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Blood Pressure and Central Vascular Stiffness in Obese Children. Relationship to Metabolic Disturbances and Subclinical Cardiovascular Damage. Effect of Weight Reduction (AORTA)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified March 2011 by Zealand University Hospital.
Recruitment status was:  Recruiting
Sponsor:
ClinicalTrials.gov Identifier:
NCT01310088
First Posted: March 7, 2011
Last Update Posted: March 11, 2011
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.
Information provided by:
Zealand University Hospital
  Purpose
The global epidemic of obesity in childhood continues to evolve and threaten future health and life expectancy primarily due to the increased incidence of cardiovascular disease. Obesity is strongly related to high blood pressure (hypertension) and both conditions pose a risk for target organ damage, which can follow a subject from childhood into adult life. The AORTA study will investigate central hemodynamics and organ damage in 100 obese children and adolescents in order to gain insight to the complex interplay of hypertension, obesity and subclinical damage in order to intensify more precise prevention, thereby reducing the future development of cardiovascular disease.

Condition Intervention
Central Blood Pressure Obesity Subclinical Organ Damage Children Adolescent Behavioral: Lifestyle intervention

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Blood Pressure and Central Vascular Stiffness in Obese Children. Relationship to Metabolic Disturbances and Subclinical Cardiovascular Damage. Effect of Weight Reduction

Further study details as provided by Zealand University Hospital:

Primary Outcome Measures:
  • Central Blood Pressure [ Time Frame: one year follow up ]
    Obtained by the SphygmoCor Device, software version 9, AtCor Medical, Australia.


Secondary Outcome Measures:
  • Pulse Wave velocity [ Time Frame: one year follow up ]
    Measured in meters per second.

  • Ambulatory Blood Pressure Monitoring and Clinic Blood Pressure [ Time Frame: one year follow up ]

    Measured in milimeters of mercury (mm Hg). Analysed into Blood Pressure standard deviation scores (BP SDS).

    Ambulatory Blood Pressure Monitoring (ABPM) is analysed into Amulatory Arterial Stiffness Index (AASI). ASSI is 1 minus the correlation coefficient when the Systolic Blood Pressure is plottet agiant the diastolic Blood Pressure from a ABPM.


  • Heart Rate variability [ Time Frame: one year follow up ]
  • Metabolic and Cardiovascular Blood Samples [ Time Frame: one year follow up ]
  • Urine Albumine-Creatinine Ratio (UACR) [ Time Frame: one year follow up ]
    Microalbuminuria (MAU) defined by urine albumine-creatinine ratio (UACR) ≥ 3,5 mg/mmol (women) and 2,5 mg/mmol (men). Mean of two morning spot urine samples.

  • Echocardiography and ultrasound of aortic wall distensibility [ Time Frame: one year follow up ]
  • Electrocardiography [ Time Frame: one year follow up ]

    Conventional 12 lead electrocardiography (ECG). Analysis of:

    • Heart rate (beats per minute)
    • P waves, QRS waves, ST segment and T waves (durations: miliseconds, amplitude: milimeters/Voltage)
    • Intervals: PQ, PR, QRS, ST, T waves (miliseconds)
    • Configuration of the T wave.

  • Dual energy X-ray absorptionmetry (DEXA scan) [ Time Frame: one year follow up ]

    A full body DEXA scan gives precise knowlegde of the body fat mass and fat free mass. Fat mass can be converted into fat mass index and fat free mass can be converted into fat free mass index, besides BMI standard deviation score (BMI SDS).

    A DEXA scan also gives information on bone mineral density (BMD), a parameter of bone status, and regional estimates: truncus, abdomen, thorax, arms and legs.


  • Anthropometric measures [ Time Frame: one year follow up ]
    Height, Waist, Weight, BMI (weight/height²)


Estimated Enrollment: 100
Study Start Date: March 2011
Estimated Study Completion Date: December 2013
Estimated Primary Completion Date: June 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Lifestyle counseling
Treatment protocol The Children's Obesity Clinic Department of Paediatrics Holbaek Hospital, University of Copenhagen Denmark
Behavioral: Lifestyle intervention
Treatment protocol. The Children's Obesity Clinic Department of Paediatrics Holbaek Hospital, University of Copenhagen Denmark
No Intervention: Control
Healthy age and gender matched control subjects. Recruited from school visits.

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   10 Years to 18 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • age 10-18
  • BMI for age and sex above 95 percentile
  • referred for treatment at the The Children's Obesity Clinic, Department of Paediatrics, Holbaek Hospital, University of Copenhagen
  • oral and written consent by their parents

Exclusion Criteria:

  • children who can not cooperate to DEXA scanning or other procedures
  • linguistic difficulties that impair communication
  Contacts and Locations
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 ClinicalTrials.gov identifier (NCT number): NCT01310088


Contacts
Contact: Kristian Hvidt, MD 0014559484073 krhv@regionsjaelland.dk

Locations
Denmark
Division of Cardiology, Department of Medicine, Holbaek Hospital, University of Copenhagen Recruiting
Holbaek, Denmark, 4300
Contact: Hans Ibsen, DMSc, MD    0014559484512    hib@regionsjaelland.dk   
Contact: Kristian Hvidt, MD    0014559484073    krhv@regionsjaelland.dk   
The Children's Obesity Clinic, Department of Paediatrics, Holbaek Hospital, University of Copenhagen Recruiting
Holbaek, Denmark, 4300
Contact: Jens-Christian Holm, PhD, MD    0014559484208    jhom@regionsjaelland.dk   
Sponsors and Collaborators
Zealand University Hospital
Investigators
Principal Investigator: Kristian Hvidt, MD Division of Cardiology, Department of Medicine, Holbaek Hospital, University of Copenhagen, Denmark
Study Chair: Hans Ibsen, DMSc, MD Division of Cardiology, Department of Medicine, Holbaek Hospital, University of Copenhagen
Study Director: Jens-Christian Holm, PhD, MD The Children's Obesity Clinic, Department of Paediatrics, Holbaek Hospital, University of Copenhagen
Study Director: Michael Hecht Olsen, DMSc, PhD, MD Division of Cardiology, Department of Medicine, Glostrup Hospital, University of Copenhagen
  More Information

Publications:

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: Kristian Hvidt / MD, Division of Cardiology, Department of Medicine, Holbaek Hospital, University of Copenhagen, Denmark
ClinicalTrials.gov Identifier: NCT01310088     History of Changes
Other Study ID Numbers: AORTA-SJ-166
First Submitted: February 28, 2011
First Posted: March 7, 2011
Last Update Posted: March 11, 2011
Last Verified: March 2011

Keywords provided by Zealand University Hospital:
Childhood
Child
adolescent
central blood pressure
ambulatory blood pressure monitoring
ABPM
clinic blood pressure
pulse wave velocity
PWV
Pulse cave analysis
PWA
heart rate variability
HRV
Echocardiography
Urine microalbuminuria
blood samples

Additional relevant MeSH terms:
Weight Loss
Body Weight Changes
Body Weight
Signs and Symptoms