Table 4.

The correlation among needle size, angle of puncture, and size of coring.

Angle of puncture	Needle size	Coring; width (mm) Mean ± SD	Coring; length (mm) Mean ± SD
45°	18G (1.2 mm × 25 mm)	0.049 ± 0.020	0.080 ± 0.039
	20G (0.9 mm × 25 mm)	0.051 ± 0.011	0.082 ± 0.036
	21G (0.8 mm × 25 mm)	0	0
	P-value	0.90	0.95
90°	18G (1.2 mm × 25 mm)	0.044 ± 0.022	0.051 ± 0.018
	20G (0.9 mm × 25 mm)	0.028 ± 0.044	0.040 ± 0.088
	21G (0.8 mm × 25 mm)	0.042 +/- 0.031	0.055 ± 0.030
	P-value	0.73	0.65