Do nocturnal asthma attacks influence sleep parameters and inflammatory markers? A cross-sectional population-based...

Area of Science:

• Pulmonology
• Sleep Medicine
• Epidemiology

Background:

• Nocturnal asthma symptoms can significantly impact sleep quality and daytime function.
• The relationship between asthma severity, sleep disturbances, and inflammatory markers requires further investigation.

Purpose of the Study:

• To assess the effects of nocturnal asthma severity on sleep parameters and inflammatory markers.
• To explore the association between nocturnal asthma and obstructive sleep apnea (OSA).

Main Methods:

• Utilized data from the São Paulo Epidemiologic Sleep Study (EPISONO) editions (2007, 2018).
• Collected data through validated questionnaires, nocturnal polysomnography, spirometry, and blood sample analysis for inflammatory markers.
• Categorized participants based on intermittent versus persistent nocturnal asthma symptoms (mild, moderate, severe).

Main Results:

• Participants with persistent nocturnal asthma exhibited higher BMI, more respiratory symptoms, worse lung function, and elevated apnea-hypopnea index (AHI) and desaturation index compared to those with intermittent symptoms.
• A significant association was found between nocturnal asthma and OSA, with a higher prevalence of OSA in persistent asthma cases.
• No significant differences in immunological parameters were observed between intermittent and persistent nocturnal asthma groups.

Conclusions:

• Nocturnal asthma symptoms serve as a crucial indicator of overall asthma severity.
• The study reinforces the link between nocturnal asthma and OSA, underscoring the importance of evaluating sleep in asthma management.