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Foo, Chuan T; Yee, Ellen Ly; Young, Alan; Denton, Eve; Hew, Mark; O'Hehir, Robyn E; Radhakrishna, Naghmeh; Matthews, Sarah; Conron, Matthew; Harun, Nur-Shirin; Lachapelle, Philippe; Douglass, Jo Anne; Irving, Louis; Lee, Joy; Stevenson, Wendy; McDonald, Christine F; Langton, David; Banks, Ceri; Thien, Francis
Asia Pacific allergy, 10/2019, Letnik: 9, Številka: 4Journal Article
Epidemic thunderstorm asthma (ETSA) severely affected Melbourne, Australia in November 2016. There is scant literature on the natural history of individuals affected by ETSA. A multicentre 12-month prospective observational study was conducted assessing symptomatology and behaviors of ETSA-affected individuals. We used a structured phone questionnaire to assess asthma symptom frequency, inhaled preventer use, asthma action plan ownership and healthcare utilization over 12 months since the ETSA. Analysis of results included subgroup analyses of the "current," "past," "probable," and "no asthma" subgroups defined according to their original 2016 survey responses. Four hundred forty-two questionnaires were analyzed. Eighty percent of individuals reported ongoing asthma symptoms at follow-up, of which 28% were affected by asthma symptoms at least once a week. Risk of persistent asthma symptoms was significantly higher in those with prior asthma diagnosis, current asthma, and probable undiagnosed asthma (all < 0.01). Of 442 respondents, 53% were prescribed inhaled preventers, of which 51% were adherent at least 5 days a week. Forty-two percent had a written asthma action plan and 16% had sought urgent medical attention for asthma in the preceding year. Following an episode of ETSA, patients experience a pivotal change in asthma trajectory with both loss of asthma control and persistence of asthma. Suboptimal rates of inhaled preventer adherence and asthma action plan ownership may contribute to asthma exacerbation risk and susceptibility to future ETSA episodes. Longer-term follow-up is needed to determine the extent and severity of this apparent change.
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in: SICRIS
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