Please assess the completion status of the following clinical trial:

Trial Title: Treatment of Lumbar Spinal Stenosis; Comparison of Two Different Surgical Methods; Mini-invasive Decompression to X-stop

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* neurogenic intermittent claudication due to lumbar spinal stenosis~* diagnosed on MRI in maximum two levels~* walking distance on 250 metres~* symptom relief on flexion of the lumbar spine~* duration of the symptoms more than 6 months~* non-operative treatment is tried or considered as not indicated~Exclusion Criteria:~* vascular claudicatio intermittens~* spinal stenosis on more than 2 levels~* cauda equina syndrome~* severe paresis~* clinical monoradiculopathy~* grave scoliosis~* previous lumbar surgery~* degenerative spondylolisthesis more than 25%~* spondylolysis with listhesis~* osteoporotic fracture in lumbal column~* clinical and radiological (both) arthritis in the hip joint~* ASA \>3~* verified polyneuropathy on neurophysiological test

- Gender: ALL
- Minimum Age: 50 Years
- Maximum Age: 85 Years
- Healthy Volunteers: f

Study Arms:
- decompression (Type: ACTIVE_COMPARATOR): Minimal invasive decompression
- x-stop (Type: EXPERIMENTAL): X-stop, an interspinous decompression device

Based on this trial design, predict the completion outcome and termination type (if applicable).