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[Epidemiology, an accessory application of health questionnaires].

Positive answers to health questionnaires, including 3 328 answers by 200 family physician patients and 3 439 answers by 115 hospital outpatients disclosed numerous symptoms, antecedents, and side effects of therapy. Several correlations between findings were detected. Data confirmed previous publications, and may be of use for teaching programs, care organization, and preventive medicine. However, these applications appear as accessory and the main utility of health questionnaires is to help diagnosis in individuals. Should the purpose be epidemiology, questionnaires would become longer as the result of the influence of psychosociologists and experts in data processing. They would only be suitable for polls. In everyday practice, questionnaires will be accepted only if they are kept short.