Validation of a single concentration methacholine inhalation provocation test (SCIPT) in children

Wanda Hagmolen Of Ten Have*, N. J. Van Den Berg, J. Van Der Palen, P. J.E. Bindels, W. M.C. Van Aalderen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

22 Citations (Scopus)


A new method to assess bronchial hyperresponsiveness (BHR) using a single concentration methacholine has already been validated in adults with asthma. Because the geometrical dimensions of the airways in children are different, the results from studies in adults cannot be extrapolated to children. In this study, we validated the single concentration methacholine inhalation provocation test (SCIPT) in children. Twenty-two children performed three methacholine inhalation challenge tests in random order. Two challenges were performed according to the SCIPT: doubling doses (0.03-1.8 mg; maximal cumulated dose 3.6 mg) were administered with an Aerosol Provocation System (Masterscope, Jaeger). The third challenge was performed according to a standard dosimeter method (SDM): doubling doses (0.002-1.8 mg; maximal cumulative dose 3.5 mg) were administered with a De Villbiss 646 nebulizer. The degree of BHR is expressed as a PD20- A difference of < 1.5 dose step was assumed to be due to intraindividual variation. We found an intraclass correlation of 0.91 between both tests according to the SCIPT and of 0.80 between the SCIPT and SDM. We found, according to the method of Bland and Altman, good agreement when comparing these two challenge tests. The single concentration inhalation provocation test is reproducible and shows good agreement with a standard dosimeter method to test bronchial responsiveness in children.

Original languageEnglish
Pages (from-to)419-423
Number of pages5
JournalJournal of asthma
Issue number6
Publication statusPublished - 26 Oct 2005
Externally publishedYes


  • Bronchial (hyper) responsiveness
  • Inhalation challenge
  • Methacholine
  • PD
  • Pediatrics


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