AtherosclerosisNCT00214006
Carotid Atherosclerotic Plaque Study
An observational study of Atherosclerosis, run by University of Wisconsin, Madison at 1 site in United States.
Trial summary
First, to establish a comparison of the pathophysiology of carotid atherosclerosis and the genetic and environmental variables that cause those plaques to become symptomatic. Second, to differentiate between vulnerable plaque and other types of plaque using ultrasound elastography, MRI data, trans-cranial doppler… Read more about this study
- Who is it for?
- Ages 18 to 80 years
- Conditions the study is for
- Atherosclerosis
- How many people
- 162 participants
- Where
- 1 siteUnited States
- Study dates
- Nov 2001to Feb 2011
- Phase
- Observational
- Are there results?
- None posted in the registry
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 18 to 80 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Patients undergoing carotid endarectomy
Who may be able to join
- Male and Female patients aged 18-80 presenting for carotid endarterectomy
Who cannot join
- Patients not felt suitable for carotid endarterectomy and those with impaired decision-making capacity
Trial locations and contacts
1 site in 1 country.
About this study
First, to establish a comparison of the pathophysiology of carotid atherosclerosis and the genetic and environmental variables that cause those plaques to become symptomatic. Second, to differentiate between vulnerable plaque and other types of plaque using ultrasound elastography, MRI data, trans-cranial doppler along with RF (radio frequency) analysis of back-scattered ultrasonic echoes.
Read the detailed description
This is a multi-investigator study based on the pathophysiology of carotid atherosclerosis and the variables that cause certain plaques to become symptomatic.Patients enrolled in this study will be those patients undergoing a carotid endarterectomy. This will include both symptomatic and asymptomatic patients, and there are a variety of atherosclerotic risk factors representing this patient population.Patients may or may not have had strokes or transient ischemic attacks (TIAs).Pre-operatively patients will be reviewed for their medical history and atherosclerotic risk factors. Plaque removed during routine carotid endarterectomy will be examined for study purposes.
- Conditions
- Atherosclerosis
- Medical subject headings
- Atherosclerosis
What is being measured
The primary outcome is the main question the study is designed to answer.
Lipid protein analysis and cognitive status comparison
Comparison studies will be done using the lipid protein analysis and imaging studies. The primary comparison will be between those that are symptomatic and those that are asymptomatic. Secondary comparisons will be done using the lipid protein analysis and patient history.
Comparison of cognitive status between groups will be made using analysis of covariance in which the difference in follow-up score between groups (symptomatic/asymptomatic) is adjusted for baseline score. The baseline adjusted standard error is 6.4, which with 36 subjects per group will yield 90% power to detect a difference between groups of approximately 4.9 points at a significant level of 5%. We need 36 subjects per group to achieve the power stated. We have built in another 15% for projected dropout to insure we meet the final target.
Measured: 2008-2011
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted21 Sep 2005 (estimated)
- Study startNov 2001
- Primary completionNov 2010
- Study completionFeb 2011
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for AtherosclerosisStudies 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
- Observational
- Observational model
- Case only
- Time perspective
- Prospective
- Enrolment
- 162 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Wisconsin, Madison
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Robert J. Dempsey, MD, Principal investigator, University of Wisconsin, Madison
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00214006
- Sponsor's protocol ID
- 2008-0053
- Status last verified
- Mar 2013
- First submitted
- 13 Sep 2005
- Last updated
- 7 Mar 2013
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 7 Mar 2013. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Carotid Atherosclerotic Plaque Study
- ClinicalTrials.gov ID
- NCT00214006
- Acronym / sponsor ID
- 2008-0053
- Conditions
- Atherosclerosis
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 162 participants (actual)
- Lead sponsor
- University of Wisconsin, MadisonUniversity, hospital or other
- Study start
- Nov 2001
- Primary completion
- Nov 2010 (actual)
- Study completion
- Feb 2011 (actual)
- First posted
- 21 Sep 2005 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
First, to establish a comparison of the pathophysiology of carotid atherosclerosis and the genetic and environmental variables that cause those plaques to become symptomatic. Second, to differentiate between vulnerable plaque and other types of plaque using ultrasound elastography, MRI data, trans-cranial doppler along with RF (radio frequency) analysis of back-scattered ultrasonic echoes.
Detailed description
This is a multi-investigator study based on the pathophysiology of carotid atherosclerosis and the variables that cause certain plaques to become symptomatic.Patients enrolled in this study will be those patients undergoing a carotid endarterectomy. This will include both symptomatic and asymptomatic patients, and there are a variety of atherosclerotic risk factors representing this patient population.Patients may or may not have had strokes or transient ischemic attacks (TIAs).Pre-operatively patients will be reviewed for their medical history and atherosclerotic risk factors. Plaque removed during routine carotid endarterectomy will be examined for study purposes.
Study design
- Observational model
- Case only
- Time perspective
- Prospective
Who may qualify
- Ages
- 18 to 80 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Patients undergoing carotid endarectomy
Key inclusion criteria (1 listed)
- Male and Female patients aged 18-80 presenting for carotid endarterectomy
Key exclusion criteria (1 listed)
- Patients not felt suitable for carotid endarterectomy and those with impaired decision-making capacity
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Lipid protein analysis and cognitive status comparison
Time frame: 2008-2011
Comparison studies will be done using the lipid protein analysis and imaging studies. The primary comparison will be between those that are symptomatic and those that are asymptomatic. Secondary comparisons will be done using the lipid protein analysis and patient history. Comparison of cognitive status between groups will be made using analysis of covariance in which the difference in follow-up score between groups (symptomatic/asymptomatic) is adjusted for baseline score. The baseline adjusted standard error is 6.4, which with 36 subjects per group will yield 90% power to detect a difference between groups of approximately 4.9 points at a significant level of 5%. We need 36 subjects per group to achieve the power stated. We have built in another 15% for projected dropout to insure we meet the final target.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 7 Mar 2013.
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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.
Robert J. Dempsey, MD principal investigator
University of Wisconsin, Madison
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Atherosclerosis, run by University of Wisconsin, Madison at 1 site 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 1 inclusion and 1 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 7 Mar 2013. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site 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.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
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?
Lipid protein analysis and cognitive status comparison (time frame: 2008-2011). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
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 7 Mar 2013.