|
Title
|
|
|
|
Long-term future risk of severe exacerbations : distinct 5-year trajectories of problematic asthma
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| Background: Assessing future risk of exacerbations is an important component of asthma management. Existing studies have investigated short-but not long-term risk. Problematic asthma patients with unfavorable long-term disease trajectory and persistently frequent severe exacerbations need to be identified early to guide treatment. Aim: To identify distinct trajectories of severe exacerbation rates among "problematic asthma" patients and develop a risk score to predict the most unfavorable trajectory. Methods: Severe exacerbation rates over five years for 177 "problematic asthma" patients presenting to a specialist asthma clinic were tracked. Distinct trajectories of severe exacerbation rates were identified using group-based trajectory modeling. Baseline predictors of trajectory were identified and used to develop a clinical risk score for predicting the most unfavorable trajectory. Results: Three distinct trajectories were found: 58.5% had rare intermittent severe exacerbations ("infrequent"), 32.0% had frequent severe exacerbations at baseline but improved subsequently ("nonpersistently frequent"), and 9.5% exhibited persistently frequent severe exacerbations, with the highest incidence of near-fatal asthma ("persistently frequent"). A clinical risk score composed of >= 2 severe exacerbations in the past year (+2 points), history of near-fatal asthma (+1 point), body mass index >= 25kg/m(2) (+1 point), obstructive sleep apnea (+1 point), gastroesophageal reflux (+1 point), and depression (+1 point) was predictive of the "persistently frequent" trajectory (area under the receiver operating characteristic curve: 0.84, sensitivity 72.2%, specificity 81.1% using cutoff >= 3 points). The trajectories and clinical risk score had excellent performance in an independent validation cohort. Conclusions: Patients with problematic asthma follow distinct illness trajectories over a period of five years. We have derived and validated a clinical risk score that accurately identifies patients who will have persistently frequent severe exacerbations in the future. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Allergy: European journal of allergy and clinical immunology. - Copenhagen
| |
|
Publication
|
|
|
|
Copenhagen
:
2017
| |
|
ISSN
|
|
|
|
0105-4538
| |
|
DOI
|
|
|
|
10.1111/ALL.13159
| |
|
Volume/pages
|
|
|
|
72
:9
(2017)
, p. 1398-1405
| |
|
ISI
|
|
|
|
000406970900014
| |
|
Pubmed ID
|
|
|
|
28295424
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|