Anterior vs Posterior Surgery for Lumbar Isthmic Spondylolisthesis

Inclusion Criteria

• •Male or female aged 18 years or older (or who have reached the age of majority in the participating province)
• •Require surgical treatment for a diagnosis of single-level lumbar isthmic spondylolisthesis, any grade, in the lumbar and lumbosacral spine.
• •Are able to communicate in English or French
• •Anterior interbody fusion group will be defined as having had an anterior or oblique approach with a synthetic cage insertion, interbody bone graft without cage or plate-screw construct with or without posterior rod-screw construct
• •Posterior interbody fusion group will have only posterior approach procedure.