KRX-0502 (Ferric Citrate) in Subjects With NDD-CKD and IDA (The COMPASS Trial) (COMPASS)

March 10, 2021 updated by: Keryx Biopharmaceuticals

Study of KRX-0502 (Ferric Citrate) Dose Regimens in Subjects With Non-Dialysis Dependent Chronic Kidney Disease and Iron-Deficiency Anemia

The objectives of this study are to assess the long-term efficacy and safety of different dose regimens of KRX-0502 in the treatment of iron deficiency anemia (IDA) in adult subjects with non-dialysis dependent chronic kidney disease (CKD).

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

This is a Phase 4, 48-week, randomized, open-label, multicenter clinical study comprised of 2 periods: a 24-week Dose Titration Period, followed by a 24-week Dose Maintenance Period. The study will consist of 12 scheduled clinic visits over a period of 48 weeks and additional visits as needed.

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.
206

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

  • United States
    • Arizona
      • Phoenix, Arizona, United States, 85032
        • Arizona Kidney Disease and Hypertension center: AKDHC Medical Research Services, LLC
    • California
      • Chula Vista, California, United States, 91910
        • California Institute of Renal Research
      • El Centro, California, United States, 92243
        • California Institute of Renal Research
      • Poway, California, United States, 92064
        • California Institute of Renal Research
    • Colorado
      • Denver, Colorado, United States, 80230
        • Denver Nephrologists, P.C.
    • Florida
      • Miami, Florida, United States, 33143
        • Miami Kidney Group
      • Miami, Florida, United States, 33150
        • Kidney and Hypertension Specialists of Miami, P.A.
    • Georgia
      • Augusta, Georgia, United States, 30904
        • Southeastern Clinical Research Institute, LLC
      • Columbus, Georgia, United States, 31904
        • Renal Associates, LLC
    • Illinois
      • Chicago, Illinois, United States, 60643
        • Research by Design, LLC
    • Mississippi
      • Gulfport, Mississippi, United States, 39501
        • South Mississippi Medical Research, LLC
    • Missouri
      • Kansas City, Missouri, United States, 64111
        • Clinical Research Consultants
    • Nevada
      • Reno, Nevada, United States, 89511
        • Sierra Nevada Nephrology Consultants
    • New Jersey
      • Eatontown, New Jersey, United States, 07724
        • Hypertension and Nephrology Association
    • New York
      • Great Neck, New York, United States, 11021
        • Division of Kidney/HTN Research
    • North Carolina
      • Asheville, North Carolina, United States, 28801
        • Mountain Kidney & Hypertension Associates
      • Charlotte, North Carolina, United States, 28207
        • Metrolina Nephrology Associates, PA
      • Greenville, North Carolina, United States, 27834
        • Eastern Nephrology Associates
      • Jacksonville, North Carolina, United States, 28546
        • Southeastern Nephrology Associates
      • New Bern, North Carolina, United States, 28562
        • Eastern Nephrology Associates
      • Wilmington, North Carolina, United States, 28401
        • Southeastern Nephrology
    • South Carolina
      • Columbia, South Carolina, United States, 29203
        • Columbia Nephrology Associates, PA
      • Orangeburg, South Carolina, United States, 29118
        • South Carolina Nephrology & Hypertension Center, Inc
    • Tennessee
      • Nashville, Tennessee, United States, 37205
        • Nephrology Associates, P.C.
    • Texas
      • Austin, Texas, United States, 78758
        • Research Management, Inc.
      • Austin, Texas, United States, 78751
        • Research Management, Inc.
      • Lufkin, Texas, United States, 75904
        • P & I Clinical Research, LLC
      • San Antonio, Texas, United States, 78212
        • Clinical Advancement Center, PLLC

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Estimated glomerular filtration rate ≥20 mL/min and <60 mL/min
  • Hgb ≥8.5 g/dL and ≤11.5 g/dL
  • Serum ferritin ≤500 ng/mL and transferrin saturation (TSAT) ≤25%
  • Serum intact parathyroid hormone ≤600 pg/mL

