Sleep disordered breathing in the elderly: a three year longitudinal cohort study.

Area of Science:

• Gerontology
• Sleep Medicine
• Cardiorespiratory Health

Background:

• Sleep disordered breathing (SDB) is prevalent but its long-term impact on elderly individuals without prior diagnosis is not fully understood.
• Assessing the association between SDB and clinical outcomes like mortality and hospitalization is crucial for geriatric care.

Purpose of the Study:

• To investigate the relationship between sleep disordered breathing (SDB) and daytime sleepiness, body mass index, hospitalization duration, and survival rates in elderly patients.
• To determine if SDB predicts adverse outcomes in older adults admitted to a hospital setting.

Main Methods:

• A prospective longitudinal study followed 80 elderly patients (age >65) admitted to a German hospital, initially without SDB history.
• Data collected included anthropometrics, cardiorespiratory parameters via portable polygraphy, and Epworth Sleepiness Scale (ESS) scores.
• Patients were categorized into SDB (Apnea-Hypopnea Index [AHI] ≥5 and ESS >9) and no SDB groups for a 3-year follow-up.

Main Results:

• 33% of patients with SDB died during follow-up compared to 20% without SDB, indicating a 1.5-fold higher mortality risk.
• Patients with SDB experienced longer hospital stays (35 days) versus those without SDB (20 days).
• Daytime sleepiness (ESS) was a more significant predictor of mortality than AHI or BMI.

Conclusions:

• Sleep disordered breathing (SDB) is associated with increased mortality and prolonged hospitalization in elderly individuals over a 3-year period.
• Even in elderly patients without a prior SDB diagnosis, its presence poses significant health risks.
• Excessive daytime sleepiness is a critical indicator for mortality risk in this population.