Uniform definition of asthma severity, control, and exacerbations: Document presented for the World Health Organization Consultation on Severe Asthma (original) (raw)
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Severe asthma: Comparison of different classifications of severity and control
Respiratory Medicine, 2019
Background: Criteria of asthma severity and control lack standardization. Objective: to compare classifications of asthma severity and control, applied to patients from a severe asthma clinic. Methods: Cross-sectional study of 473 patients followed up for ≥6 months, reclassified using three criteria: 1) the World Health Organization (WHO) 2010, 2) the American Thoracic Society (ATS) 2000, and 3) the European Respiratory Society (ERS)/ATS 2014. In order to evaluate disease control, the 2012 and 2014 Global Initiative for Asthma (GINA) classifications were compared. Results: According to the definition of WHO 2010, 429 had Difficult-to-treat severe asthma and only 12 presented Treatment-resistant severe asthma. 114 patients had Refractory asthma by ATS 2000 and 88 had Severe asthma by ERS/ATS 2014. Considering the definitions of WHO 2010, only 9 out of 12 with Treatment-resistant and 64 out of 429 with Difficult-to-treat severe asthma met the criteria of ATS 2000 and ERS/ATS 2014. As for GINA classification of control, 208 (44%) of the 473 subjects were classified as having asthma controlled by the 2014 criteria, whereas only 45 (10%) patients had controlled asthma by the GINA 2012 criteria. The Kappa statistic indicates the highest agreement of the severity classification occurred between the criteria of ATS 2000 and ERS/ATS 2014 (0.64).
A new perspective on concepts of asthma severity and control
European Respiratory Journal, 2008
Concepts of asthma severity and control are important in the evaluation of patients and their response to treatment but the terminology is not standardised and the terms are often used interchangeably. This review, arising from the work of an American Thoracic Society/European Respiratory Society Task Force, identifies the need for separate concepts of control and severity, describes their evolution in asthma guidelines and provides a framework for understanding the relationship between current concepts of asthma phenotype, severity and control.
Impact of asthma severity on long-term asthma control
Journal of Asthma, 2020
Background: Asthma is a common childhood disease with significant morbidity. Severe asthma accounts for just 4-6% of patients, but this group is more difficult to treat and is responsible for up to 40% of asthma expenses. Objective: The relationship between asthma severity and control is not well characterized. The main objective of this study was to determine impact of asthma severity on asthma control over time. Methods: This was a three year, prospective observational cohort study at a tertiary care children's hospital. Results were compared over time and between patients with severe and non-severe persistent asthma. Intervention included therapy based on severity and control, accompanied by a NAEPP (EPR-3) guidelines based structured asthma education program. Results: The sample included 471 children referred from primary care offices with the diagnosis of persistent asthma, mean age 6.4±2.4 years. Forty-one children (8.7%) had severe persistent asthma and 430 (91.3%) children had non-severe persistent asthma (mild-moderate persistent). Our sample size decreased over the three-year period and the number of patients completing the 3 rd year were 176 (38%) and among them 20 (11.4%) had severe asthma. At the initial visit, children with severe persistent asthma had significantly more acute care needs, more daily symptoms, and lower mean Asthma Control Test™ scores compared to children with non-severe persistent asthma. Differences between groups decreased within six months with significant improvements in most indicators persisting throughout three-year follow up in both groups (p<0.05). Conclusion: Asthma control improves independent of severity if asthma guidelines are followed.
Overview of changes to asthma guidelines: diagnosis and screening
American family physician, 2009
The Expert Panel Report 3 of the National Asthma Education and Prevention Program represents a major advance in the approach to asthma care by emphasizing the monitoring of clinically relevant aspects of care and the importance of planned primary care, and by providing patients practical tools for self-management. Treatment of asthma should be guided by a new system of classification that assesses severity at initial evaluation and control at all subsequent visits. Asthma severity is determined by current impairment (as evidenced by impact on day-to-day activities) and risk of future exacerbations (as evidenced by frequency of oral systemic corticosteroid use), and allows categorization of disease as intermittent, persistent-mild, persistent-moderate, and persistent-severe. Initial treatment is guided by the disease-severity category. The degree of control is also determined by the analysis of current impairment and future risk. Validated questionnaires can be used for following the...
Tanaffos, 2015
Challenges in the assessment, diagnosis and management of severe, difficult-to-control asthma are increasingly regarded as clinical needs yet unmet. The assessments required to determine asthma severity, comorbidities and confounding factors, disease phenotypes and optimal treatment are among the controversial issues in the field. The respiratory care experts' input forum (RC-EIF), comprised of an Iranian panel of experts, reviewed the definition, appraised the available guidelines and provided a consensus for evaluation and treatment of severe asthma in adults. A systematic literature review followed by discussions during and after the forum, yielded the present consensus. The expert panel used the appraisal of guidelines for research and evaluation-II (AGREE-II) protocol to define an initial locally-adapted strategy for the management of severe asthma. Severe asthma is considered a heterogeneous condition with various phenotypes. Issues such as assessment of difficult-to-contr...