Table 1.

Puncture Max-distance (mm)

	L1	L2	L3	L4	L5
Left	22.07 ± 2.79	23.39 ± 2.77	25.79 ± 3.14	26.66 ± 3.31	29.93 ± 3.96
Right	21.85 ± 2.62	23.30 ± 2.95	25.18 ± 2.87*	26.06 ± 2.82*	29.96 ± 4.08
Female	20.88 ± 2.16	22.02 ± 2.35	24.42 ± 2.50	27.22 ± 3.16	29.75 ± 4017
Male	23.04 ± 2.77**	24.67 ± 2.70**	26.55 ± 3.12**	25.50 ± 2.77**	30.14 ± 3.86**
Mean	21.96 ± 2.70	23.35 ± 2.86	25.48 ± 3.02	26.36 ± 3.09	29.94 ± 4.02

*Compared with the left,side P < 0.05; ** Compared with females, P < 0.001