HypertensionFEVERNCT01136863
Felodipine Event Reduction Study
A study testing Felodipine in people with Hypertension, run by Chinese Academy of Medical Sciences at 1 site in China.
Trial summary
FEVER is an investigator-designed, prospective, multicentre,double-bind, randomized, placebo-controlled,parallel-group trial. The primary objective is to compare the long-term effects on the incidence of fatal and non-fatal stroke (and secondarily of other cardiovascular events) of administering a small dose of the… Read more about this study
- Who is it for?
- Ages 50 to 79 years
- Conditions the study is for
- Hypertension
- What is being tested?
- Felodipine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 9,800 participants
- Where
- 1 siteChina
- Study dates
- Apr 1998to Jun 2004
- Phase
- Interventional
- 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 50 to 79 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- SBP of 210 mmHg or less and DBP less than 115 mmHg if under antihypertensive treatment; SBP 160-210 mmHg or DBP 95-115 mmHg if untreated. Presence of at least one or two risk factors or cardiovascular diseases Informed consent obtained
Who cannot join
- stroke or myocardial infarction during the previous 6 months; secondary hypertension; unstable angina; cardiomyopathy or significant valvular disease; serum creatinine greater than 178 mmol/l (2.0 mg/dl); gout; uncontrolled diabetes(fasting plasma glucose > 10 mmol/l, 180 mg/dl despite therapy); serious pulmonary or hepatic disease; known contraindications to study drugs; unwillingness to cooperate
Trial locations and contacts
1 site in 1 country.
About this study
FEVER is an investigator-designed, prospective, multicentre,double-bind, randomized, placebo-controlled,parallel-group trial. The primary objective is to compare the long-term effects on the incidence of fatal and non-fatal stroke (and secondarily of other cardiovascular events) of administering a small dose of the calcium antagonist felodipine (5 mg once a day) or of a placebo, in hypertensive patients whose blood pressure had preliminarily been reduced by administering a low-dose diuretic (hydrochlorothiazide,12.5 mg once a day) to be continued in association with felodipine or placebo, throughout the trial.
- Conditions
- Hypertension
- Being tested
- Felodipine, Placebo
- Keywords
- hypertension, felodipine, moderate to high risk patients
- Medical subject headings
- Hypertension
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
FelodipineDrug
PlaceboDrug
| Study group | Role | What they receive |
|---|---|---|
| felodipine group, active, pill | Active comparator | felodipine and HCTZ treatment group Receives: Drug: Felodipine |
| placebo, no treatment, pill | Placebo comparator | placebo and HCTZ group Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Composite of fatal and non-fatal stroke
Measured: During the study period
Secondary outcomes (4)
all cause death
Measured: during the study period
cardiac event
Measured: during the study period
All cardiovascular events
Measured: during the study period
new onset diabetes
Measured: during the study period
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Jun 2010 (estimated)
- Study startApr 1998
- Primary completionJun 2004
- Study completionJun 2004
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 HypertensionStudies 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 N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 9,800 participants (actual)
Sponsor and investigators
- Lead sponsor
- Chinese Academy of Medical Sciences
- Sponsor type
- University, hospital or other
- Collaborators
- Shanxi Kangbao Pharmaceutical company, Beijing Hypertension League Insititute
- Investigators
- Lisheng Liu, MD, Principal investigator, Fu Wai Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01136863
- Sponsor's protocol ID
- 96-906-02-11
- Acronym
- FEVER
- Status last verified
- Jan 2005
- First submitted
- 2 Jun 2010
- Last updated
- 25 Jun 2010
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Zhang Y, Zhang X, Liu L, Zanchetti A; FEVER Study Group. Is a systolic blood pressure target <140 mmHg indicated in all hypertensives? Subgroup analyses of findings from the randomized FEVER trial. Eur Heart J. 2011 Jun;32(12):1500-8. doi: 10.1093/eurheartj/ehr039. Epub 2011 Feb 22.
PubMed 21345850
Study at a glance
From the registry record, last updated by the sponsor on 25 Jun 2010. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Felodipine Event Reduction Study
- ClinicalTrials.gov ID
- NCT01136863
- Acronym / sponsor ID
- FEVER / 96-906-02-11
- Conditions
- Hypertension
- Keywords
- hypertension, felodipine, moderate to high risk patients
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 9,800 participants (actual)
- Lead sponsor
- Chinese Academy of Medical SciencesUniversity, hospital or other
- Collaborators
- Shanxi Kangbao Pharmaceutical company, Beijing Hypertension League Insititute
- Study start
- Apr 1998
- Primary completion
- Jun 2004 (actual)
- Study completion
- Jun 2004 (actual)
- First posted
- 4 Jun 2010 (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.
FEVER is an investigator-designed, prospective, multicentre,double-bind, randomized, placebo-controlled,parallel-group trial. The primary objective is to compare the long-term effects on the incidence of fatal and non-fatal stroke (and secondarily of other cardiovascular events) of administering a small dose of the calcium antagonist felodipine (5 mg once a day) or of a placebo, in hypertensive patients whose blood pressure had preliminarily been reduced by administering a low-dose diuretic (hydrochlorothiazide,12.5 mg once a day) to be continued in association with felodipine or placebo, throughout the trial.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| felodipine group, active, pill | Active comparator | Drug: Felodipinefelodipine and HCTZ treatment group |
| placebo, no treatment, pill | Placebo comparator | Drug: Placeboplacebo and HCTZ group |
Who may qualify
- Ages
- 50 to 79 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- SBP of 210 mmHg or less and DBP less than 115 mmHg if under antihypertensive treatment; SBP 160-210 mmHg or DBP 95-115 mmHg if untreated. Presence of at least one or two risk factors or cardiovascular diseases Informed consent obtained
Key exclusion criteria (1 listed)
- stroke or myocardial infarction during the previous 6 months; secondary hypertension; unstable angina; cardiomyopathy or significant valvular disease; serum creatinine greater than 178 mmol/l (2.0 mg/dl); gout; uncontrolled diabetes(fasting plasma glucose > 10 mmol/l, 180 mg/dl despite therapy); serious pulmonary or hepatic disease; known contraindications to study drugs; unwillingness to cooperate
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 |
|---|---|---|
| Felodipine | Drug | felodipine group, active, pill |
| Placebo | Drug | placebo, no treatment, pill |
Primary outcome
Composite of fatal and non-fatal stroke
Time frame: During the study period
4 secondary outcomes
all cause death
Time frame: during the study period
cardiac event
Time frame: during the study period
All cardiovascular events
Time frame: during the study period
new onset diabetes
Time frame: during the study period
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 25 Jun 2010.
- Derived from this study: PubMed 21345850Zhang Y, Zhang X, Liu L, Zanchetti A; FEVER Study Group. Is a systolic blood pressure target <140 mmHg indicated in all hypertensives? Subgroup analyses of findings from the randomized FEVER trial. Eur Heart J. 2011 Jun;32(12):1500-8. doi: 10.1093/eurheartj/ehr039. Epub 2011 Feb 22.
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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.
Lisheng Liu, MD principal investigator
Fu Wai Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Felodipine in people with Hypertension, run by Chinese Academy of Medical Sciences at 1 site in China.
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 25 Jun 2010. 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 China. 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. Some participants in this study may receive a placebo. 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?
Composite of fatal and non-fatal stroke (time frame: During the study period). 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 NCT01136863, 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 25 Jun 2010; AzTrials last refreshed its copy on 28 Oct 2026.