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Flag for cases where portion size left blank but times consumed valid

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For sample adults, FOODSIXBFLAG flags cases with a valid observation for the number of times a food was consumed per year, but where the portion size for that food was left blank.

FOODSIXBFLAG is part of a series of variables initiated in 1987 related to food, food knowledge, and cancer. For related variables, please use the IPUMS NHIS search function and drop-down menus or see DIETCHANGEV.


There are no comparability issues.


  • 1987: Half of sample persons age 18+ (excluded from CACT supplement).


  • 1987