Clinical variables are poor selection criteria for the use of methacholine bronchoprovocation in symptomatic subjects

Annie Lin Parker, Muhanned Abu-Hijleh

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

OBJECTIVE: Airway hyperresponsiveness (AHR) is associated with persistent air flow limitation and accelerated FEV1 decline. AHR can influence diagnosis, treatment, and prognosis. We assessed the value of pulmonary function variables, symptoms, and history as selection criteria for methacholine bronchoprovocation testing to detect AHR in symptomatic subjects. METHODS: Over a 4-year period we conducted a prospective study of consecutive subjects who underwent methacholine bronchoprovocation testing. Baseline pulmonary function testing (PFT) and a questionnaire were obtained prior to methacholine bronchoprovocation testing. PFT and symptom and history variables were assessed as AHR predictors in univariate and multiple logistic regression analyses for the whole group and for 4 different age groups. RESULTS: There were 530 subjects, with ages ranging from 5 to 87 years, and 232 (44%) were positive for methacholine AHR. AHR was more prevalent among subjects < 25 years old (59%) and > 65 years old (47%) than among the other age groups. PFT values, symptom, and history variables had different AHR predictive values among the different age groups. Symptom and history variables had no AHR predictive value among subjects < 25 or > 65 years old. CONCLUSIONS: Young and elderly symptomatic subjects are more likely to have methacholine AHR. None of the clinical variables we studied has significant predictive value for methacholine AHR across the age groups, so these variables are poor selection criteria for methacholine bronchoprovocation testing of symptomatic subjects. Given the high prevalence of AHR among these subjects, bronchoprovocation should be considered with all individuals who have respiratory symptoms of wheezing, cough, shortness of breath, or chest tightness.

Original languageEnglish (US)
Pages (from-to)596-601
Number of pages6
JournalRespiratory Care
Volume48
Issue number6
StatePublished - Jun 2003

Keywords

  • Airway hyperresponsiveness
  • Bronchoprovocation
  • Methacholine
  • Predictors
  • Pulmonary function testing
  • Symptoms
  • Triggers

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine
  • Critical Care and Intensive Care Medicine

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