From: Results from a blind and a non-blind randomised trial run in parallel: experience from the Estonian Postmenopausal Hormone Therapy (EPHT) Trial
Don't know
Correct guess
Incorrect guess
Don't care
Blind HT
414
300
117
36
N = 867
48%
35%
13%
4%
Blind placebo
375
213
144
33
N = 765
49%
28%
19%