Insomnia symptoms predict both future hypertension and depression

Area of Science:

• Gerontology
• Epidemiology
• Psychiatry

Background:

• Hypertension and depression are highly prevalent in older populations.
• Their comorbidity significantly increases morbidity and mortality.
• Risk factors for these conditions in older adults are not well understood.

Purpose of the Study:

• To investigate the hypothesis that increased insomnia symptoms predict incident hypertension and depression in older adults.
• To examine the relationship between insomnia symptoms and the development of hypertension and depression over time.

Main Methods:

• Longitudinal population-based study using data from the Health and Retirement Study (2008-2016).
• Included 18,123 community-dwelling older adults (aged 50+) without baseline hypertension or depression.
• Assessed insomnia symptoms and used Cox proportional hazards regression and Kaplan-Meier curves.

Main Results:

• Insomnia symptoms were significant predictors of incident hypertension (1.11[1.01, 1.21]) and depression (9.91[6.37, 15.41]) across all age groups.
• Systolic blood pressure (SBP) also predicted hypertension (1.02[1.01, 1.02]).
• Within 8 years, 9.2% of the cohort developed both conditions, with more insomnia symptoms correlating with higher incidence.

Conclusions:

• Insomnia symptoms are consistent predictors of future hypertension and depression in older individuals without baseline conditions.
• Insomnia may play a role in the etiology and comorbidity of hypertension and depression in the aging population.