Background Clinical characteristics of the international population with severe asthma are
unknown. Intercountry comparisons are hindered by variable data collection within regional …

Background Severe asthma exerts a disproportionately heavy burden on patients and health
care. Due to the heterogeneity of the severe asthma population, many patients need to be …

Background Severe asthma is a considerable challenge for patients, health‐care
professionals and society. Few studies have estimated the prevalence of severe asthma …

Aim The International Severe Asthma Registry (ISAR; http://isaregistries. org/) uses
standardised variables to enable multi-country and adequately powered research in severe …

Background The lack of centralized data on severe asthma has resulted in a scarcity of
information about the disease and its management. The development of a common data …

Background The UK Severe Asthma Registry (UKSAR) is the world's largest national severe
asthma registry collecting standardised data on referrals to UK specialist services. Novel …

Little is known about the characteristics and treatments of patients with severe asthma
across Europe, but both are likely to vary. This is the first study in the European Respiratory …

Purpose Current guidelines primarily use medication levels to distinguish severe asthma
from other types of asthma. In addition, severe asthma must also be uncontrolled at high …

Background: The severe asthma and severe, uncontrolled asthma (SUA) populations in
Japan are not well-studied. We investigated the prevalence of continuously treated severe …

Background Severe asthma is characterized by difficulty to achieve disease control despite
high-intensity treatment. However, prevalence figures of severe asthma are lacking …