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Haemodiafiltration vs Conventional Haemodialysis in Children (3H)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02063776
Recruitment Status : Active, not recruiting
First Posted : February 14, 2014
Last Update Posted : February 22, 2018
Information provided by (Responsible Party):
Great Ormond Street Hospital for Children NHS Foundation Trust

Brief Summary:

Children on conventional haemodialysis (HD) die of heart disease. Also, they can be malnourished and short. Haemodiafiltration (HDF) is a newer type of dialysis that achieves better removal of toxins and excess fluid than HD. On HDF, adults have a longer survival and children show improved growth, but mechanisms are not understood.

We will follow children in the UK and Europe to compare HDF and HD. We will monitor growth, heart and blood vessel scans, blood markers and quality of life. If the 3H (HDF-Hearts-Height) study shows reduced cardiovascular morbidity and better growth, HDF may be adopted as the preferred type of dialysis in children.

Condition or disease
Children Haemodialysis Haemodiafiltration

Detailed Description:

Background: Children on conventional haemodialysis (HD) have a 1000-fold higher mortality than their healthy peers and can have malnutrition and growth retardation. Haemodiafiltration (HDF) achieves better clearance of uraemic solutes across a wide molecular-weight range and performs greater ultrafiltration than conventional HD. Randomised controlled trials in adults have shown 35-45% improved survival and reduced cardiovascular mortality on HDF with high convection volumes. Excellent catch-up growth has been demonstrated in children on HDF, but mechanisms are poorly understood.

Hypothesis: HDF improves the cardiovascular risk profile, growth and quality of life (QoL) compared to conventional HD. Primary outcome measures are carotid intima-media thickness (cIMT) and height standard deviation score (SDS).

Plan of investigation: Incident and prevalent patients on HDF or HD who are expected to remain on dialysis for >6-months and who have a single pool Kt/v>1.2 will be compared in a 1:1 study design. Anthropometric measures (height SDS, body mass index SDS) and QoL questionnaires will be monitored at baseline and 6-monthly. Cardiovascular measures (cIMT, pulse wave velocity, left ventricular mass index and 24-hour BP) will be measured annually. 6-monthly blood tests will measure nutritional biomarkers, mineral dysregulation, inflammation and middle-molecule clearance. Outcome measures will be standardised to the convective clearance dose per m2 body surface area. Recruitment will continue for 2½ years with minimum follow-up of 6-months.

Children will be recruited from all UK dialysis units, but small patient numbers (10-12/year) necessitate collaborations with European centres. HDF and HD patients across Europe who are part of the Cardiovascular Comorbidity in Childhood CKD (4C) study will be included and vascular scans will be captured from this study. From ESPN/ERA-EDTA registry data we estimate ~100 children on HDF over the study period.

Outcomes: If the 3H (HDF-Hearts-Height) study shows that HDF reduces cardiovascular morbidity and improves growth it may lead to HDF being adopted as the standard for in-centre dialysis.

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Study Type : Observational
Actual Enrollment : 150 participants
Observational Model: Case-Control
Time Perspective: Prospective
Official Title: The Effects of Haemodiafiltration (HDF) vs Conventional Haemodialysis (HD) on Growth and Cardiovascular Markers in Children - 3H (HDF, Hearts and Height) Study
Study Start Date : February 2014
Actual Primary Completion Date : May 2017
Estimated Study Completion Date : December 2019

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Dialysis

Children on HDF
Children on conventional HD

Primary Outcome Measures :
  1. 1. Change in carotid artery intima-media thickness (cIMT) standard deviation score (SDS) [ Time Frame: 12 months ]
  2. Change in height SDS [ Time Frame: 12 months ]

Secondary Outcome Measures :
  1. For nutritional status 1. Body mass index SDS 2. Markers of appetite regulation and nutritional status [ Time Frame: 6 months ]
  2. For cardiovascular status 1. 24-hour mean arterial BP SDS 2. Left ventricular mass index 3. Pulse wave velocity SDS 4. Biomarkers of cardiovascular disease [ Time Frame: 12 months ]
  3. Quality of life (QoL) questionnaires [ Time Frame: 12 months ]

Biospecimen Retention:   Samples Without DNA
serum only

Information from the National Library of Medicine

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Ages Eligible for Study:   5 Years to 21 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
  • HDF patients will be compared with age-matched HD patients in a 1:1 study design.
  • Children will be recruited from paediatric dialysis units within the UK and also centres in Europe, through the 4C-study.

Inclusion Criteria:

  1. All children 5 - 21 years age undergoing HDF in paediatric dialysis centres (incident and prevalent patients)
  2. Age-matched HD patients
  3. Prevalent HDF and HD patients must achieve a single pool Kt/v>1.2 in the month preceding recruitment

Exclusion Criteria:

1. Children in whom a living donor kidney transplant is planned within 6-months of start of dialysis

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02063776

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United Kingdom
Rukshana Shroff
London, United Kingdom, WC1N 3JH
Sponsors and Collaborators
Great Ormond Street Hospital for Children NHS Foundation Trust
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Study Chair: Rukshana C Shroff, MD FRCPCH PhD Great Ormond Street Hospital for Children NHS Foundation Trust

Publications automatically indexed to this study by Identifier (NCT Number):
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Responsible Party: Great Ormond Street Hospital for Children NHS Foundation Trust Identifier: NCT02063776     History of Changes
Other Study ID Numbers: 13NU02
First Posted: February 14, 2014    Key Record Dates
Last Update Posted: February 22, 2018
Last Verified: February 2018

Keywords provided by Great Ormond Street Hospital for Children NHS Foundation Trust:
Haemodiafiltration (HDF)
Haemodialysis (HD)
Carotid intima media thickness
Pulse wave velocity
Height standard deviation score