A short diet history for assessing dietary exposure to N-nitrosamines in epidemiologic studies.

A short diet history for use in assessing dietary nitrosamine exposure in epidemiologic studies has been developed by using data from a case-control study of diet and stomach cancer carried out in Ontario, Manitoba, and Newfoundland between 1979 and 1982. The method gives excellent correlations for seven dietary components with estimates based on a full diet history, and also performs well when tested on a different data set from a case-control study of diet and colorectal cancer carried out in Ontario and Alberta between 1976 and 1978.