ObesityNCT00001625
Methods for Measuring Insulin Sensitivity
An observational study of Obesity and Hypertension, run by National Center for Complementary and Integrative Health (NCCIH) at 1 site in United States.
Trial summary
Patients with high blood pressure, diabetes, and who are overweight are known to have defects in the way their body responds to insulin. The purpose of this study is to develop better methods for measuring the way body tissue responds to insulin and sugar (glucose). Read more about this study
- Who is it for?
- Ages 21 to 65 years
- Conditions the study is for
- Obesity, Hypertension, Diabetes-Mellitus, Non-Insulin Dependent
- How many people
- 480 participants
- Where
- 1 siteUnited States
- Study dates
- 3 Apr 1997to 11 Apr 2007
- 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 21 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Normal Volunteers:
- Adults between the ages of 21 and 55 in good general health with no significant underlying illnesses, on no medication, and a normal body mass index (20-26 kg/m(2)).
- Obese Subjects:
- Adults between the ages of 21 and 55 in good general health with no significant underlying illnesses, on no medication, and a body mass index between 30 and 35 kg/m(2).
- Hypertensive Subjects:
- Adults between the ages of 21 and 55 in good general health except for mild to moderate hypertension (blood pressure between 140/95 and 170/109 off medication), on no medication except for antihypertensive agents.
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- Subjects will be taken off all antihypertensive drugs for at least one week prior to study. If a subjects blood pressure exceeds 180/110 on three determinations over a period of at least 15 minutes, the subject will be withdrawn from the study and appropriate antihypertensive therapy resumed.
- Diabetic Subjects:
- Adults between the ages of 21 and 65 in good general health except for non-insulin dependent diabetes mellitus controlled with oral hypoglycemic agents. Subjects on no other medications. If fasting blood glucose exceeds 300 mg/dl, the subject will be withdrawn from the study and appropriate therapy resumed.
Who cannot join
- Pregnancy, liver disease, pulmonary disease, end-organ damage such as renal insufficiency, coronary artery disease, heart failure, peripheral vascular disease, proliferative retinopathy, diabetic neuropathy, or HIV infection.
Trial locations and contacts
1 site in 1 country.
United States1 site
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, 20892
About this study
Official title: Methods for Assessing Insulin Sensitivity In Vivo
Patients with high blood pressure, diabetes, and who are overweight are known to have defects in the way their body responds to insulin. The purpose of this study is to develop better methods for measuring the way body tissue responds to insulin and sugar (glucose).
Researchers are planning to study four groups of patients.
Read more
- Normal volunteers
- Patients who have mild to moderate high blood pressure
- Patients who are overweight
- Patients who have mild to moderate diabetes controlled with oral medication
In this study patients and volunteers will undergo two separate tests designed to determine how well insulin is working in the body. The first test is called a glucose clamp test. Patients will have two needles placed in the veins of their arms. One needle will be used to take blood samples, the other needle will be used to inject doses of sugar (glucose) and insulin.
The second test is called the frequently sample intravenous glucose tolerance test. In this test patients will have sugar (glucose) injected into their veins followed by a slow injected dose (infusion) of insulin. Researchers will periodically take blood samples during the test.
Patients participating in the study will not directly benefit from it. However, the information gained from this study may be useful for improving the diagnosis and therapy of diseases such as diabetes, obesity, and high blood pressure (hypertension).
Read the detailed description
We hypothesize that the majority of the information needed to accurately estimate insulin sensitivity is contained in the fasting insulin and glucose levels as well as the insulin and glucose levels obtained shortly after an intravenous glucose load. We propose to test this hypothesis by performing both hyperinsulinemic euglycemic glucose clamps as well as intravenous glucose tolerance tests on normal volunteers and groups of patients with diabetes, hypertension, or obesity (diseases known to be associated with insulin resistance). Data from these studies will be used obtain estimates of insulin sensitivity by the glucose clamp method, minimal model method, and a novel analysis that utilizes only fasting and peak levels of glucose and insulin. We hope to devise a simpler method for determining insulin sensitivity in vivo that is suitable for testing large populations. This method will require only a few blood samples, take less than one hour to perform, and correlate with glucose clamp estimates at least as well as the minimal model method.
- Keywords
- Insulin Resistance, Obesity, Hypertension, Diabetes, Mathematical Modeling, Normal Volunteer
- Medical subject headings
- Obesity, Hypertension, Diabetes Mellitus, Type 2, Insulin Resistance, Diabetes Mellitus
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Nov 1999 (estimated)
- Study start3 Apr 1997
- Study completion11 Apr 2007
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for ObesityStudies 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
- Enrolment
- 480 participants
Sponsor and investigators
- Lead sponsor
- National Center for Complementary and Integrative Health (NCCIH)
- Sponsor type
- US National Institutes of Health
- Collaborators
- Office of Dietary Supplements (ODS)
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00001625
- Sponsor's protocol ID
- 970105
- Other IDs
- 97-AT-0105
- Status last verified
- 11 Apr 2007
- First submitted
- 3 Nov 1999
- Last updated
- 2 Jul 2017
- Results posted
- No
Publications
Quon MJ, Cochran C, Taylor SI, Eastman RC. Non-insulin-mediated glucose disappearance in subjects with IDDM. Discordance between experimental results and minimal model analysis. Diabetes. 1994 Jul;43(7):890-6. doi: 10.2337/diab.43.7.890.
