lumbar lordosis
Several radiographic spinopelvic parameters were measured as follows: sagittal vertical axis (SVA), thoracic kyphosis (TK), sacral slope (SS), pelvic tilt (PT), pelvic incidence (PI), lumbar lordosis (LL), and segmental lordosis at L4-5 (SL) in the sagittal view, and C7-central sacral vertical line (C7-CSVL) in the coronal view.