The Japan-Combined Treatment With Olmesartan and a Calcium Channel Blocker Versus Olmesartan and Diuretics Randomized Efficacy Study (J-CORE)

November 19, 2008 updated by: Jichi Medical University
The purpose of this study is to investigate which combination therapy is more effective for improving the blood pressure (BP) and reducing target organ damage in Japanese hypertensive patients: Angiotensin II receptor blocker (ARB) plus calcium channel blocker (CCB) or ARB plus diuretics.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Renin-angiotensin (RA) inhibitors have been demonstrated to be the most effective drugs for reducing subclinical target organ damage in hypertensive patients. In several patients, however, BP control is not sufficiently achieved by RA inhibitors alone, and a combination of two drugs is frequently required. It is unclear whether a combination of RA inhibitors and diuretics or CCB is more effective in reducing hypertensive target organ damage. Control of central BP has been shown to be more effective than peripheral BP in predicting cardiovascular events and target organ damage associated with hypertension. The J-CORE study is active controlled, 2-arm parallel group comparison, prospective randomized open blinded end-point (PROBE) design study. The ARB plus CCB combination therapy group is administered olmesartan 20 mg/day and azelnidipine 16 mg/day and the ARB plus diuretics combination therapy group receives olmesartan 20 mg/day and hydrochlorothiazide (HCTZ) 12.5 mg/day. At least 100 patients will be enrolled in each group and the follow up duration will be 24 weeks. The primary endpoint is to compare the changes in the central aortic BP and the ambulatory BP between the two groups. The secondary endpoint is to compare the changes in office BP, home BP, and hypertensive target organ damage between the two groups.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
220

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Japan
      • Tochigi, Japan
        • Jichi Medical University School of Medicine

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

26 years to 81 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Hypertensive outpatients aged 30 years or older, and less than 85 years (at the time of informed consent), regardless of sex
  • Office systolic BP/diastolic BP > 140/90 mmHg in a sitting position even if on treatment with olmesartan 20 mg/day for 3 months.

Exclusion Criteria:

  • Secondary hypertension or malignant hypertension
  • History of myocardial infarction or cerebrovascular accidents within 6 months prior to the screening
  • Percutaneous transluminal coronary angioplasty (PTCA) or coronary artery bypass grafting (CABG) done within 6 months of screening or scheduled
  • Current treatment for congestive cardiac failure (New York Heart Association [NYHA] functional class II or severer) or ejection fraction <40%
  • Atrial fibrillation or atrial flutter
  • Renal dysfunction (serum creatinine ≥2 mg/dl)
  • Hepatic dysfunction (AST and/or ALT ≥100 IU/l)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: A
The ARB plus CCB combination therapy group is administered olmesartan 20 mg/day and azelnidipine 16 mg/day for 6 months.
Drug: Olmesartan medoxomil ＋Azelnidipine
The ARB plus CCB combination therapy group is administered olmesartan 20 mg/day and azelnidipine 16 mg/day for 6 months.
Other Names:
  • arm A
Experimental: H
The ARB plus Diuretics combination therapy group is administered olmesartan medoxomil 20mg/day and hydrochlorothiazide 12.5mg/day for 6 months.
Drug: Olmesartan medoxomil + Hydrochlorothiazide
The ARB plus Diuretics combination therapy group is administered olmesartan medoxomil 20mg/day and hydrochlorothiazide 12.5mg/day for 6 months.
Other Names:
  • arm H

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Changes in central BP and ambulatory BP
Time Frame: 6 months
6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Changes in office BP and home BP.
Time Frame: 6 months
6 months
Changes in hypertensive target organ damage. Clinical laboratory data.
Time Frame: 6 months
6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Jichi Medical University

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Kazuomi Kario, Jichi Medical University School of Medicine

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 1, 2006

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2008

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 1, 2008

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 26, 2007

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 4, 2008

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
February 5, 2008

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 20, 2008

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 19, 2008

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2008

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • J_Core_071226
  • J_Core_071226_01

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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