title: The prevalence of gastroesophageal reflux disease in adult asthmatics.
abstract: BACKGROUND
  Asthma and gastroesophageal reflux disease (GERD) often coexist. However, the results of the studies investigating the prevalence of GERD among patients with asthma vary greatly.
  
  
  OBJECTIVE
  To investigate the prevalence of GERD in adult patients with asthma.
  
  
  METHODS
  The basic study population consisted of 2,225 asthmatic patients who were treated in six specialist-headed hospitals during 1 year. From the common computer-based discharge register, every 14th patient was randomly selected for the study. Ninety of the 149 contacted patients (60%) agreed to participate in the study. Twenty-four-hour esophageal pH monitoring was performed on all patients.
  
  
  RESULTS
  GERD was found in 32 of the patients (36%). Eight of these patients (25%) were free from classical reflux symptoms. Forty-seven of the 90 patients (52%) presented with typical reflux symptoms. Twenty-four of these patients (51%) were found to have abnormal acidic reflux.
  
  
  CONCLUSIONS
  According to the current study, one third of adult patients with asthma have GERD. These patients often do not have typical reflux symptoms. However, the presence of typical reflux symptoms in an asthmatic patient does not seem to guarantee the presence of abnormal acidic reflux.
authors.affiliation: Department of Pulmonary Diseases, Tampere University Hospital, PO Box 2000, FIN-33521 Tampere, Finland. toni.kiljander@fimnet.fi.
authors.forename: Toni O
authors.initials: TO
authors.lastname: Kiljander
authors.forename: Jukka O
authors.initials: JO
authors.lastname: Laitinen
mesh_terms: D001249:Asthma / Q000150:complications*; D005260:Female; D005764:Gastroesophageal Reflux / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence