Sleep parameters in patients with chronic hypersensitivity pneumonitis: a case-control study

Area of Science:

• Pulmonary Medicine
• Sleep Medicine
• Respiratory Physiology

Background:

• Chronic hypersensitivity pneumonitis (cHP) is a lung disease that can affect sleep quality.
• Obstructive sleep apnea (OSA) and nocturnal hypoxemia are common sleep-related breathing disorders.
• Understanding sleep characteristics in cHP patients is crucial for comprehensive patient care.

Purpose of the Study:

• To compare sleep characteristics between patients with cHP and healthy controls.
• To determine the prevalence of OSA and nocturnal hypoxemia in cHP patients.
• To identify factors associated with OSA and hypoxemia and evaluate sleep questionnaire accuracy for OSA prediction in cHP.

Main Methods:

• 40 cHP patients were matched with 80 controls based on sex, age, and BMI.
• Participants completed various sleep questionnaires (STOP-Bang, ESS, PSQI, Berlin, NoSAS).
• Full-night polysomnography was performed on all participants to assess sleep and breathing.

Main Results:

• cHP patients exhibited poorer sleep efficiency, longer sleep latency, and reduced respiratory disturbance index compared to controls.
• Patients with cHP had significantly lower nocturnal oxygen saturation (SpO2) and a higher percentage of sleep time below 90% SpO2.
• No significant differences in questionnaire scores were found between cHP patients with and without OSA.

Conclusions:

• The prevalence of OSA in cHP patients is high but not significantly different from controls.
• cHP patients experience more nocturnal hypoxemia than individuals with normal spirometry.
• Sleep questionnaires lack sufficient accuracy to predict OSA in patients with cHP.