# Lahey Clinic: Not applicable (device, behavioral) study closed enrollment, 662 enrolled (Lumbar Spondylolisthesis, Grade 1 Spondylolisthesis)

**Score:** 40/100

| Field | Value |
|---|---|
| Sponsor | Lahey Clinic |
| Sponsor type | Academic and hospital |
| Study | SLIP II Registry: Spinal Laminectomy Versus Instrumented Pedicle Screw Fusion |
| NCT ID | NCT03570801 |
| Phase | Not applicable (device, behavioral) |
| Status | active not recruiting |
| Conditions | Lumbar Spondylolisthesis; Grade 1 Spondylolisthesis; Lumbar Spinal Stenosis; Degenerative Spondylolisthesis |
| Intervention types | other |
| Target enrollment | 662 |
| Site countries | United States, Canada |
| Posted | 2018-06-27 |
| Planned start | 2017-10-17 |
| Event | Enrollment closed (active, not recruiting) |
| Event date | 2026-10-21 |
| Last update posted | 2026-10-21 |

## Why this score
- Enrollment closed: data management, monitoring and closeout ahead.
- 662 participants planned.

Source: ClinicalTrials.gov (U.S. National Library of Medicine) API v2 (https://clinicaltrials.gov/study/NCT03570801). Last refreshed: 2026-11-04T06:04:38.232Z.
From public ClinicalTrials.gov registrations. Sponsor and study level only: we never list investigators, contacts or participants. A registration describes a planned study and can change. Status changes are read from each study's current status, actual dates and latest posted update, not a full change history, so an update can be a correction rather than a new change. Verify on ClinicalTrials.gov.