Parkinson's DiseasePhase 3NCT01076452
Phase II Subthalamic Nucleus (STN) vs. Globus Pallidus (GPi) Trial
A Phase 3 study testing Bilateral Deep Brain Stimulation in people with Parkinson's Disease, run by US Department of Veterans Affairs at 14 sites in United States.
Trial summary
The goal of the second phase of the study is to determine if simultaneous bilateral subthalamic nucleus stimulation or simultaneous bilateral globus pallidus stimulation is more effective in reducing symptoms of Parkinson's Disease. Read more about this study
- Who is it for?
- Ages 22 years and older
- Conditions the study is for
- Parkinson's Disease
- What is being tested?
- Bilateral Deep Brain Stimulation
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 299 participants
- Where
- 14 sitesUnited States
- Study dates
- Apr 2002to Apr 2009
- Phase
- Phase 3
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 22 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- idiopathic Parkinson's Disease
- Hoehn and Yahr stage 2 or worse when off medications
- L-dopa responsive with clearly defined "on" periods (i.e. symptoms improve at least partially with L-dopa administration, a characteristic that helps distinguish idiopathic PD from "Parkinson's Plus" and atypical Parkinson's syndromes-see below)
- persistent disabling symptoms (e.g. on troubling dyskinesias, or disabling "off" periods at least 3 hours/day) despite medication therapy. Patients will have been treated with variable doses of levodopa and dopamine agonists (at a minimum) and will have had an adequate trial of other adjunctive medications)
- stable on medical therapy for at least one month prior to study enrollment
- age >21
- available and willing to be followed-up according to study protocol
Who cannot join
- "Parkinson's plus" syndromes, secondary, or atypical Parkinson's syndromes (e.g. progressive supranuclear palsy, striato-nigral degeneration, multiple system atrophy, post-stroke, post-traumatic, or post-encephalitic Parkinson's. These patients have cardinal symptoms characteristic of PD but with additional symptoms indicating other organic brain dysfunction, such as gaze palsies, autonomic dysfunction, lack of response to L-dopa, these individuals tend not to improve with standard treatments for PD)
- previous Parkinson's Disease surgery
- medical contraindications to surgery or stimulation (e.g. uncontrolled hypertension, advanced coronary artery disease, other implanted stimulation or electronically-controlled devices including cardiac demand pacemaker, aneurysm clips, cochlear implants, or a spinal cord stimulator) (Note: for the subject who receives either a pacemaker and/or defibrillator after this study enrollment, he/she will be allowed to continue the study if the neurostimulator system can be adequately programmed to permit system compatibility)
- contraindication to magnetic resonance imaging (e.g. indwelling metal fragments or implants that might be affected by MRI)
- active alcohol or drug abuse
- score on Mini-Mental Status examination of 24 or lower, or other neuropsychological dysfunction 9e.g. dementia) that would contraindicate surgery
Show all 9Show fewer
- intracranial abnormalities that would contraindicate surgery (e.g. stroke, tumor, vascular abnormality affecting the target area)
- pregnancy
- concurrent participation in another research protocol
Trial locations and contacts
14 sites in 1 country.
14 sites in 1 country
United States14 sites
Baylor College of Medicine
Houston, Texas, 77030
Michael E. DeBakey VA Medical Center (152)
Houston, Texas, 77030
VA Medical Center, Iowa City
Iowa City, Iowa, 52246-2208
University of California at Los Angeles
Los Angeles, California, 90073
University of Pennsylvania Hospital
Philadelphia, Pennsylvania, 19104
Philadelphia, OPC
Philadelphia, Pennsylvania, 19106
VA Medical Center, Portland
Portland, Oregon, 97201
Oregon Health Sciences University
Portland, Oregon, 97207
Hunter Holmes McGuire VA Medical Center
Richmond, Virginia, 23249
Medical College of Virginia
Richmond, Virginia, 23249
University of California at San Francisco
San Francisco, California, 94121
VA Medical Center, San Francisco
San Francisco, California, 94121
VA Puget Sound Health Care System, Seattle
Seattle, Washington, 98108
VA Greater Los Angeles Healthcare System, West LA
West Los Angeles, California, 90073
About this study
Official title: CSP #468 Phase II - A Comparison of Best Medical Therapy and Deep Brain Stimulation of Subthalamic Nucleus and Globus Pallidus for the Treatment of Parkinson's Disease, Phase II
The goal of the second phase of the study is to determine if simultaneous bilateral subthalamic nucleus stimulation or simultaneous bilateral globus pallidus stimulation is more effective in reducing symptoms of Parkinson's Disease.
