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

Table 1 Comparison of fraction of contrast delivered to prostate tissue

Device vs needle	Fraction in tissue (mean with SE)	N	p-value
Device 1cm length of porous segment	0.27 ± 0.12 (0.24 ± 0.14)	7 (8)	0.013 (0.05)
Device 2 cm length of porous segment	0.33 ± 0.24	5	0.035
Needle	0.10 ± 0.11	8	0.010 (0.02)

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