trials look more credible than they are).
Open label is the norm for cancer trials for exactly this reason. It is important to consider the biases that may arise, in subjective endpoints especially. But it is ludicrous to dismiss research on this basis alone. We can't randomise 12 year olds to become lifetime smokers or not, let alone use placebo controls, but we do know that smoking kills. It's just a bit more complicated to prove it when perfectly designed RCTs are not possible.