title: Survey of physicians concerning the use of chest radiography in the diagnosis of pneumonia in out-patients.
abstract: OBJECTIVE
  To determine how physicians use chest radiography in the diagnosis of pneumonia in ambulatory patients.
  
  
  METHODS
  A convenience sample of 176 Nova Scotia family physicians and internists selected to represent all geographic areas of the province proportional to population.  STUDY INSTRUMENT: A 35-item questionnaire covering demographics, experience with out-patients with pneumonia, use of chest radiographs to make this diagnosis and factors that were considered important in the decision to perform initial and follow-up chest radiographs. Two skill-testing questions were also included.
  
  
  RESULTS
  One hundred and fourteen of 176 (64.7%) responded; 88% had treated out-patients with pneumonia in the previous three months. Fifty-seven per cent of physicians requested chest radiographs on 90% to 100% of out-patients in whom they had made a clinical diagnosis of pneumonia. These physicians were more likely to be internists and to have graduated before 1970. Factors that ranked most important in the decision to request the initial chest radiograph were clinical appearance, respiratory distress and physical findings, while age and smoking history contributed most to the decision to perform a follow-up chest radiograph.
  
  
  CONCLUSIONS
  There is considerable variability among physicians in requesting chest radiographs on out-patients with a clinical diagnosis of pneumonia. Physician and patient factors contribute to this variability.
authors.affiliation: Departments of Medicine and Microbiology, Dalhousie University and Victoria General Hospital, Halifax, Nova Scotia.
authors.forename: T J
authors.initials: TJ
authors.lastname: Marrie