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Table 1 Expectation questionnaire of the subjects between both sessions of the experiment

From: What is the effect of spinal manipulation on the pressure pain threshold in young, asymptomatic subjects? A randomized placebo-controlled trial, with a cross-over design

 Beliefs regarding SM or shamTotal of subjects (n/50)Percentage (%)Are the subjects considered completely blinded? (Yes/No)
ASubjects had same beliefs for SM and sham32/5064%Yes (78%)
BSubjects thought that both interventions were effective and Sham > SM1/502%
CSubjects did not know if SM was effective but thought that the Sham was effective6/5012%
DSubjects thought that both interventions were effective and SM > Sham2/504%No (22%)
ESubjects did not know if the sham was effective but thought that SM was effective3/506%
FSubjects did not know if the SM was effective but thought that the Sham was ineffective3/506%
GSubjects thought that SM was effective and Sham ineffective3/506%
  1. -Sham > SM means stronger certainty for the Sham
  2. -SM > Sham means stronger certainty for the SM
  3. SM spinal manipulation