Read the detailed description
Deep Brain Stimulation (DBS) is a promising therapy for Parkinson's disease (PD) Whether DBS is superior to comprehensive best medical therapy or whether some patients or symptoms respond better to DBS in one area of the brain or the other is currently not known. The goals of this project are to compare the effectiveness of DBS and comprehensive medical therapy as treatments for PD (Phase I) and to compare bilateral DBS at 2 areas of the brain-the subthalamic nucleus (STN) and the globus pallidus (GPi) -to determine the most effective brain site for surgical intervention (Phase II) In this prospective, randomized, multi-center trial, 316 patients will be enrolled at 13 centers over four and a half years. Patients will initially be randomized to immediate surgery (DBS) or to 6 months of "best medical therapy". BMT arm patients will then be randomized to proceed into the DBS surgical phase of the trial. The DBS site (STN pr GPi) will be assigned on a random basis at the time the patient enters the surgical phase of the trial. Patients will be followed for two years post surgery (24 months for DBS only patients and 30 months for BMT-DBS patients) Effective 8/5/05 randomization to the BMT arm has been discontinued since the study has sufficient information to compare the outcomes of DBS and BMT patients at 6 months. The findings will be critically important in establishing the optimal surgical treatment of the disabling symptoms of PD.
- Conditions
- Parkinson's Disease
- Being tested
- Bilateral Deep Brain Stimulation
- Keywords
- Parkinson's Disease, levo-dopa, tremor, dyskinesia, subthalamic nucleus, globus pallidus
- Medical subject headings
- Parkinson Disease, Tremor, Dyskinesias
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Bilateral Deep Brain StimulationDevice
The DBS site (STN or GPi) was assigned on a random basis at the time the patient enters the surgical phase of the trial.
| Study group | Role | What they receive |
|---|---|---|
| STN | Active comparator | Participants were randomized to receive deep brain stimulation on STN (Subthalamic Nucleus) target. Receives: Device: Bilateral Deep Brain Stimulation |
| GPi | Active comparator | Participants were randomized to receive deep brain stimulation on GPi (Globus Pallidus) target. Receives: Device: Bilateral Deep Brain Stimulation |
What is being measured
The primary outcome is the main question the study is designed to answer.
The Change From Baseline in the UPDRS-III Score at 24 Months With Deep-brain Stimulation and Without Medication.
The primary outcome measure for the comparison of GPi deep brain stimulation (DBS) to STN DBS is the motor function score of the Unified Parkinson's Disease Rating Scale (UPDRS Part III) measured while the patient is off medications and on stimulation at follow-up visits post surgery. UPDRS Part III has 14 items assessing motor skills including facial expression and speech, tremors, rigidity, posture, gait, and bradykinesia. Left and right sides (arms, legs, and hands) are assessed separately for seven of the functions. The motor function (UPDRS part III) assessments are done by turning on the stimulation with and without taking PD medications (on/off) at each in-person visit. A summary score ranging from 0 to 108 is generated by adding the 14 specific motor function responses. The higher score indicates the worse motor function.
Measured: Baseline and 24 months
Secondary outcomes (3)
The Change From Baseline in the UPDRS Scores Part I (Mentation) at 24 Months.
The UPDRS has four parts (Parts I-IV) in which a total of 42 disease characteristics are assessed. Most characteristics are assessed according to their severity on a 0-4 scale (0 = normal, 4 = most substantial impairment), and some are assessed only for absence (score = 0) or presence (score = 1). Part I has four items assessing intellectual impairment, thought disorder, depression and motivation. A summary score ranging from 0 to16 is generated by adding the four items. The higher score indicates worse condition.
Measured: Baseline and 24 months
The Change From Baseline in the UPDRS Scores Part II (Activity of Daily Living) at 24 Months.
