Matched cohort study of therapeutic strategies to prevent preschool wheezing/asthma attacks
Received 1 July 2018
Accepted for publication 21 September 2018
Published 11 December 2018 Volume 2018:11 Pages 309—321
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Dr Amrita Dosanjh
Jonathan Grigg,1 Anjan Nibber,2 James Y Paton,3 Alison Chisholm,2 Theresa W Guilbert,4 Alan Kaplan,5 Steve Turner,6 Nicolas Roche,7 Elizabeth V Hillyer,8 David B Price8,9
On behalf of the Respiratory Effectiveness Group
1Blizard Institute, Queen Mary University of London, London, UK; 2Respiratory Effectiveness Group, Cambridge, UK; 3School of Medicine, College of Medical, Veterinary, and Life Sciences, University of Glasgow, Glasgow, UK; 4Pulmonary Division, Cincinnati Children’s Hospital Medical Center, and Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA; 5Family Physician Airways Group of Canada, University of Toronto, Toronto, ON, Canada; 6Department of Child Health, Royal Aberdeen Children’s Hospital, University of Aberdeen, Aberdeen, UK; 7Respiratory Medicine, Cochin Hospital Group, AP-HP, University of Paris Descartes (EA2511), Paris, France; 8Observational and Pragmatic Research Institute Pte Ltd, Singapore, Singapore; 9Academic Primary Care, University of Aberdeen, Aberdeen, UK
Background: An inhaled corticosteroid (ICS) or leukotriene receptor antagonist (LTRA) may prevent wheezing/asthma attacks in preschoolers with recurrent wheeze when added to short-acting β-agonist (SABA).
Objective: The aim of this historical matched cohort study was to assess the effectiveness of these treatments for preventing wheezing/asthma attacks.
Methods: Electronic medical records from the Optimum Patient Care Research Database were used to characterize a UK preschool population (1–5 years old) with two or more episodes of wheezing during 1 baseline year before first prescription (index date) of ICS or LTRA, or repeat prescription of SABA. Children initiating ICS or LTRA on the index date were matched 1:4 to those prescribed only SABA for age, sex, year of index prescription, mean baseline SABA dose, baseline attacks, baseline antibiotic prescriptions, and eczema diagnosis. Wheezing/asthma attacks (defined as asthma-related emergency attendance, hospital admission, or acute oral corticosteroid prescription) during 1 outcome year were compared using conditional logistic regression.
Results: Matched ICS and SABA cohorts included 990 and 3,960 children, respectively (61% male; mean [SD] age 3.2 [1.3] years), and matched LTRA and SABA cohorts included 259 and 1,036 children, respectively (65% male; mean [SD] age 2.6 [1.2] years). We observed no significant difference between matched cohorts in the odds of a wheezing/asthma attack: ICS vs SABA, OR (95% CI) 1.01 (0.85–1.19) and LTRA vs SABA, OR (95% CI) 1.28 (0.96–1.72).
Conclusion: We found no evidence that initiation of ICS or LTRA therapy is associated with fewer attacks during 1 outcome year than SABA alone for a heterogeneous group of preschool children with recurrent wheeze in the real-life clinical setting.
Keywords: electronic medical records, inhaled corticosteroids, leukotriene receptor antagonists, observational study, ICS particle size, short-acting β-agonist
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