Change of Safe Needling Depth at Acupoint GB21 according to Posture and Breathing

Figure 3

Boxplot graph of the depth at GB21. The depth at GB21 was greater in men than in women, and the depth of the pleural membrane was greater in the prone positions (PPA and PPB) than in the sitting position (StP). The gray square indicates the mean value. One-way analysis of variance was used for statistical analysis and Tukey’s HSD was used for post hoc analysis. < 0.05, < 0.01.