Cardiovascular DiseasesPhase 3NCT00000509
Potassium and Sodium to Control Blood Pressure in Hypertensives
A Phase 3 study testing diet, sodium-restricted and diet, potassium-supplementation in people with Cardiovascular Diseases and Heart Diseases, run by University of Minnesota.
Trial summary
To examine the role of dietary sodium reduction with and without potassium supplementation in controlling blood pressure in hypertensive men. Read more about this study
- Who is it for?
- Ages 45 to 68 years, men only
- Conditions the study is for
- Cardiovascular Diseases, Heart Diseases, Hypertension
- What is being tested?
- diet, sodium-restricted and diet, potassium-supplementation
- Type of treatment
- Lifestyle or therapy programme
- How many people
- Not given
- Where
- No sites listed yet
- Study dates
- Sep 1983to Sep 2003
- Phase
- Phase 3
- 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 45 to 68 years
- Men only
- No healthy volunteers
- Adult, Older adult
Men, ages 45 to 68. Subjects were hypertensive, were treated for at least 3.5 years with antihypertensive drugs and whose diastolic blood pressure was less than 90 mm Hg.
About this study
To examine the role of dietary sodium reduction with and without potassium supplementation in controlling blood pressure in hypertensive men.
Read the detailed description
BACKGROUND:
Appropriately increased interest and concern about high blood pressure as a major public health problem coincided with the indication that the risks of hypertension-related morbidity and mortality could be reduced by reduction of blood pressure. Consensus suggestions that individualized approaches be used in treating patients with mild hypertension stimulated further investigations of non-pharmacological methods. Such investigations were also of considerable interest in relation to understanding the physiology of blood pressure control as well as the development of less costly non-drug therapies. Interest was heightened by information suggesting that there might be distinctly harmful side effects related to antihypertensive drug therapy, particularly thiazide diuretics, in some settings. Studies of non-drug therapies included dietary modifications primarily involving weight reduction and sodium restriction with increasing recent concern about other factors such as alcohol intake, dietary fat, calcium, magnesium, and potassium intake.
DESIGN NARRATIVE:
Randomized, double-blind. One hundred forty-five subjects were randomized into a low sodium placebo group in which sodium intake was restricted to no more than 80 mEq/day, 142 subjects into a potassium supplementation (96 mEq/day) group whose sodium intake was also restricted to no more than 80 mEq/day. After 12 weeks of intervention, antihypertensive drugs were withdrawn. Follow-up of each participant was for at least two years. The primary endpoint was the proportion of subjects requiring antihypertensive medication at various points following randomization.
- Being tested
- diet, sodium-restricted, diet, potassium-supplementation
- Medical subject headings
- Cardiovascular Diseases, Heart Diseases, Hypertension, Vascular Diseases
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
diet, sodium-restrictedBehavioural
diet, potassium-supplementationBehavioural
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Oct 1999 (estimated)
- Study startSep 1983
- Primary completionSep 2003
- Study completionSep 2003
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (2)Papers the sponsor has linked to this study.
- Other trials for Cardiovascular DiseasesStudies of the same condition, open and under way.
- More trials run by University of MinnesotaThe sponsor's other registered studies.
- 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
Sponsor and investigators
- Lead sponsor
- University of Minnesota
- Sponsor type
- University, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00000509
- Sponsor's protocol ID
- 28
- Other IDs
- R01HL034767
- Status last verified
- Mar 2017
- First submitted
- 27 Oct 1999
- Last updated
- 16 Mar 2017
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Grimm RH, Kofron PM, Neaton JD, Svendsen KH, Elmer PJ, Holland L, Witte L, Clearman D, Prineas RJ. Effect of potassium supplementation combined with dietary sodium reduction on blood pressure in men taking antihypertensive medication. J Hypertens Suppl. 1988 Dec;6(4):S591-3. doi: 10.1097/00004872-198812040-00185.
