Fig. 3From: Association between non-traumatic vertebral fractures and adjacent discs degeneration: a cross-sectional study and literature reviewPercentage of advanced stage disc degeneration at different intervertebral disc (IVD) levels. The degree of disc degeneration was evaluated by sagittal T2-weighted lumbar magnetic resonance imaging (MRI) and was graded according to Pfirrmann’s classification [14] from Grades I to V. Grades I, II and III were defined as early stage IVD degeneration and Grades IV and V as advanced stageBack to article page