Fig. 2

a SF-36 profiles preoperatively and 1-year postoperatively for patients treated for lumbar spinal stenosis with degenerative spondylolisthesis between 2007 and 2016. b SF-36 profiles preoperatively and 1 year postoperatively for patients treated for lumbar spinal stenosis without degenerative spondylolisthesis between 2007 and 2016. c SF-36 profiles preoperatively and 1 year postoperatively for patients treated for lumbar disk herniation between 2007 and 2016