This trial is active, not recruiting.

Conditions down syndrome, alzheimer disease
Treatments vitamin e, multivitamin, placebo
Phase phase 3
Sponsor New York State Institute for Basic Research
Collaborator National Institute on Aging (NIA)
Start date April 2002
End date May 2012
Trial size 350 participants
Trial identifier NCT00056329, IA0039, NIA Grant AG16381, R01AG016381


The goal of this study is to determine the safety and efficacy of the administration of vitamin E, which has been shown to delay the progression of Alzheimer's disease, in slowing the rate of cognitive/functional decline in older persons with Down syndrome.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification safety/efficacy study
Intervention model parallel assignment
Masking double blind (subject, caregiver, investigator, outcomes assessor)
Primary purpose treatment
vitamin E plus multivitamin
vitamin e tocopherol
1,000 international units twice daily for three years
once daily for three years
(Placebo Comparator)
placebo with multivitamin
once daily for three years
Placebo twice daily for three years

Primary Outcomes

Brief Praxis Test, measuring cognitive functions expressed as performances of simple, short, sequences of voluntary movements
time frame: Screening, Baseline, every 6 months for 36 months

Secondary Outcomes

Fuld Object Memory Test (Modified), New Dot Test, Orientation Test, Vocabulary Test, Behavior & Function Down Syndrome Rating Scale, Clinical Global Impression of Change (CGI-C)
time frame: Screening, Baseline, and every 6 months for 36 months

Eligibility Criteria

Male or female participants at least 50 years old.

Inclusion Criteria: - Presence of clinically determined Down syndrome (karyotypes optional). - Medically stable. - Medications stable over 3 months. - Appropriately signed and witnessed consent form. - Involvement/cooperation of informant/caregiver. Exclusion Criteria: - Medical/neurological condition (other than Alzheimer's disease) associated with dementia. - Brief Praxis Test score <20. - Modified Hachinski score >4. - Major depression within 3 months. - History of any disorder of blood coagulation (inherited or acquired). - Current use of anti-coagulants. - Use of experimental medications within 3 months. - Regular use of vitamin E greater than 50 units per day during the previous 6 months.

Additional Information

Official title Multicenter Vitamin E Trial in Aging Persons With Down Syndrome
Principal investigator Arthur J Dalton, PhD
Description The growing success of therapeutic interventions (including the antioxidant Vitamin E) for Alzheimer's disease in the general population requires a solution to the methodological problems so that therapeutic trials can be conducted in the aging population with Down syndrome which will ultimately improve their quality of life as well as that of their families and caregivers. The experience gained in this trial will be useful to the design of appropriate cognitive measures of Alzheimer's disease in persons with Down syndrome in subsequent trials. The goal of this international three-year study is to determine whether the administration of vitamin E, which has been shown to delay the progression of Alzheimer's disease, will slow the rate of cognitive/functional decline in persons age 50 or older with Down syndrome. Persons with Down syndrome functioning at all levels of intellectual disability will be eligible. Men and women of approximately equal numbers and people from minorities and ethnic groups other than Caucasian will be included. A total of 350 individuals with Down syndrome, 50 years of age and older, have been recruited at approximately 21 trial sites. The study is a randomized, double-blind, placebo-controlled, parallel group design with stratification by geographic site and presence of Alzheimer disease according to DSM-IV (American Psychiatric Association) criteria for diagnosing this disease. Apolipoprotein E (Apo E) genotype will be determined at the screening visit to allow secondary analyses of the impact of Apo E genotype (that may influence Alzheimer's disease risk) on outcome measures and the response to treatment. DNA specimens will also be stored for possible future genetic analyses, with trial sites allowing for non-participation in this procedure. Visits will occur at baseline and then at 6 monthly intervals, with each visit including interval medical history, current and interval medications, side effects checklist, adverse events, pill count, institutionalization status, cognitive, functional, and behavioral measures, and DSM-IV diagnostic assessment for Alzheimer's disease.
Trial information was received from ClinicalTrials.gov and was last updated in May 2012.
Information provided to ClinicalTrials.gov by New York State Institute for Basic Research.