The graph shows the measurement of the sagittal spinopelvic alignments. PI pelvic incidence, LL lumbar lordosis (L1–S1), PLL proximal lumbar lordosis (L1–L4 superior endplate), DLL distal lumbar lordosis (L4 superior endplate to S1), TLK thoracolumbar kyphosis (T10–L2), TK thoracic kyphosis (T5–T12).