The UPDRS has four parts (Parts I-IV) in which a total of 42 disease characteristics are assessed. Most characteristics are assessed according to their severity on a 0-4 scale (0 = normal, 4 = most substantial impairment), and some are assessed only for absence (score = 0) or presence (score = 1). Part II has 13 items focusing on activities of daily living including walking, writing, dressing and speech. A summary score ranging from 0 to 52 is generated by adding the 13 items. The higher score indicates worse condition.
Measured: Baseline and 24 months
The Change From Baseline in the UPDRS Scores Part IV (Complication of Therapy) at 24 Months.
The UPDRS has four parts (Parts I-IV) in which a total of 42 disease characteristics are assessed. Most characteristics are assessed according to their severity on a 0-4 scale (0 = normal, 4 = most substantial impairment), and some are assessed only for absence (score = 0) or presence (score = 1). Part IV includes four categories (11 items) related to dyskinesias, clinical fluctuations of symptoms, and other complications. A summary score ranging from 0 to 23 is generated by adding the four items. The higher score indicates worse condition.
Measured: Baseline and 24 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted26 Feb 2010 (estimated)
- Study startApr 2002
- Primary completionOct 2008
- Study completionApr 2009
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Parkinson's DiseaseStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 3
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 299 participants (actual)
Sponsor and investigators
- Lead sponsor
- US Department of Veterans Affairs
- Sponsor type
- US federal agency
- Responsible party
- Sponsor
- Investigators
- Kenneth Follett, Study chair, VA Medical Center, Iowa City
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01076452
- Sponsor's protocol ID
- 468 Phase II
- Other IDs
- VA-NINDS-01
- Status last verified
- Jun 2014
- First submitted
- 24 Feb 2010
- Last updated
- 14 Jul 2014
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- Yes
Publications
Weaver FM, Follett K, Stern M, Hur K, Harris C, Marks WJ Jr, Rothlind J, Sagher O, Reda D, Moy CS, Pahwa R, Burchiel K, Hogarth P, Lai EC, Duda JE, Holloway K, Samii A, Horn S, Bronstein J, Stoner G, Heemskerk J, Huang GD; CSP 468 Study Group. Bilateral deep brain stimulation vs best medical therapy for patients with advanced Parkinson disease: a randomized controlled trial. JAMA. 2009 Jan 7;301(1):63-73. doi: 10.1001/jama.2008.929.
PubMed 19126811Follett KA, Weaver FM, Stern M, Hur K, Harris CL, Luo P, Marks WJ Jr, Rothlind J, Sagher O, Moy C, Pahwa R, Burchiel K, Hogarth P, Lai EC, Duda JE, Holloway K, Samii A, Horn S, Bronstein JM, Stoner G, Starr PA, Simpson R, Baltuch G, De Salles A, Huang GD, Reda DJ; CSP 468 Study Group. Pallidal versus subthalamic deep-brain stimulation for Parkinson's disease. N Engl J Med. 2010 Jun 3;362(22):2077-91. doi: 10.1056/NEJMoa0907083.
PubMed 20519680Weaver FM, Follett KA, Stern M, Luo P, Harris CL, Hur K, Marks WJ Jr, Rothlind J, Sagher O, Moy C, Pahwa R, Burchiel K, Hogarth P, Lai EC, Duda JE, Holloway K, Samii A, Horn S, Bronstein JM, Stoner G, Starr PA, Simpson R, Baltuch G, De Salles A, Huang GD, Reda DJ; CSP 468 Study Group. Randomized trial of deep brain stimulation for Parkinson disease: thirty-six-month outcomes. Neurology. 2012 Jul 3;79(1):55-65. doi: 10.1212/WNL.0b013e31825dcdc1. Epub 2012 Jun 20.
PubMed 22722632Weintraub D, Duda JE, Carlson K, Luo P, Sagher O, Stern M, Follett KA, Reda D, Weaver FM; CSP 468 Study Group. Suicide ideation and behaviours after STN and GPi DBS surgery for Parkinson's disease: results from a randomised, controlled trial. J Neurol Neurosurg Psychiatry. 2013 Oct;84(10):1113-8. doi: 10.1136/jnnp-2012-304396. Epub 2013 May 10.