PubMed 3241259Grimm RH Jr, Neaton JD, Elmer PJ, Svendsen KH, Levin J, Segal M, Holland L, Witte LJ, Clearman DR, Kofron P, et al. The influence of oral potassium chloride on blood pressure in hypertensive men on a low-sodium diet. N Engl J Med. 1990 Mar 1;322(9):569-74. doi: 10.1056/NEJM199003013220901.
PubMed 2406601
Study at a glance
From the registry record, last updated by the sponsor on 16 Mar 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Potassium and Sodium to Control Blood Pressure in Hypertensives
- ClinicalTrials.gov ID
- NCT00000509
- Acronym / sponsor ID
- 28
- Phase
- Phase 3
- Study type
- Interventional
- Recruitment status
- Completed
- Lead sponsor
- University of MinnesotaUniversity, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Study start
- Sep 1983
- Primary completion
- Sep 2003 (actual)
- Study completion
- Sep 2003
- First posted
- 28 Oct 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.
To examine the role of dietary sodium reduction with and without potassium supplementation in controlling blood pressure in hypertensive men.
Detailed description
BACKGROUND:
Appropriately increased interest and concern about high blood pressure as a major public health problem coincided with the indication that the risks of hypertension-related morbidity and mortality could be reduced by reduction of blood pressure. Consensus suggestions that individualized approaches be used in treating patients with mild hypertension stimulated further investigations of non-pharmacological methods. Such investigations were also of considerable interest in relation to understanding the physiology of blood pressure control as well as the development of less costly non-drug therapies. Interest was heightened by information suggesting that there might be distinctly harmful side effects related to antihypertensive drug therapy, particularly thiazide diuretics, in some settings. Studies of non-drug therapies included dietary modifications primarily involving weight reduction and sodium restriction with increasing recent concern about other factors such as alcohol intake, dietary fat, calcium, magnesium, and potassium intake.
DESIGN NARRATIVE:
Randomized, double-blind. One hundred forty-five subjects were randomized into a low sodium placebo group in which sodium intake was restricted to no more than 80 mEq/day, 142 subjects into a potassium supplementation (96 mEq/day) group whose sodium intake was also restricted to no more than 80 mEq/day. After 12 weeks of intervention, antihypertensive drugs were withdrawn. Follow-up of each participant was for at least two years. The primary endpoint was the proportion of subjects requiring antihypertensive medication at various points following randomization.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
Who may qualify
- Ages
- 45 to 68 years
- Sex
- Male only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
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 |
|---|---|---|
| diet, sodium-restricted | Behavioural | – |
| diet, potassium-supplementation | Behavioural | – |
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 16 Mar 2017.
- Background: PubMed 3241259Grimm RH, Kofron PM, Neaton JD, Svendsen KH, Elmer PJ, Holland L, Witte L, Clearman D, Prineas RJ. Effect of potassium supplementation combined with dietary sodium reduction on blood pressure in men taking antihypertensive medication. J Hypertens Suppl. 1988 Dec;6(4):S591-3. doi: 10.1097/00004872-198812040-00185.
- Background: PubMed 2406601Grimm RH Jr, Neaton JD, Elmer PJ, Svendsen KH, Levin J, Segal M, Holland L, Witte LJ, Clearman DR, Kofron P, et al. The influence of oral potassium chloride on blood pressure in hypertensive men on a low-sodium diet. N Engl J Med. 1990 Mar 1;322(9):569-74. doi: 10.1056/NEJM199003013220901.
- Individual participant dataSharing planned: No
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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.
Questions about this trial
What is this clinical trial studying?
A Phase 3 study testing diet, sodium-restricted and diet, potassium-supplementation in people with Cardiovascular Diseases and Heart Diseases, run by University of Minnesota.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
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 16 Mar 2017. Status can change between updates, so confirm with the study contact before making plans.
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?
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 NCT00000509, which also lists 2 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 16 Mar 2017.