Objective sleep characteristics and hypertension: a community-based cohort study

Area of Science:

• Sleep Science
• Cardiovascular Health
• Epidemiology

Background:

• The relationship between sleep quality and hypertension risk is established.
• Limited research exists on the dose-response between objective sleep metrics and hypertension incidence.

Purpose of the Study:

• To investigate the dose-response association between objective sleep characteristics and hypertension incidence.
• To explore how specific sleep stages influence the risk of developing hypertension.

Main Methods:

• Community-based prospective cohort study using Sleep Heart Health Study (SHHS) data.
• Inclusion of 2,460 individuals with objective sleep data via polysomnography (PSG).
• Multivariate logistic regression and restricted cubic splines (RCS) for dose-response analysis.

Main Results:

• Higher percentage of stage 2 sleep (N2%) positively correlated with hypertension incidence (OR=1.009).
• Higher percentage of stage 3 sleep (N3%) negatively correlated with hypertension incidence (OR=0.987).
• Non-linear relationships observed, with increased risk above 58% N2% and below 15% or above 40% N3%.

Conclusions:

• Objective sleep stage proportions, specifically N2% and N3%, are significantly associated with hypertension incidence.
• These associations are non-linear and particularly pronounced in individuals without depression.
• Findings highlight the importance of specific sleep stage durations in hypertension risk assessment.