Scientific article
Open access

Characteristics of Severe Asthma Patients and Predictors of Asthma Control in the Swiss Severe Asthma Registry

Published inRespiration, vol. 102, no. 10, p. 863-878
First online date2023-09-28

Background: Asthma is a chronic airway disease, affecting over 300 million people worldwide. 5-10% of patients suffer from severe asthma and account for 50% of asthma-related financial burden. Availability of real-life data about the clinical course of severe asthma is insufficient.

Objectives: The aims of this study were to characterize patients with severe asthma in Switzerland, enrolled in the Swiss Severe Asthma Registry (SSAR), and evaluate predictors for asthma control.

Method: A descriptive characterisation of 278 patients was performed, who were prospectively enrolled in the registry until January 2022. Socio-demographic variables, comorbidities, diagnostic values, asthma treatment, and healthcare utilisation were evaluated. Groups of controlled and uncontrolled asthma according to the asthma control test were compared.

Results: Forty-eight percent of patients were female and the mean age was 55.8 years (range 13-87). The mean body mass index (BMI) was 27.4 kg/m2 (±6). 10.8% of patients were current smokers. Allergic comorbidities occurred in 54.3% of patients, followed by chronic rhinosinusitis (46.4%) and nasal polyps (34.1%). According to the ACT score, 54.7% had well controlled, 16.2% partly controlled and 25.9% uncontrolled asthma. The most common inhalation therapy was combined inhaled corticosteroids/long-acting β2-agonists (78.8%). Biologics were administered to 81.7% of patients and 19.1% received oral steroids. The multivariable analysis indicated that treatment with biologics was positively associated with asthma control whereas higher BMI, oral steroids, exacerbations, and COPD were negative predictors for asthma control.

Conclusion: Biologics are associated with improved control in severe asthma. Further studies are required to complete the picture of severe asthma in order to provide improved care for those patients.

  • Asthma control
  • Cohort
  • Predictors
  • Severe asthma
  • Administration, Inhalation
  • Adolescent
  • Adrenal Cortex Hormones / therapeutic use
  • Adult
  • Aged
  • Aged, 80 and over
  • Anti-Asthmatic Agents / therapeutic use
  • Asthma / drug therapy
  • Asthma / epidemiology
  • Biological Products / therapeutic use
  • Female
  • Humans
  • Male
  • Middle Aged
  • Steroids / therapeutic use
  • Switzerland / epidemiology
  • Young Adult
Citation (ISO format)
JAUN, Fabienne et al. Characteristics of Severe Asthma Patients and Predictors of Asthma Control in the Swiss Severe Asthma Registry. In: Respiration, 2023, vol. 102, n° 10, p. 863–878. doi: 10.1159/000533474
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Article (Published version)
ISSN of the journal0025-7931

Technical informations

Creation10/23/2023 8:29:00 AM
First validation11/16/2023 8:08:03 AM
Update time11/16/2023 8:08:03 AM
Status update11/16/2023 8:08:03 AM
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