Cohort profile: Wisconsin longitudinal study (WLS)

Area of Science:

• Sociology
• Psychology
• Genetics
• Public Health
• Gerontology

Background:

• The Wisconsin Longitudinal Study (WLS) is a long-term study of individuals who graduated from Wisconsin high schools in 1957 and their siblings.
• The study spans nearly six decades, offering a rich dataset for analyzing life course influences on health and well-being.
• It is one of the few longitudinal datasets including childhood cognitive measures and recent genetic data.

Purpose of the Study:

• To examine the long-term effects of family background, education, and socioeconomic factors on midlife and late-life health, cognition, and mortality.
• To investigate the interplay between genes, behavior, and environment, including genetic predispositions and their interaction with environmental factors.
• To provide a comprehensive resource for researchers studying human development, health outcomes, and aging.

Main Methods:

• Longitudinal data collection over almost 60 years, including interviews and administrative records.
• Inclusion of sibling pairs to control for shared family background and genetic factors.
• Analysis of diverse data types: family history, adolescent traits, education, employment, income, wealth, family formation, social engagement, health, cognition, and mortality.
• Incorporation of genetic data from saliva samples to explore gene-environment interactions.

Main Results:

• Established links between early life factors and later-life health, psychological well-being, and cognitive function.
• Identified predictors of educational attainment, employment success, and family formation.
• Demonstrated the utility of administrative cognitive measures and genetic data in understanding behavioral outcomes.
• Provided insights into the complex relationships between genetics, environment, and behavior across the lifespan.

Conclusions:

• The WLS provides invaluable insights into the determinants of health, behavior, and aging over a near lifetime.
• Gene-environment interactions play a significant role in shaping individual behaviors and life outcomes.
• The study's publicly accessible data supports ongoing research in multiple scientific disciplines.