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Frequency took vitamin A, past 12 months: Days per week

Codes and Frequencies

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For sample adults in 2000 who had taken vitamin A during at least 1 month of the past 12 months (VITAMINAMO), VITAMINADWK reports the number of days per week the respondent had taken vitamin A in those months.

The National Center for Health Statistics (NCHS) used the information recorded in two separate variables--one reporting the time period selected by the respondent (VITAMINATP), and the other reporting the number of days per week or per month reported (VITAMINANO)--to create the new recoded variable VITAMINADWK with a single time unit of times per week. VITAMINATP and VITAMINANO record responses to the question, "During {the/those} month(s), about how many {days [per week]/days per month} did you take vitamin A?"

Related Variables 

The NCHS also used data from VITAMINATP and VITAMINANO to create a second recoded variable with a single time unit, VITAMINADMO, which reports the number of days per month respondents had taken vitamin A during the relevant months of the past 12 months. VITAMINADMO is also available for 1992 and 1987, when it was asked as a direct question.

Variables similar to VITAMINADWK are available for the following vitamin/mineral supplements (for 2000 only):

For more information on the full range of variables related to vitamins, see VITANY.


VITAMINADWK is only available in 2000.


  • 2000: Sample adults age 18+ who took vitamin A in past 12 months.


  • 2000