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Oral corticosteroid use, morbidity and mortality in asthma: A nationwide prospective cohort study in Sweden
Lund Univ, Fac Med, Dept Clin Sci Lund, Resp Med & Allergol, Lund, Sweden.
Univ Gothenburg, Krefting Res Ctr, Inst Med, Gothenburg, Sweden;Univ Gothenburg, Wallenberg Ctr Mol & Translat Med, Sweden.ORCID iD: 0000-0002-2876-6089
AstraZeneca Nordic Baltic, Sodertalje, Sweden.
Statisticon AB, Uppsala, Sweden.
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2019 (English)In: Allergy. European Journal of Allergy and Clinical Immunology, ISSN 0105-4538, E-ISSN 1398-9995, Vol. 74, no 11, p. 2181-2190Article in journal (Refereed) Published
Abstract [en]

Background

Patterns and determinants of long‐term oral corticosteroid (OCS) use in asthma and related morbidity and mortality are not well‐described. In a nationwide asthma cohort in Sweden, we evaluated the patterns and determinants of OCS use and risks of OCS‐related morbidities and mortality.

Methods

Data for 217 993 asthma patients (aged ≥ 6 years) in secondary care were identified between 2007 and 2014 using Swedish national health registries. OCS use at baseline was categorized: regular users (≥5 mg/d/y; n = 3299; 1.5%); periodic users (>0 but <5 mg/d/y; n = 49 930; 22.9%); and nonusers (0 mg/d/y; n = 164 765; 75.6%). Relative risks of becoming a regular OCS user and for morbidity and mortality were analysed using multivariable Cox regression.

Results

At baseline, 24% of asthma patients had used OCS during the last year and 1.5% were regular users. Of those not using OCS at baseline, 26% collected at least one OCS prescription and 1.3% became regular OCS users for at least 1 year during the median follow‐up of 5.3 years. Age at asthma diagnosis, increasing GINA severity and Charlson Comorbidity Index were associated with regular OCS use. Compared to periodic and non‐OCS use, regular use was associated with increased incidence of OCS‐related morbidities and greater all‐cause mortality, adjusted HR 1.34 (95% CI 1.24‐1.45).

Conclusions

Oral corticosteroids use is frequent for asthma patients, and many are regular users. Regular OCS use is associated with increased risk of morbidity and mortality. These findings indicate that there is a need of other treatment options for patients with severe asthma who are using regular OCS.

Place, publisher, year, edition, pages
2019. Vol. 74, no 11, p. 2181-2190
Keywords [en]
asthma, corticosteroids, morbidity, mortality
National Category
Respiratory Medicine and Allergy
Identifiers
URN: urn:nbn:se:uu:diva-397139DOI: 10.1111/all.13874ISI: 000493013000014PubMedID: 31095758OAI: oai:DiVA.org:uu-397139DiVA, id: diva2:1373265
Funder
AstraZenecaAvailable from: 2019-11-26 Created: 2019-11-26 Last updated: 2019-11-26Bibliographically approved

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