Table 2. Correlation between age and each disc level relaxometry of NP, AAF and PAF (r values).

Variable	T2 mapping				T1ρ mapping
	NP	AAF	PAF		NP	AAF	PAF
L1L2	−0.28*	0.10	−0.34*		−0.21*	0.17	0.12
L2L3	−0.43*	−0.05	−0.21*		−0.16	0.18	−0.01
L3L4	−0.51*	0.04	−0.31*		−0.27*	0.09	−0.02
L4L5	−0.22*	0.10	−0.23*		−0.15	0.09	0.05
L5S1	−0.20*	−0.01	−0.12		−0.01	0.18	0.13

*, statistically significant correlations (P<0.05). NP, nucleus pulposus; AAF, anterior annulus fibrosus; PAF, posterior annulus fibrosus.