Table 2.

Mean values and standard deviation of the number, of the FA values and of the length (mm) of the fiber tracts before and after radical prostatectomy at base, midgland, and apex levels for right and left side, with relative DTI B-A RATIOs and p-value

Number
	Base		Midgland		Apex
right	left	right	left	right	left
Before-RP	152 ± 40	153 ± 42	115 ± 34	120 ± 35	41 ± 17	42 ± 19
After-RP	111 ± 41	113 ± 51	86 ± 30	84 ± 40	25 ± 11	26 ± 13
DTI B-A RATIOs	1.5	1.6	1.5	1.9	1.9	1.7
p-value	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01

Fractional anisotropy (FA)
	Base		Midgland		Apex
right	left	right	left	right	left
Before-RP	0.431 ± 0.060	0.416 ± 0.057	0.450 ± 0.053	0.444 ± 0.063	0.319 ± 0.043	0.324 ± 0.045
After-RP	0.430 ± 0.063	0.417 ± 0.064	0.414 ± 0.052	0.406 ± 0.055	0.315 ± 0.046	0.304 ± 0.041
DTI B-A RATIOs	1.0	1.0	1.1	1.1	1.0	1.1
p-value	0.96	0.96	<0.05	<0.05	0.13	0.74

Length (mm)
	Base		Midgland		Apex
right	left	right	left	right	left
Before-RP	12.3 ± 0.3	12.4 ± 0.03	12.1 ± 2.5	12.2 ± 1.6	13.8 ± 0.8	14.7 ± 0.1
After-RP	12.2 ± 1.6	12.1 ± 1.5	12.1 ± 1.5	11.7 ± 1.2	13.2 ± 2.8	13.4 ± 2.5
DTI B-A RATIOs	1.0	1.0	1.0	1.0	1.1	1.1
p-value	0.82	0.61	0.96	0.28	0.51	0.17

DTI B-A RATIOs, ratio between numbers, FA values and length of the fiber tracts before and after radical prostatectomy; RP, radical prostatectomy.