Variability in Answers to a Questionnaire on Respiratory Symptoms

Abstract

Chronic bronchitis can be recognized, in its early stages, only from the patient's account of his symptoms. During the last few years the prevalence of respiratory symptoms has been surveyed in many popurations in the United Kingdom. A more or less uniform questionnaire has been developed by certain workers in consultation; but until recently there has been no general agreement on its content or layout. The questionnaire is completed by one observer at one interview with each subject.