The Wisconsin Sleep Cohort (WSC) Study is an ongoing observational, longitudinal study of the causes, consequences, and natural history of sleep behaviors and sleep disorders, with a historical focus on sleep apnea and a more recent focus on sleep (multidimensional) and aging. WSC Study data include multiple overnight in-laboratory sleep studies, conducted with a baseline sample of approximately 1,500 Wisconsin state employees, with repeated studies at approximate four-year intervals, as well as mailed survey data collected from approximately 2,400 study participants.
With approximately 100 publications, the WSC Study has produced seminal findings on the wide prevalence of sleep apnea; the longitudinal associations of sleep apnea with cardiovascular, mental health, and mortality outcomes; and risk factors for sleep disorders including weight gain, the menopausal transition, and alcohol use. Other WSC Study publications have focused on sleep behaviors, quality and duration; investigations have included, for example, associations between hypersomnolence and depression; napping and retirement status; physical activity and sleep quality; social support and sleep duration. The WSC Study also maintains multiple national and international collaborations related to basic science and population-level sleep research.
Learn more about the history and research of the Wisconsin Sleep Cohort Study here.