Methacholine challenge test: Diagnostic characteristics in asthmatic patients receiving controller medications

The Journal of Allergy and Clinical Immunology, 04/03/2012

The utility of the methacholine challenge test (MCT) to rule out a diagnosis of asthma depends on racial and atopic characteristics. Clinicians should take into account the reduced sensitivity of the MCT in white and nonatopic asthmatic patients when using this test for the diagnosis of asthma.

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