PubMed 23667214Ostrem JL, Luo P, Weaver FM, Follett K, Rothlind J, Galifianakis NB, Lai EC, Bronstein J, Duda J, Holloway K, Sarwar A, Brodsky M, Chung K, Spindler M, Reda D, Snodgrass A, Moy C, Huang G, Wei Y, Marks WJ Jr; CSP 468F Study Group. 10-year clinical outcomes of subthalamic nucleus versus pallidal deep brain stimulation for Parkinson's disease: VA/NINDS CSP #468F. Front Neurol. 2026 Jan 16;16:1728999. doi: 10.3389/fneur.2025.1728999. eCollection 2025.
PubMed 41626017Rothlind JC, York MK, Carlson K, Luo P, Marks WJ Jr, Weaver FM, Stern M, Follett K, Reda D; CSP-468 Study Group. Neuropsychological changes following deep brain stimulation surgery for Parkinson's disease: comparisons of treatment at pallidal and subthalamic targets versus best medical therapy. J Neurol Neurosurg Psychiatry. 2015 Jun;86(6):622-9. doi: 10.1136/jnnp-2014-308119. Epub 2014 Sep 2.
PubMed 25185211
Study at a glance
From the registry record, last updated by the sponsor on 14 Jul 2014. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- CSP #468 Phase II - A Comparison of Best Medical Therapy and Deep Brain Stimulation of Subthalamic Nucleus and Globus Pallidus for the Treatment of Parkinson's Disease, Phase II
- ClinicalTrials.gov ID
- NCT01076452
- Acronym / sponsor ID
- 468 Phase II
- Conditions
- Parkinson's Disease
- Keywords
- Parkinson's Disease, levo-dopa, tremor, dyskinesia, subthalamic nucleus, globus pallidus
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 299 participants (actual)
- Lead sponsor
- US Department of Veterans AffairsUS federal agency
- Collaborators
- National Institute of Neurological Disorders and Stroke (NINDS), Medtronic
- Study start
- Apr 2002
- Primary completion
- Oct 2008 (actual)
- Study completion
- Apr 2009 (actual)
- First posted
- 26 Feb 2010 (estimated)
- Results
- Posted 15 Jan 2014
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The goal of the second phase of the study is to determine if simultaneous bilateral subthalamic nucleus stimulation or simultaneous bilateral globus pallidus stimulation is more effective in reducing symptoms of Parkinson's Disease.
Detailed description
Deep Brain Stimulation (DBS) is a promising therapy for Parkinson's disease (PD) Whether DBS is superior to comprehensive best medical therapy or whether some patients or symptoms respond better to DBS in one area of the brain or the other is currently not known. The goals of this project are to compare the effectiveness of DBS and comprehensive medical therapy as treatments for PD (Phase I) and to compare bilateral DBS at 2 areas of the brain-the subthalamic nucleus (STN) and the globus pallidus (GPi) -to determine the most effective brain site for surgical intervention (Phase II) In this prospective, randomized, multi-center trial, 316 patients will be enrolled at 13 centers over four and a half years. Patients will initially be randomized to immediate surgery (DBS) or to 6 months of "best medical therapy". BMT arm patients will then be randomized to proceed into the DBS surgical phase of the trial. The DBS site (STN pr GPi) will be assigned on a random basis at the time the patient enters the surgical phase of the trial. Patients will be followed for two years post surgery (24 months for DBS only patients and 30 months for BMT-DBS patients) Effective 8/5/05 randomization to the BMT arm has been discontinued since the study has sufficient information to compare the outcomes of DBS and BMT patients at 6 months. The findings will be critically important in establishing the optimal surgical treatment of the disabling symptoms of PD.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| STN | Active comparator | Device: Bilateral Deep Brain StimulationParticipants were randomized to receive deep brain stimulation on STN (Subthalamic Nucleus) target. |
| GPi | Active comparator | Device: Bilateral Deep Brain StimulationParticipants were randomized to receive deep brain stimulation on GPi (Globus Pallidus) target. |
Who may qualify
- Ages
- 22 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (7 listed)
- idiopathic Parkinson's Disease
- Hoehn and Yahr stage 2 or worse when off medications
- L-dopa responsive with clearly defined "on" periods (i.e. symptoms improve at least partially with L-dopa administration, a characteristic that helps distinguish idiopathic PD from "Parkinson's Plus" and atypical Parkinson's syndromes-see below)
