Caillaud , D., Chanez , Pascal, Escamilla , R., Burgel , P-R., Court-Fortune , I., Nesme-Meyer , P., Deslée , G., Perez , T., Paillasseur , J-L., Pinet , C., Jebrak , G., Roche , N., investigators , Initiatives BPCO scientific committee and, CHU Gabriel Montpied ( CHU ), CHU Clermont-Ferrand, Adhésion et Inflammation ( LAI ), Assistance Publique - Hôpitaux de Marseille ( APHM ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Aix Marseille Université ( AMU ) -Centre National de la Recherche Scientifique ( CNRS ), Service de pneumologie [Toulouse], CHU Toulouse [Toulouse]-Hôpital Larrey, Service de pneumologie [CHU Cochin], Assistance publique - Hôpitaux de Paris (AP-HP)-CHU Cochin [AP-HP], Service de Pneumologie [Saint-Etienne], CHU Saint-Etienne, Hôpital de la Croix-Rousse [CHU - HCL], Hospices Civils de Lyon ( HCL ), Hôpital Maison Blanche, Centre Hospitalier Universitaire de Reims ( CHU Reims ), Pathologies Pulmonaires et Plasticité Cellulaire - UMR-S 1250 ( P3CELL ), Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université de Reims Champagne-Ardenne ( URCA ), Hôpital Albert Calmette, Université de Lille, Droit et Santé-Centre Hospitalier Régional Universitaire [Lille] ( CHRU Lille ), EFFI-STAT, Polyclinique Les Fleurs, Service de pneumologie B, Assistance publique - Hôpitaux de Paris (AP-HP)-AP-HP - Hôpital Bichat - Claude Bernard [Paris]-Université Paris Diderot - Paris 7 ( UPD7 ), CHU Gabriel Montpied [Clermont-Ferrand], Adhésion et Inflammation (LAI), Assistance Publique - Hôpitaux de Marseille (APHM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), CHU Toulouse [Toulouse]-Hôpital Larrey [Toulouse], CHU Toulouse [Toulouse], Hôpital Cochin [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Hospices Civils de Lyon (HCL), Centre Hospitalier Universitaire de Reims (CHU Reims), Pathologies Pulmonaires et Plasticité Cellulaire - UMR-S 1250 (P3CELL), Université de Reims Champagne-Ardenne (URCA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Lille, Droit et Santé-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-AP-HP - Hôpital Bichat - Claude Bernard [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Diderot - Paris 7 (UPD7), Aix Marseille Université (AMU)-Assistance Publique - Hôpitaux de Marseille (APHM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Universitaire de Toulouse (CHU Toulouse), Service de Pneumologie et Oncologie thoracique [CHU Saint-Etienne], Centre Hospitalier Universitaire de Saint-Etienne [CHU Saint-Etienne] (CHU ST-E)-Université Jean Monnet - Saint-Étienne (UJM), Université Paris Diderot - Paris 7 (UPD7)-AP-HP - Hôpital Bichat - Claude Bernard [Paris], CHU Gabriel Montpied (CHU), Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Cochin [AP-HP], and Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-AP-HP - Hôpital Bichat - Claude Bernard [Paris]-Université Paris Diderot - Paris 7 (UPD7)
International audience; BACKGROUND:Some studies suggest that asthma-COPD overlap syndrome (ACOS) is associated with worse outcomes than chronic obstructive pulmonary disease (COPD). The goal of this study was to further explore the clinical characteristics and survival of patients with ACOS identified in a real-life cohort of patients with COPD.METHODS:Data from the French COPD cohort 'INITIATIVES BronchoPneumopathie Chronique Obstructive' (n = 998 patients) were analyzed to assess the frequency of ACOS defined as a physician diagnosis of asthma before the age of 40 years and to analyze its impact. Univariate analyses were performed to assess the relationship between ACOS and sociodemographic characteristics, risk factors (smoking, occupational exposure, atopic diseases), symptoms (chronic bronchitis, dyspnea-modified Medical Research Council scale and baseline dyspnea index), quality of life (QoL), mood disorders, exacerbations, comorbidities, lung function, prescribed treatment, and survival.RESULTS:ACOS was diagnosed in 129 patients (13%). In multivariate analyses, ACOS was associated negatively with cumulative smoking (odds ratio [OR]: 0.992; 95% CI 0.984-1.000 per pack-year) and positively with obesity: OR: 1.97 [1.22-3.16], history of atopic disease (hay fever: OR: 5.50 [3.42-9.00] and atopic dermatitis: OR 3.76 [2.14-6.61]), and drug use (LABA + ICS: 1.86 [1.27-2.74], antileukotrienes 4.83 [1.63-14.34], theophylline: 2.46 [1.23-4.91], and oral corticosteroids: [2.99;.1.26-7.08]). No independent association was found with dyspnea, QoL, exacerbations, and mortality.CONCLUSIONS:Compared to 'pure' COPD patients, patients with ACOS exhibit lower cumulative smoking, suffer more from obesity and atopic diseases, and use more asthma treatments. Disease severity (dyspnea, QoL, exacerbations, comorbidities) and prognosis (mortality) are not different from 'pure' COPD patients.