Codes and Frequencies
For sample adults ages 18 and older, SPINTP reports the time unit (i.e., day, week, month, or year), which corresponds with the frequency with which the respondent reported eating spinach in the past year. SPINTP should be used in conjunction with SPINNO, which reports the corresponding frequency stated by the respondent. Researchers may also want to use SPINSIZ, which reports the corresponding portion size.
SPINTP 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.
- 1987: Half of sample persons age 18+ (excluded from CACT supplement).
- 1992: Half of sample persons age 18+ in quarters 1 and 2 and 2 weeks in quarter 3 (excluded from CACT supplement).
- 1987, 1992
- 1987, 1992 : SAMPWEIGHT