Abstract:
BACKGROUND:Although the prevalence of both obstructive sleep apnoea (OSA) and asthma are both increasing, little is known about the impact of OSA on the natural history of lung function in asthmatic patients. METHODS:A total of 466 patients from our sleep laboratory were retrospectively enrolled. Of them, 77 patients (16.5%) had asthma with regular follow-up for more than 5 years. Their clinical characteristics, pulmonary function, emergency room visits, and results of polysomnography results were analysed. RESULTS:The patients were divided into three groups according to the severity of the apnoea-hypopnea index (AHI). The decline in FEV1 among asthma patients with severe OSA (AHI > 30/h) was 72.4 ± 61.7 ml/year (N = 34), as compared to 41.9 ± 45.3 ml/year (N = 33, P = 0.020) in those with mild to moderate OSA (5 < AHI ≤ 30) and 24.3 ± 27.5 ml/year (N = 10, P = 0.016) in those without OSA (AHI ≤ 5). For those patients with severe OSA, the decline of FEV1 significantly decreased after continuous positive airway pressure (CPAP) treatment. After multivariate stepwise linear regression analysis, only AHI was remained independent factor for the decline of FEV1 decline. CONCLUSIONS:Asthmatic patients with OSA had substantially greater declines in FEV1 than those without OSA. Moreover, CPAP treatment alleviated the decline of FEV1 in asthma patients with severe OSA.
journal_name
BMC Pulm Medjournal_title
BMC pulmonary medicineauthors
Wang TY,Lo YL,Lin SM,Huang CD,Chung FT,Lin HC,Wang CH,Kuo HPdoi
10.1186/s12890-017-0398-2subject
Has Abstractpub_date
2017-03-21 00:00:00pages
55issue
1issn
1471-2466pii
10.1186/s12890-017-0398-2journal_volume
17pub_type
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