Ambulatory quantitative waking and sleeping cough assessment in patients with cystic fibrosis

J Cyst Fibros. 2011 May;10(3):193-200. doi: 10.1016/j.jcf.2011.02.003. Epub 2011 Apr 2.


Background: Although cough is a commonly reported symptom, objective quantitation of cough during normal activity has not been performed in patients with CF.

Methods: An ambulatory device was used to characterize cough over 24 hours. Pulmonary function and subject-reported coughing were also assessed.

Results: Patients included 19 clinically stable adults with CF (males:females=10:9; median age [range]=26 [19-57] years; median %-predicted FEV(1) [range]=65 [44-106]%). Median [range] cough rate was 27 [13-66] coughs/hour, with values while awake of 41 [20-102] and while asleep of 2 [0.1-7] (p<0.0001, Wilcoxon signed-rank test). Subjective reporting was consistent with objective data for wake-sleep differences, but correlated poorly with objective waking cough rate.

Conclusions: Outpatient cough quantitation in patients with CF is feasible, indicates frequent coughing even during clinical stability, and may be useful in therapeutic trials in CF.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Cough / etiology*
  • Cough / physiopathology
  • Cystic Fibrosis / complications*
  • Cystic Fibrosis / diagnosis
  • Cystic Fibrosis / physiopathology*
  • Cystic Fibrosis / psychology
  • Feasibility Studies
  • Female
  • Forced Expiratory Volume
  • Humans
  • Lung / physiopathology
  • Male
  • Middle Aged
  • Monitoring, Ambulatory* / adverse effects
  • Patient Compliance
  • Sleep*
  • Time Factors
  • Wakefulness*
  • Young Adult