• C J Weatherburn, B Guthrie, S W Mercer, and D R Morales.
• Division of Population Health Sciences, School of Medicine, University of Dundee, Dundee, UK.
• Clin. Exp. Allergy. 2017 Oct 1; 47 (10): 1246-1252.

BackgroundComorbidity in people with asthma can significantly increase asthma morbidity and lower adherence to asthma guidelines.ObjectiveThe objective of this study was to comprehensively measure the prevalence of physical and mental health comorbidities in adults with asthma using a large nationally representative population.MethodsCross-sectional analysis of routine primary care electronic medical records for 1 424 378 adults in the UK, examining the prevalence of 39 comorbidities in people with and without asthma, before and after adjustment for age, sex, social deprivation and smoking status using logistic regression.ResultsOf 39 comorbidities measured, 36 (92%) were significantly more common in adults with asthma; 62.6% of adults with asthma had ≥1 comorbidity vs 46.2% of those without, and 16.3% had ≥4 comorbidities vs 8.7% of those without. Comorbidities with the largest absolute increase in prevalence in adults with asthma were as follows: chronic obstructive pulmonary disease (COPD) (13.4% vs 3.1%), depression (17.3% vs 9.1%), painful conditions (15.4% vs 8.4%) and dyspepsia (10.9% vs 5.2%). Comorbidities with the largest relative difference in adults with asthma compared to those without were as follows: COPD (adjusted odds ratio [aOR] 5.65, 95% CI 5.52-5.79), bronchiectasis (aOR 4.65, 95% CI 4.26-5.08), eczema/psoriasis (aOR 3.30, 95% CI 3.14-3.48), dyspepsia (aOR 2.20, 95% CI 2.15-2.25) and chronic sinusitis (aOR 2.12, 95% CI 1.99-2.26). Depression and anxiety were more common in adults with asthma (aOR 1.60, 95% CI 1.57-1.63, and aOR 1.53, 95% CI 1.48-1.57, respectively).Conclusions And Clinical RelevancePhysical and mental health comorbidities are the norm in adults with asthma. Appropriate recognition and management should form part of routine asthma care.© 2017 John Wiley & Sons Ltd.

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