- persistent disabling symptoms (e.g. on troubling dyskinesias, or disabling "off" periods at least 3 hours/day) despite medication therapy. Patients will have been treated with variable doses of levodopa and dopamine agonists (at a minimum) and will have had an adequate trial of other adjunctive medications)
- stable on medical therapy for at least one month prior to study enrollment
Key exclusion criteria (9 listed)
- "Parkinson's plus" syndromes, secondary, or atypical Parkinson's syndromes (e.g. progressive supranuclear palsy, striato-nigral degeneration, multiple system atrophy, post-stroke, post-traumatic, or post-encephalitic Parkinson's. These patients have cardinal symptoms characteristic of PD but with additional symptoms indicating other organic brain dysfunction, such as gaze palsies, autonomic dysfunction, lack of response to L-dopa, these individuals tend not to improve with standard treatments for PD)
- previous Parkinson's Disease surgery
- medical contraindications to surgery or stimulation (e.g. uncontrolled hypertension, advanced coronary artery disease, other implanted stimulation or electronically-controlled devices including cardiac demand pacemaker, aneurysm clips, cochlear implants, or a spinal cord stimulator) (Note: for the subject who receives either a pacemaker and/or defibrillator after this study enrollment, he/she will be allowed to continue the study if the neurostimulator system can be adequately programmed to permit system compatibility)
- contraindication to magnetic resonance imaging (e.g. indwelling metal fragments or implants that might be affected by MRI)
- active alcohol or drug abuse
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Bilateral Deep Brain StimulationThe DBS site (STN or GPi) was assigned on a random basis at the time the patient enters the surgical phase of the trial. | Device | GPi, STN |
Primary outcome
The Change From Baseline in the UPDRS-III Score at 24 Months With Deep-brain Stimulation and Without Medication.
Time frame: Baseline and 24 months
The primary outcome measure for the comparison of GPi deep brain stimulation (DBS) to STN DBS is the motor function score of the Unified Parkinson's Disease Rating Scale (UPDRS Part III) measured while the patient is off medications and on stimulation at follow-up visits post surgery. UPDRS Part III has 14 items assessing motor skills including facial expression and speech, tremors, rigidity, posture, gait, and bradykinesia. Left and right sides (arms, legs, and hands) are assessed separately for seven of the functions. The motor function (UPDRS part III) assessments are done by turning on the stimulation with and without taking PD medications (on/off) at each in-person visit. A summary score ranging from 0 to 108 is generated by adding the 14 specific motor function responses. The higher score indicates the worse motor function.
3 secondary outcomes
The Change From Baseline in the UPDRS Scores Part I (Mentation) at 24 Months.
Time frame: Baseline and 24 months
The Change From Baseline in the UPDRS Scores Part II (Activity of Daily Living) at 24 Months.
Time frame: Baseline and 24 months
The Change From Baseline in the UPDRS Scores Part IV (Complication of Therapy) at 24 Months.
Time frame: Baseline and 24 months
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 14 Jul 2014.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Results publication: PubMed 19126811Weaver FM, Follett K, Stern M, Hur K, Harris C, Marks WJ Jr, Rothlind J, Sagher O, Reda D, Moy CS, Pahwa R, Burchiel K, Hogarth P, Lai EC, Duda JE, Holloway K, Samii A, Horn S, Bronstein J, Stoner G, Heemskerk J, Huang GD; CSP 468 Study Group. Bilateral deep brain stimulation vs best medical therapy for patients with advanced Parkinson disease: a randomized controlled trial. JAMA. 2009 Jan 7;301(1):63-73. doi: 10.1001/jama.2008.929.
- Results publication: PubMed 20519680Follett KA, Weaver FM, Stern M, Hur K, Harris CL, Luo P, Marks WJ Jr, Rothlind J, Sagher O, Moy C, Pahwa R, Burchiel K, Hogarth P, Lai EC, Duda JE, Holloway K, Samii A, Horn S, Bronstein JM, Stoner G, Starr PA, Simpson R, Baltuch G, De Salles A, Huang GD, Reda DJ; CSP 468 Study Group. Pallidal versus subthalamic deep-brain stimulation for Parkinson's disease. N Engl J Med. 2010 Jun 3;362(22):2077-91. doi: 10.1056/NEJMoa0907083.
