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Dietary Intervention Study in Children (DISC)

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: NCT00000459
Recruitment Status : Completed
First Posted : October 28, 1999
Last Update Posted : May 5, 2016
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)

Tracking Information
First Submitted Date  ICMJE October 27, 1999
First Posted Date  ICMJE October 28, 1999
Last Update Posted Date May 5, 2016
Study Start Date  ICMJE December 1986
Primary Completion Date Not Provided
Current Primary Outcome Measures  ICMJE Not Provided
Original Primary Outcome Measures  ICMJE Not Provided
Change History Complete list of historical versions of study NCT00000459 on Archive Site
Current Secondary Outcome Measures  ICMJE Not Provided
Original Secondary Outcome Measures  ICMJE Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE Dietary Intervention Study in Children (DISC)
Official Title  ICMJE Not Provided
Brief Summary To assess the feasibility, acceptability, efficacy, and safety of dietary intervention in free-living children ages 8-10 with elevated low density lipoprotein cholesterol levels.
Detailed Description


Several lines of evidence provided the rationale for intervening in children. A large body of autopsy and pathologic evidence had accumulated showing that atherosclerosis, including fatty streaks, increased surface involvement, and advanced microscopic lesions, began in childhood. Blood cholesterol levels tracked from childhood to adulthood, with tracking correlations ranging from .6 to .8. Therefore, a high proportion of children with high levels of cholesterol have high levels as adults. Family clustering of risk factors had also been reported. Studies showed 2-3 times increased prevalence of coronary heart disease in adult relatives of children with high cholesterol compared to children with normal cholesterol, and 2.2 times increased prevalence in high cholesterol in children who had a parent or grandparent with premature coronary heart disease compared with children who did not have a family history of premature heart disease. Finally, there was high likelihood that environmental influences on coronary heart disease risk factors had their behavioral antecents in childhood. Thus, dietary habits which contributed toward elevated blood cholesterol levels were likely to have developed early in life, and it was hoped that behavioral change achieved during childhood was likely to persist into adulthood.

Although numerous studies had shown that dietary modification could lower blood cholesterol levels in adults, only a few studies had shown this effect in children, and none were long-term. Furthermore, the impact on long-term growth and development in children had not been studied. Concerns were raised about the safety of cholesterol-lowering diets in children, particularly during peak growing years. These concerns included possible deficits in growth and nutrient adequacy, and potential adverse psychological effects. This paucity of data was a potential barrier to active prevention measures. To fill this gap in knowledge, the DISC trial, a randomized, controlled clinical trial, tested the efficacy and safety of long-term dietary intervention for reduction of serum LDL-C levels in children during puberty.


In the feasibility study, children of both sexes, ages 8 to 10 at baseline starting in 1987, were randomized to either a control group or to a usual care group for whom more intensive dietary intervention for the child and the family was directed. The feasibility study lasted 16 months. The full-scale trial began in December 1988 with the randomization of a total of 663 children. At baseline, mean LDL-C levels, nutrient intakes, anthropometric measurements, nutritional biochemical levels, and psychosocial measures were similar in the two groups. The intervention group was assigned to a series of group and individual sessions to teach the children and their families to follow a diet containing 28 percent of calories as total fat, dietary cholesterol intake less than 75 mg/1000 kcal, and up to 9% of calories from polyunsaturated fat. The diets were designed to meet nutritional requirements of growing children. The usual care group was provided a packet of general dietary information only. The primary efficacy outcome was a difference in changes in LDL-C levels between the two groups at 36 months. Primary safety endpoints were change in height and serum ferritin levels. Secondary safety outcomes included serum zinc, retinol, albumin levels, red blood cell folate, ratio of LDL-C to high-density lipoprotein cholesterol, sexual maturation, cognitive development, and psychosocial assessments. Recruitment was completed in July 1990. Intervention and follow-up was extended until 1997 when the participants were on average 17 years old. Data analysis continued through January 1999.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 3
Study Design  ICMJE Allocation: Randomized
Primary Purpose: Prevention
Condition  ICMJE
  • Cardiovascular Diseases
  • Heart Diseases
  • Hypercholesterolemia
Intervention  ICMJE Behavioral: diet, fat-restricted
Study Arms  ICMJE Not Provided
Publications *

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Completed
Enrollment  ICMJE Not Provided
Original Enrollment  ICMJE Not Provided
Actual Study Completion Date  ICMJE January 1999
Primary Completion Date Not Provided
Eligibility Criteria  ICMJE Children, ages 8 to 10, with elevated LDL-C levels.
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 8 Years to 10 Years   (Child)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Not Provided
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT00000459
Other Study ID Numbers  ICMJE 48
U01HL037947 ( U.S. NIH Grant/Contract )
U01HL037948 ( U.S. NIH Grant/Contract )
U01HL037954 ( U.S. NIH Grant/Contract )
U01HL037962 ( U.S. NIH Grant/Contract )
U01HL037966 ( U.S. NIH Grant/Contract )
U01HL037975 ( U.S. NIH Grant/Contract )
U01HL038110 ( U.S. NIH Grant/Contract )
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party Not Provided
Study Sponsor  ICMJE National Heart, Lung, and Blood Institute (NHLBI)
Collaborators  ICMJE Not Provided
Investigators  ICMJE
Investigator: Bruce Barton Maryland Medical Research Institute
PRS Account National Heart, Lung, and Blood Institute (NHLBI)
Verification Date March 2005

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP