Association Between Sleep Microstructure and Incident Hypertension in a Population-Based Sample: The HypnoLaus Study

Area of Science:

• Sleep science
• Cardiovascular health
• Neurophysiology

Background:

• Poor sleep quality is a known risk factor for hypertension.
• Limited research exists on the impact of objective sleep structure on hypertension development.

Purpose of the Study:

• To investigate the association between sleep macrostructure and microstructure parameters and incident hypertension.
• To analyze objective sleep features using polysomnography in a middle- to older-aged cohort.

Main Methods:

• Utilized polysomnography to assess sleep macrostructure and microstructure in 1172 participants without baseline hypertension.
• Employed multiple-adjusted logistic regression to analyze associations with incident hypertension over a 5.2-year follow-up.

Main Results:

• No significant associations were found between sleep macrostructure and incident hypertension.
• Lower absolute delta and sigma power in non-rapid eye movement sleep were linked to increased hypertension risk (OR 1.69-1.72).
• Reduced sleep spindle density (OR 0.87) and amplitude (OR 0.98) were also associated with higher incident hypertension.

Conclusions:

• Sleep microstructure, specifically slow-wave activity and sleep spindles, is significantly associated with incident hypertension.
• These findings highlight the protective role of objective sleep continuity and quality in preventing hypertension development.