One-way ANOVA for ADC values among age groups at each anatomical disc level.

ADC values at different anatomical levels of every age group were showed as means±standard deviations (×10−5 mm2/s); ADC1, ADC2, ADC3, ADC4, ADC5 indicate the ADC value from the L1–2 to L5-S1 IVD respectively;*Brown-Forsythe test was used for ANOVA;