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Milger K, Skowasch D, Hamelmann E, Mümmler C, Idzko M, Gappa M, Jandl M, Körner-Rettberg C, Ehmann R, Schmidt O, Taube C, Holtdirk A, Timmermann H, Buhl R, Korn S. Bronchodilator Reversibility in the GAN Severe Asthma Cohort. J Investig Allergol Clin Immunol 2023; 33:446-456. [PMID: 36000830 DOI: 10.18176/jiaci.0850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND AND OBJECTIVE Positive bronchodilator reversibility (BDR) is a diagnostic criterion for asthma. However, patients with asthma may exhibit a negative BDR response. Aim: To describe the frequency of positive and Negative BDR response in patients with severe asthma and study associations with phenotypic characteristics. METHODS A positive BDR response was defined as an increase in FEV1 >200 mL and >12% upon testing with a short-acting ß-agonist. RESULTS BDR data were available for 793 of the 2013 patients included in the German Asthma Net (GAN) severe asthma registry. Of these, 250 (31.5%) had a positive BDR response and 543 (68.5%) a egative BDR response. Comorbidities significantly associated with a negative response were gastroesophageal reflux disease (GERD) (28.0% vs 40.0%, P<.01) and eosinophilic granulomatosis with polyangiitis (0.4% vs 3.0%; P<.05), while smoking history (active: 2.8% vs 2.2%; ex: 40.0% vs 41.7%) and comorbid chronic obstructive pulmonary disease (COPD) (5.2% vs 7.2%) were similar in both groups. Patients with a positive BDR response had worse asthma control (median Asthma Control Questionnaire 5 score, 3.4 vs 3.0, P<.05), more frequently reported dyspnea at rest (26.8% vs 16.4%, P<.001) and chest tightness (36.4% vs 26.2%, P<.001), and had more severe airway obstruction at baseline (FEV1% predicted, 56 vs 64, P<.001) and higher fractional exhaled nitric oxide (FeNO) levels (41 vs 33 ppb, P<0.05). There were no differences in diffusion capacity of the lung for carbon monoxide, single breath (% pred, 70% vs 71%). Multivariate linear regression analysis identified an association between positive BDR response and lower baseline FEV1% (P<.001) and chest tightness (P<.05) and a negative association between BDR and GERD (P<.05). CONCLUSION In this real-life setting, most patients with severe asthma had a negative BDR response. Interestingly, this was not associated with smoking history or COPD, but with lower FeNO and presence of GERD.
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Affiliation(s)
- K Milger
- Department of Medicine V, University Hospital, LMU Munich, Munich, Germany
- Comprehensive Pneumology Center Munich (CPC-M), Member of the German Center for Lung Research, Munich, Germany
| | - D Skowasch
- Department of Internal Medicine II - Pneumology/Cardiology, University Hospital Bonn, Bonn, Germany
| | - E Hamelmann
- University Hospital for Pediatrics and Adolescent Medicine, Children´s Center Bethel, University of Bielefeld, Bielefeld, Germany
| | - C Mümmler
- Department of Medicine V, University Hospital, LMU Munich, Munich, Germany
- Comprehensive Pneumology Center Munich (CPC-M), Member of the German Center for Lung Research, Munich, Germany
| | - M Idzko
- Department of Pulmonary Medicine, Medical University of Vienna, Vienna, Austria
| | - M Gappa
- Evangelisches Krankenhaus Düsseldorf, Düsseldorf, Germany
| | - M Jandl
- Hamburger Institut für Therapieforschung, Hamburg, Germany
| | | | - R Ehmann
- Ambulante Pneumologie Stuttgart, Stuttgart, Germany
| | - O Schmidt
- Pneumologische Gemeinschaftspraxis Koblenz, Koblenz, Germany
| | - C Taube
- Department of Pulmonary Medicine, University Hospital - Ruhrlandklinik, Essen, Germany
| | | | | | - R Buhl
- Pulmonary Department, Mainz University Hospital, Mainz, Germany
| | - S Korn
- IKF Pneumologie Mainz, Mainz, Germany
- Thoraxklinik Heidelberg, Heidelberg, Germany
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