Fig. 1

a–c Trends in surgical treatment for patients with lumbar spinal stenosis with degenerative spondylolisthesis, lumbar spinal stenosis without degenerative spondylolisthesis, and lumbar disk herniations between 2007 and 2016
a–c Trends in surgical treatment for patients with lumbar spinal stenosis with degenerative spondylolisthesis, lumbar spinal stenosis without degenerative spondylolisthesis, and lumbar disk herniations between 2007 and 2016