Fig. 2From: A novel minimally invasive technique of inter-spinal distraction fusion surgery for single-level lumbar spinal stenosis in octogenarians: a retrospective cohort studyRadiological indicators at preoperative and each postoperative follow-up point. a IA. b LL. C. PDH. * represented significant difference between the two groups. (IA, intervertebral angle; LL, lumbar lordosis; PDH, posterior disc height)Back to article page