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YAMYR is a 4-digit-numeric variable.

0: Never or less than 6 times per year
9995: 9995+ times
9996: Not in Universe
9999: Unknown-don't know


For sample adults, YAMYR is a recoded variable that reports how many times per year the respondent consumed sweet potatoes or yams. This recoded variable is based on the responses to YAMNO, which reports the frequency with which the respondent ate sweet potatoes or yams, and YAMTP, which reports the corresponding time unit.

YAMYR is part of a series of variables related to food, food knowledge, and cancer. For related variables, please use the IPUMS NHIS search function and drop-down menus.


Beginning in 2010, sweet potatoes are included with other types of potatoes (POTATONO).

Changes in survey design (e.g., quarters in which the supplement was collected) may affect raw frequencies, but do not affect comparability of the variable. As always, data users should use the prescribed IHIS weights.


  • 1987: Half of sample persons age 18+ (excluded from CACT supplement).
  • 1992: Half of sample persons age 18+ in quarters 1 and 2, and in 2 weeks of quarter 3 (excluded from CACT supplement).


  • 1987, 1992