Table 4.

Mean difference, standard deviation, upper and lower limits of agreement of the repeated DTI measurements assessed by both observers via Bland–Altman analysis for number, FA and length of fiber tracts before and after prostatectomy

	Number before	Number after	FA before	FA after	Length before	Length after
Mean difference	1.1	0.5	−0.001	−0.001	0.1	0.0
Standard deviation	6.6	7.5	0.002	0.006	0.5	0.5
Lower limits	−11.9	−14.1	−0.006	−0.013	−0.8	−1.0
Upper limits	14.2	15.2	0.004	0.011	1.0	1.1
Mean difference	2.2	0.9	0.000	−0.004	0.1	0.0
Standard deviation	6.9	6.4	0.002	0.007	0.5	0.5
Lower limits	−11.3	−11.7	−0.003	−0.017	−0.9	−0.9
Upper limits	15.7	13.5	0.004	0.010	1.0	0.8

DTI, diffusion tensor imaging; FA, fractional anisotropy.