Abstract
Chronic diseases diagnosed in clinical examinations of a representative sample of 809 persons in Baltimore, Md. are compared with health conditions previously reported in household interviews for the same persons. Only 1/4 of the diagnosed chronic diseases had been reported in any related terms in the interviews. The proportion reported varied widely among diagnoses; it was not satisfactorily high for any subgroup of the population. For any purpose for which information on a large proportion of diagnosable chronic diseases is required, a household interview survey is an unsuitable method of study.

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