PubMed 8013753
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Methods for Assessing Insulin Sensitivity In Vivo
- ClinicalTrials.gov ID
- NCT00001625
- Acronym / sponsor ID
- 970105
- Keywords
- Insulin Resistance, Obesity, Hypertension, Diabetes, Mathematical Modeling, Normal Volunteer
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 480 participants
- Lead sponsor
- National Center for Complementary and Integrative Health (NCCIH)US National Institutes of Health
- Collaborators
- Office of Dietary Supplements (ODS)
- Study start
- 3 Apr 1997
- Study completion
- 11 Apr 2007
- First posted
- 4 Nov 1999 (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.
Patients with high blood pressure, diabetes, and who are overweight are known to have defects in the way their body responds to insulin. The purpose of this study is to develop better methods for measuring the way body tissue responds to insulin and sugar (glucose).
Researchers are planning to study four groups of patients.
- Normal volunteers
- Patients who have mild to moderate high blood pressure
- Patients who are overweight
- Patients who have mild to moderate diabetes controlled with oral medication
In this study patients and volunteers will undergo two separate tests designed to determine how well insulin is working in the body. The first test is called a glucose clamp test. Patients will have two needles placed in the veins of their arms. One needle will be used to take blood samples, the other needle will be used to inject doses of sugar (glucose) and insulin.
The second test is called the frequently sample intravenous glucose tolerance test. In this test patients will have sugar (glucose) injected into their veins followed by a slow injected dose (infusion) of insulin. Researchers will periodically take blood samples during the test.
Patients participating in the study will not directly benefit from it. However, the information gained from this study may be useful for improving the diagnosis and therapy of diseases such as diabetes, obesity, and high blood pressure (hypertension).
Detailed description
We hypothesize that the majority of the information needed to accurately estimate insulin sensitivity is contained in the fasting insulin and glucose levels as well as the insulin and glucose levels obtained shortly after an intravenous glucose load. We propose to test this hypothesis by performing both hyperinsulinemic euglycemic glucose clamps as well as intravenous glucose tolerance tests on normal volunteers and groups of patients with diabetes, hypertension, or obesity (diseases known to be associated with insulin resistance). Data from these studies will be used obtain estimates of insulin sensitivity by the glucose clamp method, minimal model method, and a novel analysis that utilizes only fasting and peak levels of glucose and insulin. We hope to devise a simpler method for determining insulin sensitivity in vivo that is suitable for testing large populations. This method will require only a few blood samples, take less than one hour to perform, and correlate with glucose clamp estimates at least as well as the minimal model method.
Study design
Who may qualify
- Ages
- 21 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (9 listed)
- Adults between the ages of 21 and 55 in good general health with no significant underlying illnesses, on no medication, and a normal body mass index (20-26 kg/m(2)).
- Adults between the ages of 21 and 55 in good general health with no significant underlying illnesses, on no medication, and a body mass index between 30 and 35 kg/m(2).
- Adults between the ages of 21 and 55 in good general health except for mild to moderate hypertension (blood pressure between 140/95 and 170/109 off medication), on no medication except for antihypertensive agents.
- Subjects will be taken off all antihypertensive drugs for at least one week prior to study. If a subjects blood pressure exceeds 180/110 on three determinations over a period of at least 15 minutes, the subject will be withdrawn from the study and appropriate antihypertensive therapy resumed.
- Adults between the ages of 21 and 65 in good general health except for non-insulin dependent diabetes mellitus controlled with oral hypoglycemic agents. Subjects on no other medications. If fasting blood glucose exceeds 300 mg/dl, the subject will be withdrawn from the study and appropriate therapy resumed.
Key exclusion criteria (1 listed)
- Pregnancy, liver disease, pulmonary disease, end-organ damage such as renal insufficiency, coronary artery disease, heart failure, peripheral vascular disease, proliferative retinopathy, diabetic neuropathy, or HIV infection.
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
Not reported in the source record.
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 2 Jul 2017.
- Background: PubMed 8013753Quon MJ, Cochran C, Taylor SI, Eastman RC. Non-insulin-mediated glucose disappearance in subjects with IDDM. Discordance between experimental results and minimal model analysis. Diabetes. 1994 Jul;43(7):890-6. doi: 10.2337/diab.43.7.890.
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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.
The record lists no contact. Use the official record to reach the sponsor.
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 Obesity and Hypertension, run by National Center for Complementary and Integrative Health (NCCIH) 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 9 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 2 Jul 2017. 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.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00001625, which also lists 1 linked publication.
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 2 Jul 2017; AzTrials last refreshed its copy on 31 Oct 2026.