Aging Clinical Trial
Official title:
COcoa Supplement and Multivitamin Outcomes Study-Mind
The parent trial (COcoa Supplement and Multivitamin Outcomes Study, COSMOS; NCT02422745) is a randomized clinical trial of cocoa extract supplement (containing a total of 500 mg/d flavanols, including 80 mg. (-)-epicatechins), and a standard multivitamin supplement to reduce the risk of cardiovascular disease and cancer among men aged 60 years and older and women aged 65 years and older. A cognitive ancillary study (COSMOS-Mind) is being conducted among men and women, 65 years and older, who are enrolled in COSMOS and will examine whether the cocoa extract supplement or the multivitamin supplement improves cognitive function and reduces risk of cognitive impairment, including Alzheimer's disease (AD) and other related types of dementia. Participants at the Wake Forest site will only be getting a phone call.
Identifying a safe, affordable, and well-tolerated intervention that prevents cognitive decline in older adults is of critical public health importance. There is compelling evidence from basic science, and small clinical studies that cocoa flavanols may protect cognitive function in older adults and reduce risk of Alzheimer's disease (AD) and related dementia. Thus, this intervention could have important downstream benefits for health care utilization and cost, caregiver burden, and overall quality of life for older adults. Cocoa flavanol effects on cognition, however, need to be assessed in a definitive clinical trial. The parent trial (COSMOS) will enroll 21,442 women and men nationwide, drawn from the Women's Health Initiative (WHI) participant cohort and the VITamin D and OmegA-3 TriaL (VITAL) non-randomized respondent cohort, and will be conducted primarily by mail to assess whether high-potency cocoa flavanol extract and a multivitamin - alone or in combination - will reduce risk of cardiovascular disease and cancer over 3 years of follow-up. After the COSMOS trial began, an advanced method to analyze cocoa flavanols was accredited by Association of Official Agricultural Chemists (AOAC) International as a First Action Official Method of Analysis https://doi.org/10.1093/jaoacint/qsaa132 [secure-web.cisco.com]). This updated method relies on a reference material (RM8403) recently standardized and made commercially available by the U.S. National Institute of Standards and Technology. While the actual cocoa flavanol content of the COSMOS intervention remained unchanged throughout the trial, the application of this new analytical method led to expected changes in how the total cocoa flavanol content is now reported. Applying AOAC 2020.05/RM8403 to the COSMOS intervention, the total cocoa flavanol content of the COSMOS intervention is now 500 mg/day. Reporting of (-)-epicatechin content remained unaffected. Going forward, this record will therefore apply AOAC 2020.05/RM8403 and report that the COSMOS intervention tested 500 mg/day of cocoa flavanols, including 80 mg of (-)-epicatechin. Once participants are enrolled in COSMOS, the study team at Brigham and Women's Hospital will provide contact information and other parent trial outcomes for COSMOS-Mind participants to the Wake Forest team using a secure web-based data transfer system. This seamless exchange of information between sites will permit timely accounting to ensure that the targeted demographics for enrollment are achieved (e.g. gender, age, race, ethnicity). COSMOS-Mind will only be administered a telephone cognitive assessment to all participants at enrollment (baseline), and annually for 3 years of follow-up by trained and certified staff of the Wake Forest COSMOS-Mind team. ;
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