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Rigshospitalet - en del af Københavns Universitetshospital
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Differentiation of adult severe asthma from difficult-to-treat asthma - Outcomes of a systematic assessment protocol

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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  • Anna von Bülow
  • Vibeke Backer
  • Uffe Bodtger
  • Niels Ulrik Søes-Petersen
  • Susanne Vest
  • Ida Steffensen
  • Celeste Porsbjerg
Vis graf over relationer

BACKGROUND: Guidelines recommend a differentiation of difficult-to-treat asthma from severe asthma. However, this might be complex and to which extent this distinction is achievable in clinical practice remains unknown.

OBJECTIVE: To evaluate to which degree a systematic evaluation protocol enables a differentiation between severe versus difficult-to-treat asthma in patients in specialist care on high intensity asthma treatment, i.e. potentially severe asthma.

METHODS: All adult asthma patients seen in four respiratory clinics over one year were screened prospectively for asthma severity. Patients with difficult-to-control asthma according to ERS/ATS criteria (high-dose inhaled corticosteroids/oral corticosteroids) underwent systematic assessment to differentiate severe asthma patients from those with other causes of poor asthma control: objective confirmation of the asthma diagnosis as well as assessment of treatment barriers and comorbidities.

RESULTS: Overall, 1034 asthma patients were screened, of whom 175 (16.9%) had difficult-to-control asthma. 117 of these accepted inclusion, and completed systematic assessment. Asthma diagnosis was objectively confirmed in 88%. Sub-optimal adherence (42.5%), inhaler errors (31.5%) and unmanaged comorbidities (66.7%) were common. After primary assessment, 12% (14/117) fulfilled strict criteria for severe asthma. Moreover, 56% (66/117) were instantly classified as difficult-to-treat asthma due to poor adherence/inhaler technique. Finally, an ´overlap' group of 32% (37/117) were identified with patients being adherent and displaying correct inhaler technique, but had unmanaged comorbidities -potentially fitting into both the difficult-to-treat and severe group.

CONCLUSION: Only a minority of patients with difficult-to-control asthma were found to have severe asthma after primary systematic assessment. Nevertheless, strict categorisation of severe vs. difficult-to-treat asthma seems to pose a challenge.

OriginalsprogEngelsk
TidsskriftRespiratory medicine
Vol/bind145
Sider (fra-til)41-47
Antal sider7
ISSN0954-6111
DOI
StatusUdgivet - dec. 2018

ID: 55767518