Lumbar Epidural Steroid Injections for Spinal Stenosis Multicenter Randomized, Controlled Trial (LESS Trial)
Public ClinicalTrials.gov record NCT01238536. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Multicenter Randomized Controlled Trial of Epidural Steroid Injections for Spinal Stenosis in Persons 50 and Older
Study identification
- NCT ID
- NCT01238536
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 4
- Lead sponsor
- University of Washington
- Other
- Enrollment
- 400 participants
Conditions and interventions
Conditions
Interventions
- Epidural steroid with local anesthetic injection Procedure
- Epidural local anesthetic injection Procedure
- Epidural steroid injection Drug
- Epidural local anesthetic injection Drug
Procedure · Drug
Eligibility (public fields only)
- Age range
- 50 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Mar 31, 2011
- Primary completion
- Jul 31, 2013
- Completion
- Aug 31, 2015
- Last update posted
- Dec 12, 2017
2011 – 2015
United States locations
- U.S. sites
- 10
- U.S. states
- 9
- U.S. cities
- 10
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Kaiser Permanente Northern California | Redwood City | California | 94063 | — |
| Kaiser Permanente Northern California | Roseville | California | 95661 | — |
| University of Colorado | Denver | Colorado | 80045 | — |
| Brigham and Women's Hospital | Boston | Massachusetts | 02467 | — |
| Henry Ford Hospital | Detroit | Michigan | 48202 | — |
| Mayo Clinic | Rochester | Minnesota | 55905 | — |
| Oregon Health and Science University | Portland | Oregon | — | — |
| Dallas VA Medical Center | Dallas | Texas | 75216 | — |
| Virginia Spine Research Institute | Richmond | Virginia | 23235 | — |
| Harborview Medical Center, University of Washington | Seattle | Washington | 98104 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01238536, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Dec 12, 2017 · Synced Jul 22, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01238536 live on ClinicalTrials.gov.