The Sleep Heart Health Study: design, rationale, and methods

Area of Science:

• Cardiology
• Sleep Medicine
• Epidemiology

Background:

• Cardiovascular disease (CVD) is a leading cause of mortality.
• Sleep-disordered breathing (SDB), including obstructive sleep apnea (OSA), is increasingly recognized as a potential contributor to CVD.
• Existing cohort studies often lack comprehensive sleep data.

Purpose of the Study:

• To investigate the association between obstructive sleep apnea (OSA) and other sleep-disordered breathing (SDB) and the risk of developing cardiovascular disease.
• To leverage existing cohort data for comprehensive cardiovascular risk assessment.
• To determine the statistical power for assessing SDB as a risk factor for major cardiovascular events.

Main Methods:

• Prospective cohort study design.
• Enrollment of 6,600 adult participants aged 40 years and older.
• Home polysomnography to assess OSA and other SDB.
• Integration with existing large cohort studies (e.g., Atherosclerosis Risk in Communities Study, Cardiovascular Health Study).
• Utilizing pre-collected data on cardiovascular risk factors and outcomes.
• Periodic surveys for incidence and recurrence of cardiovascular events.

Main Results:

• The study is designed with sufficient statistical power to detect associations between SDB/OSA and cardiovascular events.
• Data collection focuses on major cardiovascular events, including myocardial infarction and stroke.

Conclusions:

• The Sleep Heart Health Study (SHHS) is well-positioned to clarify the role of SDB and OSA in cardiovascular disease etiology.
• Findings will inform clinical practice and public health strategies related to sleep health and cardiovascular risk management.