Exclusion Criteria:

  • Serum phosphate <3.0 mg/dL
  • Intravenous (IV) iron administered within 4 weeks prior to Screening
  • Erythropoiesis-stimulating agents (ESA) administered within 4 weeks prior to Screening
  • Blood transfusion within 4 weeks prior to Screening

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: Group 1
KRX-0502 1 tablet thrice daily (TID) with meals
Drug: KRX-0502
Oral ferric citrate with meals
Other Names:
  • ferric citrate
Experimental: Group 2
KRX-0502 2 tablets twice daily (BID) with the largest 2 daily meals
Drug: KRX-0502
Oral ferric citrate with meals
Other Names:
  • ferric citrate

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
Measure Description
Time Frame
Change From Baseline in Hemoglobin (Hgb) at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from a mixed model of repeated measures (MMRM), including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 24

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
Measure Description
Time Frame
Change From Baseline in Hgb at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 48
Time From Randomization to the First Increase From Baseline Hgb of at Least 0.5 Grams Per Deciliter (g/dL) During the Dose Titration Period
Time Frame: from Randomization to Week 24
The Kaplan-Meier estimator of the survival function of time from randomization to the first increase from Baseline Hgb of at least 0.5 g/dL for each of the two starting dose treatment groups were obtained.
from Randomization to Week 24
Change From Baseline in Transferrin Saturation (TSAT) at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 24
Change From Baseline in TSAT at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 48
Change From Baseline in Ferritin at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 24
Change From Baseline in Ferritin at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 48
Change From Baseline in Serum Phosphate at Week 24
Time Frame: Baseline; up to Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; up to Week 24
Change From Baseline in Serum Phosphate at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 48
Change From Baseline in Estimated Glomerular Filtration Rate (eGFR) at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 24
Change From Baseline in eGFR at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 48
Change From Baseline in Bicarbonate at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 24
Change From Baseline in Bicarbonate at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates are from an MMRM, including an intercept term and covariates for randomized treatment, visit, treatment by visit interaction, Baseline value, and Baseline value by visit interaction. The Kenward-Roger method was used along with an unstructured covariance matrix.
Baseline; Week 48
Change From Baseline in Intact Parathyroid Hormone (iPTH) at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates obtained using a common slope analysis of covariance (ANCOVA) model which includes the Baseline laboratory parameter as a covariate, randomized treatment group, and a random error term.
Baseline; Week 24
Change From Baseline in iPTH at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates obtained using an uncommon slope ANCOVA model which includes the Baseline laboratory parameter as a covariate, randomized treatment group, randomized treatment group by Baseline interaction, and a random error term.
Baseline; Week 48
Change From Baseline in C-terminal Fibroblast Growth Factor 23 (FGF23) at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates obtained using an uncommon slope ANCOVA model which includes the Baseline laboratory parameter as a covariate, randomized treatment group, randomized treatment group by Baseline interaction, and a random error term.
Baseline; Week 24
Change From Baseline in C-terminal FGF23 at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates obtained using an uncommon slope ANCOVA model which includes the Baseline laboratory parameter as a covariate, randomized treatment group, randomized treatment group by Baseline interaction, and a random error term.
Baseline; Week 48
Change From Baseline in Intact Fibroblast Growth Factor 23 at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates obtained using a common slope ANCOVA model which includes the Baseline laboratory parameter as a covariate, randomized treatment group, and a random error term.
Baseline; Week 24
Change From Baseline in Intact Fibroblast Growth Factor 23 at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Estimates obtained using an uncommon slope ANCOVA model which includes the Baseline laboratory parameter as a covariate, randomized treatment group, randomized treatment group by Baseline interaction, and a random error term.
Baseline; Week 48
Change From Baseline Scores for the Work Productivity and Activity Impairment (WPAI) Questionnaire Adapted for Anemia Associated With Chronic Kidney Disease (CKD) at Week 24: Work-associated Measures
