• Francine M Ducharme, Francisco J D Noya, Felicia C Allen-Ramey, Eric M Maiese, Joanie Gingras, and Lucie Blais.
• Department of Pediatrics, University of Montreal, Montreal, Quebec, Canada. francine.m.ducharme@umontreal.ca
• Curr Med Res Opin. 2012 Jan 1;28(1):111-9.

ObjectivesTo examine the real-life effectiveness of inhaled corticosteroids (ICS) versus leukotriene receptor antagonists (LTRA) monotherapy in children with mild or moderate asthma.MethodsUsing medical and drug records, we accrued a cohort of 227 children aged 2-17 years, prescribed daily LTRA or ICS monotherapy. LTRA-treated children were matched on age, gender, and previous acute-care visits in a 1:3 ratio to ICS-treated children. Outcomes included rescue oral corticosteroids, prescription duration and dispensing, acute-care visits, hospital admissions, and β(2)-agonist use.ResultsMore ICS- than montelukast-treated children had persistent asthma (73 vs. 50%) and fewer had good asthma control (35 vs. 61%) at baseline, suggesting residual confounding by indication. Physician prescriptions covered 62% of the follow-up period for ICS compared to 97% for montelukast (mean group difference [MGD]: -17%, 95% CI: -28%, -7%). In pharmacies, patients claimed 51 vs. 74% of prescribed ICS and montelukast, respectively (MGD = -12% [-20%, -4%]). Consequently, dispensed ICS and montelukast covered 24% and 38% of follow-up period, respectively (MGD = -14% [-22%, -6%]). No group differences in oral corticosteroids (RR = 1.10 [0.66, 1.84]) and acute-care visits (RR = 1.79 [0.96, 3.34]) were observed. ICS-treated children experienced more hospital admissions (RR = 3.63 [1.20, 11.03]) and needed more frequently rescue β(2)-agonist use of ≥4 doses per week (RR = 2.54 [1.23, 5.23]).ConclusionsWhen compared to LTRA, the prescription of ICS monotherapy did not significantly reduce rescue oral corticosteroids or acute care visits and was associated with a higher rate of hospital admission for asthma and rescue β(2)-agonist use. The findings may be due to paradoxical shorter ICS prescription duration and lower patient adherence, despite more persistent asthma and poorer control than in LTRA-treated children.

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