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Table 2 Questionnaire about beliefs in the effectiveness of the interventions in an RCT on spinal manipulation

From: The effect of a single spinal manipulation on cardiovascular autonomic activity and the relationship to pressure pain threshold: a randomized, cross-over, sham-controlled trial

ASubjects had same beliefs for SM and sham29/4171%
BSubject thought that both interventions were effective and sham > SM1/412%
CSubjects thought that both interventions were effective and SM > sham2/415%
DSubjects did not know if SM was effective but thought that the sham was effective3/417%
ESubjects did not know if the sham was effective but thought that the SM was effective2/415%
FSubjects did not know if the SM was effective but thought that the sham was ineffective2/415%
GSubjects thought that SM was effective and sham was ineffective2/415%
  1. Notes
  2. - A: 24/29 subjects thought with the same certainty that both interventions were effective and 5/29 “did not know”
  3. - sham > SM means stronger certainty for the sham
  4. - SM > sham means stronger certainty for the SM
  5. Abbreviation:
  6. SM spinal manipulation (HVLA technique)