Update on the NAS-NRC Twin Registry

Area of Science:

• Gerontology and Epidemiology
• Twin Studies and Population Health

Background:

• The National Academy of Sciences-National Research Council (NAS-NRC) Twin Registry is a significant, long-standing U.S. population-based resource.
• It comprises 15,924 white male twin pairs born between 1917-1927, with military service history, primarily in World War II.

Purpose of the Study:

• To provide an update on research activities and findings from the NAS-NRC Twin Registry since 2002.
• To highlight ongoing and planned studies utilizing registry data for health and aging research.

Main Methods:

• Analysis of clinically based studies on conditions including dementia, Parkinson's disease, age-related macular degeneration, and osteoarthritis.
• Review of published articles derived from questionnaire data on chronic fatigue syndrome, functional limitations, and healthy aging.
• Integration of National Heart, Lung, and Blood Institute (NHLBI) twin examination data, including hormonal influences on coronary heart disease and brain morphology.

Main Results:

• Published findings from clinical studies and questionnaire data on various age-related diseases and conditions.
• Research exploring the link between sex hormones and coronary heart disease in aging male twins.
• Introduction of the NEO Five-Factor Personality Inventory to the registry data collection.

Conclusions:

• The NAS-NRC Twin Registry remains a valuable resource for understanding aging, disease etiology, and risk factors.
• Ongoing efforts focus on data consolidation and merging clinical and questionnaire data for future risk factor studies.
• The registry facilitates diverse research, from specific diseases to personality traits and healthy aging.