Fig. 8From: Comparison of the placebo effect between different non-penetrating acupuncture devices and real acupuncture in healthy subjects: a randomized clinical trialDuration of needling sensation (in seconds). Values reported by volunteers in the reassesment phase in all groups surveyed. The values are presented as mean ± standard deviation. Kruskal Wallis test (p <0.002) for inter-group analysis, adjusted by Dunn’s test (* p <0.002)Back to article page