Real-Life Outcomes for Patients with Asthma Prescribed Spacers for Use with Either Extrafine- or Fine-Particle Inhaled Corticosteroids

Theresa W Guilbert, Gene Colice, Jonathan Grigg, Wim van Aalderen, Richard J Martin, Elliot Israel, Dirkje S Postma, Nicolas Roche, Wanda Phipatanakul, Elizabeth V Hillyer, Jennifer M Evans, Myrna B Dolovich, David B Price (Corresponding Author), Respiratory Effectiveness Group

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

BACKGROUND: Spacers are often used with pressurized metered-dose inhalers (pMDIs) to eliminate the need for coordinating inhalation with actuation.

OBJECTIVE: To investigate the real-life effectiveness of spacers prescribed for use with either extrafine- or fine-particle inhaled corticosteroids (ICSs).

METHODS: This historical matched cohort study examined anonymous medical record data over 2 years (1-year baseline, 1-year outcome) for patients with asthma aged 12 to 80 years initiating ICSs by pMDI with or without prescribed spacer. We compared outcomes for spacer versus no-spacer arms, matched for key baseline and asthma-related characteristics, within 2 ICS cohorts: (1) extrafine-particle ICS (beclomethasone) and (2) fine-particle ICS (fluticasone). Effectiveness end points were compared using conditional regression methods.

RESULTS: Matched spacer and no-spacer arms of the extrafine-particle ICS cohort each included 2090 patients (69% females; median age, 46-47 years) and the 2 arms of the fine-particle ICS cohort each included 444 patients (67% females; median age, 45 years). With extrafine-particle ICS, we observed no significant difference between spacer and no-spacer arms in severe exacerbation rate (primary end point): adjusted rate ratio, 1.01 (95% CI, 0.83-1.23). With fine-particle ICS, the severe exacerbation rate ratio with spacers was 0.77 (0.47-1.25). Oropharyngeal candidiasis incidence was low and similar in spacer and no-spacer arms for both ICS cohorts.

CONCLUSIONS: We found no evidence that prescribed spacer devices are associated with improved asthma outcomes for extrafine- or fine-particle ICS administered by pMDI. These findings challenge long-standing assumptions that spacers should improve pMDI effectiveness and indicate the need for pragmatic trials of spacers in clinical practice.

Original languageEnglish
Pages (from-to)1040-1049.e4
Number of pages14
JournalThe journal of allergy and clinical immunology. In practice
Volume5
Issue number4
Early online date18 Jan 2017
DOIs
Publication statusPublished - Jul 2017

Keywords

  • asthma
  • inhaled corticosteroid
  • IQR
  • interquartile range
  • MMAD
  • mass median aerodynamic diameter
  • pMDI
  • pressurized metered-dose inhaler
  • SABA
  • short-acting β-agonist

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  • Cite this

    Guilbert, T. W., Colice, G., Grigg, J., van Aalderen, W., Martin, R. J., Israel, E., Postma, D. S., Roche, N., Phipatanakul, W., Hillyer, E. V., Evans, J. M., Dolovich, M. B., Price, D. B., & Respiratory Effectiveness Group (2017). Real-Life Outcomes for Patients with Asthma Prescribed Spacers for Use with Either Extrafine- or Fine-Particle Inhaled Corticosteroids. The journal of allergy and clinical immunology. In practice, 5(4), 1040-1049.e4. https://doi.org/10.1016/j.jaip.2016.11.026