A pilot study in intraparenchymal therapy delivery in the prostate: a comparison of delivery with a porous needle vs standard needle

Table 2 Comparison of ratio of Volume of distribution to Volume infused

Device vs needle	Vd/Vi	N	p-value
Device 1cm length of porous segment	1.32 ± 0.67 (1.17 ± 0.74)	7 (8)	0.211 (0.365)
Device 2 cm length of porous segment	1.46 ± 0.84	5	0.194
Needle	0.81 ± 0.81	7	0.116 (0.192)

The numbers in parentheses use an infusion not included in calculating the other entry in the same element of the table (see text for further explanation). The p-values are two-sided, corresponding to the conservative assumption that there is no a priori reason to favor the porous device. The entry for the p-values compares the device in the row to the standard needle: the third row is a comparison where both porous devices are aggregated in the comparison

ISSN: 1471-2490