Fig. 2

The proportion of modified discs post-operatively on primary outcomes at every FU period. a The proportion of the number of segments acquiring increased UAS-ROM and LAS-ROM at every FU period. b The proportion of positive lordosis of the upper and lower adjacent segment at every FU period. c The proportion of UAS-IDH and LAS-IDH increasing segments at every FU period (FU follow up, UAS-ROM range of motion of upper adjacent segment, LAS-ROM range of motion of lower adjacent segment, UAS-LOR lordosis of upper adjacent segment, LAS-LOR lordosis of lower adjacent segment, UAS-IDH intervertebral disc height of upper adjacent segment, LAS-IDH intervertebral disc height of lower adjacent segment)