Fig. 1From: Characteristics and standards of severe sagittal imbalance in adult patients with spinal deformities: a retrospective analysisThree groups according to time (△Timewalk) that C7SVA increases after ambulation. All patients were divided into mild (C, △Timewalk ≥ 180 s), moderate (B, 180 s > △Timewalk ≥ 30 s) and severe (A, △Timewalk < 30 s) groups according to the time taken for C7SVA to reach 20cm or more after walkingBack to article page