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. 2014 Mar 14;9(3):e91699. doi: 10.1371/journal.pone.0091699

Table 2. Opinions regarding placebo mechanisms, possible use and concerns regarding its use.

In which of the following situations, have you considered placebo? (more then one option allowed)
None of the above 34%
As a diagnostic tool 34%
When all other therapies have been exhausted 26%
As a treatment for a nonspecific symptom 20%
Instead of surgery, when using surgery was not justified 16%
As a supplement to surgery 15%
To calm a patient or to mollify a complaining patient 15%
To control pain 12%
To maintain a good relationship with a patient 9%
What are your concerns regarding the use of placebo in surgery?
(more than one option allowed)
It involves deception 62%
It endangers the patient-surgeon trust 48%
Because of legal problems 43%
Because of possible side effects 34%
It is ineffective 15%
None of the above 2%
Scientific data suggest that some patients benefit from the placebo effect.
In your opinion, what is the mechanism behind this phenomenon?
(more than one option allowed)
Psychological 95%
Unexplained factors 46%
The natural course of the illness 41%
Conditioning 24%
Physiological 23%
Positive energies 7%
Other 3%