- Results publication: PubMed 22722632Weaver FM, Follett KA, Stern M, Luo P, Harris CL, Hur K, Marks WJ Jr, Rothlind J, Sagher O, Moy C, Pahwa R, Burchiel K, Hogarth P, Lai EC, Duda JE, Holloway K, Samii A, Horn S, Bronstein JM, Stoner G, Starr PA, Simpson R, Baltuch G, De Salles A, Huang GD, Reda DJ; CSP 468 Study Group. Randomized trial of deep brain stimulation for Parkinson disease: thirty-six-month outcomes. Neurology. 2012 Jul 3;79(1):55-65. doi: 10.1212/WNL.0b013e31825dcdc1. Epub 2012 Jun 20.
- Results publication: PubMed 23667214Weintraub D, Duda JE, Carlson K, Luo P, Sagher O, Stern M, Follett KA, Reda D, Weaver FM; CSP 468 Study Group. Suicide ideation and behaviours after STN and GPi DBS surgery for Parkinson's disease: results from a randomised, controlled trial. J Neurol Neurosurg Psychiatry. 2013 Oct;84(10):1113-8. doi: 10.1136/jnnp-2012-304396. Epub 2013 May 10.
- Derived from this study: PubMed 41626017Ostrem JL, Luo P, Weaver FM, Follett K, Rothlind J, Galifianakis NB, Lai EC, Bronstein J, Duda J, Holloway K, Sarwar A, Brodsky M, Chung K, Spindler M, Reda D, Snodgrass A, Moy C, Huang G, Wei Y, Marks WJ Jr; CSP 468F Study Group. 10-year clinical outcomes of subthalamic nucleus versus pallidal deep brain stimulation for Parkinson's disease: VA/NINDS CSP #468F. Front Neurol. 2026 Jan 16;16:1728999. doi: 10.3389/fneur.2025.1728999. eCollection 2025.
- Derived from this study: PubMed 25185211Rothlind JC, York MK, Carlson K, Luo P, Marks WJ Jr, Weaver FM, Stern M, Follett K, Reda D; CSP-468 Study Group. Neuropsychological changes following deep brain stimulation surgery for Parkinson's disease: comparisons of treatment at pallidal and subthalamic targets versus best medical therapy. J Neurol Neurosurg Psychiatry. 2015 Jun;86(6):622-9. doi: 10.1136/jnnp-2014-308119. Epub 2014 Sep 2.
Related trials for Parkinson's Disease
Enrolling by invitationObservational study
Early Molecular Biomarkers for Differentiating Parkinsonian Syndromes
PARKINSON DISEASE (Disorder), Atypical Parkinsonism
Active, not recruitingPhase 1/2
Clinical Safety and Efficacy of Umbilical Cord Mesenchymal Stromal Cells-derived Exosomes in Patients With Parkinson's Disease
Parkinson Disease (PD)
Active, not recruitingObservational study
Adaptive DBS to Offset STN Dysregulation During Exercise in PD
Parkinson Disease
Not yet recruiting
Compulsive Eating and Brain's Reward System in Different Pathologies
PARKINSON DISEASE (Disorder), Bipolar 1 Disorder
Not yet recruiting
Evaluating the Effect of the Zeen Mobility Device on Clinical Practicality, Safety, and Impact (Via Assessments of Walking, Standing Tolerance, Balance, Endurance, Effort, and Participation in Daily Tasks) in an Outpatient Rehabilitation Setting for Individuals With Mobility Impairments.
Stroke, Parkinson's Disease (PD)
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Kenneth Follett study chair
VA Medical Center, Iowa City
14 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing Bilateral Deep Brain Stimulation in people with Parkinson's Disease, run by US Department of Veterans Affairs at 14 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 7 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 14 Jul 2014. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 14 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 15 Jan 2014). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The Change From Baseline in the UPDRS-III Score at 24 Months With Deep-brain Stimulation and Without Medication. (time frame: Baseline and 24 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01076452, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Jul 2014.