COMPARISON OF QUESTIONNAIRES - BMRC AND NHLI RESPIRATORY QUESTIONNAIRES AND A NEW SELF-COMPLETION QUESTIONNAIRE

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Abstract
Interviewer-administered National Heart and Lung Institute (NHLI) and British Medical Research Council (BMRC) respiratory questionnaires were compared with each other and with a self-administered questionnaire in 2350 adults enrolled in a longitudinal community study. There was a basic 10% disagreement between responses to any 2 questionnaires for all questions inquiring about a perception of a complaint or a disease, but much less disagreement for more factual questions, such as those concerning smoking. Little effect was noted from minor variations in wording, order of questions, method of administration, inclusion of other questions or time between questionnaires (as long as this interval was < 1 mo.). For questions with similar wording, the BMRC and NHLI questionnaires yielded very similar results in terms of over-all prevalence of responses, relationships to answers on an independent questionnaire, and inter-relationships of positive responses. The new self-completion questionnaire used in this study detected more abnormalities and better delineated cough and phlegm "syndromes" than the NHLI or BMRC questionnaire; self-administration was a very satisfactory technique in the type of population surveyed.

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