Table 1.

Inclusion and exclusion criteria

Inclusion criteria
1	Patients with degenerative lumbar spinal stenosis requiring surgery due to neurogenic claudication with radiculopathy
2	Patients with one-level central stenosis requiring decompression
3	Patients with MRI findings consistent with symptoms on preoperative radiological examination
4	Patients who agreed to this study
Exclusion criteria
1	Patients who underwent spinal surgery in the past
2	In addition to decompression, patients who needed further segmental fusion surgery.
3	Patients who require multiple segments of decompression surgery( ≥ 3 levels )
4	Patients with cervical lesions other than lumbar lesions.
5	Patient with rapidly progressive neurological deficit
6	Patients who cannot cooperate in completing the questionnaire due to dementia or stroke
7	Neuromuscular disorder
8	Spinal malignancy, spinal infection, etc.