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Obstructive sleep apnoea accelerates FEV1 decline in asthmatic patients
Tsai-Yu Wang1, Yu-Lun Lo1, Shu-Min Lin1
1Pulmonary Disease Research Centre, Department of Thoracic Medicine, Chang Gung Memorial Hospital, Chang Gung University, School of Medicine, 199 Tun-Hwa N. Rd., Taipei, Taiwan.
Obstructive sleep apnoea (OSA) significantly accelerates lung function decline in asthma patients. Continuous positive airway pressure (CPAP) treatment can mitigate this decline, particularly in severe OSA cases.
Area of Science:
- Pulmonology
- Sleep Medicine
Background:
- Increasing prevalence of both obstructive sleep apnoea (OSA) and asthma.
- Limited understanding of OSA's impact on lung function in asthma patients.
Purpose of the Study:
- To investigate the effect of OSA severity on lung function decline in asthma patients.
- To evaluate the efficacy of continuous positive airway pressure (CPAP) treatment in mitigating lung function decline in asthmatic patients with OSA.
Main Methods:
- Retrospective analysis of 466 patients from a sleep laboratory.
- Focus on 77 asthma patients with over 5 years of follow-up.
- Categorization into groups based on apnoea-hypopnea index (AHI) severity.
Main Results:
- Asthma patients with severe OSA (AHI > 30/h) showed a significantly greater decline in FEV1 (72.4 ml/year) compared to those with mild-to-moderate OSA (41.9 ml/year) or no OSA (24.3 ml/year).
- Continuous positive airway pressure (CPAP) treatment led to a significant reduction in FEV1 decline among patients with severe OSA.
- Apnoea-hypopnea index (AHI) was identified as the sole independent factor influencing FEV1 decline.
Conclusions:
- Asthma patients with OSA experience accelerated lung function decline.
- CPAP therapy is effective in reducing FEV1 decline in severe OSA patients with asthma.
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