[spintreebob]

Was there a control group that received the same level of attention? Or was there a Hawthorne effect involved?

When a study is being performed, the people in the study receive more attention than normal. People love attention. Attention has a positive impact on the health of most people.

So there needs to be an equal amount of attention to the control group that receives the same attention with those giving attention blind to the fact that they are giving placebo.

[ConservativeMind]

I think your concern around attention is misguided, because they were all in ICUs.

However, this shows that even the doctors didn't know. From the study:

“In this phase 3, multicenter, double-blind, randomized, controlled trial,…”