Table 2.

The results of the post-hoc Wilcoxon-Mann–Whitney test (p-values) comparing the different Pfirrmann grades for each Nucleus pulposus (NP) region-of-interest (ROI) assessed with (a) T1, (b) T2, and (c) T2* mapping. P-values < 0.05 are highlighted in bold.

			I/II	II/III	III/ IV	I/III	I/IV	II/IV
(a)	T1 values	ROI B	0.8106	< 0.0001	0.7778	0.0002	0.0018	< 0.0001
		ROI 2	0.6788	< 0.0001	0.4613	< 0.0001	0.0005	< 0.0001
		ROI 3	0.3938	< 0.0001	0.8214	< 0.0001	0.0005	< 0.0001
		ROI 4	0.5268	< 0.0001	0.6925	0.0005	0.0002	< 0.0001
(b)	T2 values	ROI B	0.0016	< 0.0001	0.0001	0.7043	0.0003	< 0.0001
		ROI 2	0.0339	0.0039	0.0013	0.8889	0.0026	0.0002
		ROI 3	< 0.0001	0.0003	0.0007	0.4837	0.0003	< 0.0001
		ROI 4	0.0006	< 0.0001	0.0001	0.0317	< 0.0001	< 0.0001
(c)	T2* values	ROI B	0.0092	0.0003	< 0.0001	0.2355	< 0.0001	< 0.0001
		ROI 2	0.038	0.0001	< 0.0001	0.2693	< 0.0001	< 0.0001
		ROI 3	0.0069	0.0007	< 0.0001	0.1642	< 0.0001	< 0.0001
		ROI 4	0.0655	< 0.0001	< 0.0001	0.0435	< 0.0001	< 0.0001