Obstructive sleep apnoea and lung function, and their association with nocturnal hypoxemia: results from the Swedish CArdioPulmonary bioimage Study (SCAPIS) - a cross-sectional study.
Baz Delshad, Mirjam Ljunggren, Xing Wu Zhou, J Theorell-Haglöw, Christer Janson, Ding Zou, Jan Hedner, Ludger Grote, Anders Blomberg, Karl Franklin, Carlin Sahlin, Andrei Malinovschi, Eva Lindberg
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引用次数: 0
Abstract
Obstructive sleep apnoea (OSA) and its associations with lung function.
Background: OSA is highly prevalent and characterised by abnormal respiration during sleep. This large, population-based study aimed to investigate the associations between OSA and lung function in subjects aged 50-64 years.
Method: The population-based Swedish CArdioPulmonary bioimage Study includes information on anthropometry, comorbidities and spirometry. The current analysis included data from three centres (Gothenburg, Umeå and Uppsala) on whole-night respiratory polygraphy as a meta-analysis examining the overall effect size of lung function on sleep apnoea severity, expressed as ß-coefficient after stratifying for sex and adjusting for age, waist circumference and smoking status.
Results: Data from 9016 participants (54% women, age 58±4 years, body mass index 27±4 kg/m2 ) with sleep recordings of good quality were included in the final analysis. Forced expiratory volume during 1 s (FEV 1 ) (ß=-0.10 (95% CI -0.16 to -0.03)), forced vital capacity (FVC) (-0.15 (-0.21 to -0.10)) and diffusion capacity for carbon monoxide (DLCO ) (-0.08 (-0.10 to -0.05)) were all negatively associated with the oxygen desaturation index (ODI) and also with per cent of registration with nocturnal oxygen saturation <90% FVC (-0.44 (-0.87 to -0.01)), FEV 1 (-0.86 (-1.36 to -0.36)) and DL CO (-0.47 (-0.60 to -0.35)). Additionally, a positive association was observed between FEV 1 (0.13 (0.05 to 0.22)) and DL CO (0.07 (0.04 to 0.09)) with the mean nocturnal saturation. There was a negative association between DL CO and apnoea-hypopnoea index, AHI, (ß=-0.04 (95% CI-0.06 to -0.03)), while no associations were found between FEV 1 or FVC and AHI.
Conclusion: In OSA, lower lung function is more distinctly associated with the nocturnal hypoxic burden than AHI. Potential lung function impairment should be investigated in OSA patients with a high ODI relative to AHI.
期刊介绍:
BMJ Open is an online, open access journal, dedicated to publishing medical research from all disciplines and therapeutic areas. The journal publishes all research study types, from study protocols to phase I trials to meta-analyses, including small or specialist studies. Publishing procedures are built around fully open peer review and continuous publication, publishing research online as soon as the article is ready.