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Diet History Questionnaire: Size Formats

Alternate Version Available

You are viewing the Web site for the original version of the DHQ. The latest version is the DHQ II. You may want to see the DHQ II version of this information.

Food question variables typically include a frequency question (“How often did you eat this food?”) and a serving size question ("Each time you ate it, how much did you eat?”). The serving size question asks the respondent to choose one answer from a list. Typically, the number of choices equals the number of serving sizes defined in the nutrient database. Specific gram amounts are assigned to each food in the foods database. In the nutrient database provided with Diet*Calc, gram amounts are provided for three portion sizes and are noted here as "small", "medium", "large".

Add a new format if you have added food frequency questions to the DHQ that include serving size questions using a format that is not already defined. Edit an existing format if you have changed the serving size questions throughout the questionnaire, for example, if you are allowing a fourth response to all serving size questions.

Two serving size formats are used on the NCI versions of the DHQ as shown below. Format 1 is used for nearly all serving size questions. Format 2 is used only in special cases, where "never" is allowed as a response (fats added to foods; see pages 11, 13, 15-18 of the DHQ).

Size Format #1:
(3 Portion Size Codes)

0 = Small
1 = Medium
2 = Large
Missing
Error
Size Format #2:
(4 Portion Size Codes - includes "never")

0 = Did not usually add or never added
1 = Small (less than 1 teaspoon or tablespoon)
2 = Medium (1 to 3 teaspoons or tablespoons)
3 = Large (more than 3 teaspoons or tablespoons)
Missing
Error

Last Modified: 18 Oct 2013