title: The objective assessment of cough frequency: accuracy of the LR102 device.
abstract: BACKGROUND
  The measurement of cough frequency is problematic and most often based on subjective assessment. The aim of the study was to assess the accuracy of the automatic identification of cough episodes by LR102, a cough frequency meter based on electromyography and audio sensors.
  
  
  METHODS
  Ten adult patients complaining of cough were recruited in primary care and hospital settings. Participants were asked to wear LR102 for 4 consecutive hours during which they were also filmed.
  
  
  RESULTS
  Measures of cough frequency by LR102 and manual counting were closely correlated (r = 0.87 for number of cough episodes per hour; r = 0.89 for number of single coughs per hour) but LR102 overestimated cough frequency. Bland-Altman plots indicate that differences between the two measurements were not influenced by cough frequency.
  
  
  CONCLUSIONS
  LR102 offers a useful estimate of cough frequency in adults in their own environment, while significantly reducing the time required for analysis.
authors: Institute of Health and Society, Université Catholique de Louvain (UCL),Clos-Chapelle-aux-Champs 30 bte 3015 Brussels, Belgium. jean-marie.degryse@uclouvain.be.
authors: Sophie
authors: S
authors: Leconte
authors: Giuseppe
authors: G
authors: Liistro
authors: Patrick
authors: P
authors: Lebecque
authors: Jean-Marie
authors: JM
authors: Degryse