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

Table 2

Depth at GB21 according to subject positions and sex.

	Pleural membrane (Lung)
	Total	Male	Female	value
	()	()	()	(male versus female)
PPB				0.000
PPA				0.000
StP				0.000
-value	4.079	2.192	4.797	—

StP: sitting position; PPA: prone position A; PPB: prone position B; data are represented as the mean ± SD (mm); (1) statistical significance was tested using -tests between male and female subjects. ,  ; (2) statistical significance was tested using one-way analysis of variance among the position groups.