3.3. Effect of Blinding
For all 298 patients randomized to a group other than the no-treatment group, there was no significant association of practitioner guess with the randomization group (However, in 197 patients who were randomized to either skin-touch or penetrating acupuncture, and who did not report feeling no sensation at all, there was neither a significant association between practitioner guess and the randomization group (The median (mean ± standard deviation) scores of patients and practitioners confidence in their correct guesses were 66.9 (63.7 ± 27.3) and 54.3 (46.7 ± 24.9), respectively. Three patients correctly identified their treatment with certainty. There was no significant difference in the practitioners’ (