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. The WPAI is a questionnaire to evaluate the effect of anemia associated with Chronic Kidney Disease on the ability to work and perform regular activities. Scores are presented as percentages (multiplying the scores by 100), with 0% representing no impact and 100% representing complete impact.
Baseline; Week 24
Change From Baseline Scores for the WPAI Questionnaire Adapted for Anemia Associated With CKD at Week 48: Work-associated Measures
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. The WPAI is a questionnaire to evaluate the effect of anemia associated with Chronic Kidney Disease on the ability to work and perform regular activities. Scores are presented as percentages (multiplying the scores by 100), with 0% representing no impact and 100% representing complete impact.
Baseline; Week 48
Change From Baseline Scores for the WPAI Questionnaire Adapted for Anemia Associated With CKD at Week 24: Activity Impairment
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. The WPAI is a questionnaire to evaluate the effect of anemia associated with Chronic Kidney Disease on the ability to work and perform regular activities. Scores are presented as percentages (multiplying the scores by 100), with 0% representing no impact and 100% representing complete impact.
Baseline; Week 24
Change From Baseline Scores for the WPAI Questionnaire Adapted for Anemia Associated With CKD at Week 48: Activity Impairment
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. The WPAI is a questionnaire to evaluate the effect of anemia associated with Chronic Kidney Disease on the ability to work and perform regular activities. Scores are presented as percentages (multiplying the scores by 100), with 0% representing no impact and 100% representing complete impact.
Baseline; Week 48
Change From Baseline in the Functional Assessment of Chronic Illness Therapy (FACIT) Fatigue Scale Score at Week 24
Time Frame: Baseline; Week 24
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Participants were asked to respond to 13 statements (as they apply to the last 7 days) that other people with the same illness said are important with one of the following: 0, not at all; 1, a little bit; 2, somewhat; 3, quite a bit; 4, very much. All individual items were summed to create a single fatigue score ranging from 0 to 52. Higher scores indicate greater fatigue.
Baseline; Week 24
Change From Baseline in the Functional Assessment of Chronic Illness Therapy Fatigue Scale Score at Week 48
Time Frame: Baseline; Week 48
Change from Baseline was calculated as the post-Baseline value minus the Baseline value. Participants were asked to respond to 13 statements (as they apply to the last 7 days) that other people with the same illness said are important with one of the following: 0, not at all; 1, a little bit; 2, somewhat; 3, quite a bit; 4, very much. All individual items were summed to create a single fatigue score ranging from 0 to 52. Higher scores indicate greater fatigue.
Baseline; Week 48
Number of Hospitalizations for Participants Who Entered the Dose Maintenance Period
Time Frame: up to Week 48
A hospitalization is defined as admission to the hospital.
up to Week 48
Duration of Hospitalizations for Participants Who Entered the Dose Maintenance Period
Time Frame: up to Week 48
A hospitalization is defined as admission to the hospital.
up to Week 48
Number of Participants With Any Treatment-emergent Adverse Event (TEAE) for Participants Who Entered the Dose Maintenance Period
Time Frame: up to Week 48
Treatment-emergent adverse events are defined as adverse events that began after the first administration of study medication or pre-existing conditions that worsened after the first dose of study medication.
up to Week 48

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.
Keryx Biopharmaceuticals

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.
  • Study Director: Medical Director, Keryx Biopharmaceuticals

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 (Actual)

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.
August 15, 2017

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.
August 30, 2019

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.
September 27, 2019

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).
July 26, 2017

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.
July 31, 2017

First Posted (Actual)

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.
August 1, 2017

Study Record Updates

Last Update Posted (Actual)

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.
March 12, 2021

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.
March 10, 2021

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.
March 1, 2021

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.
  • KRX-0502-402

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

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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