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Table 5 Double-blind index

From: Change in the P300 index – a pilot randomized controlled trial of low-frequency electrical stimulation of acupuncture points in middle-aged men and women

 

Real (n(%))

Sham (n(%))

Unknown (n(%))

Total (n(%))

p-value

Real

11 (20.00%)

4 (7.27%)

13 (23.64%)

28 (50.91%)

0.68

Sham

12 (21.82%)

7 (12.73%)

8 (14.54%)

27 (49.09%)

Total

23()

11()

21()

55()

 
  1. The chi-square test results indicate that the blinding was well-maintained, with a p-value of 0.68
  2. Bold data: No placebo effect (p > 0.05)