NIH Common Data Elements (CDE) Repository

General Details:

Name:: Food Frequency Questionnaire - (FFQ)-candy bars indicator
Steward:: NINDS
Definition:: Average total amount of candy bars the subject ate this past year, as part of Food Frequency Questionnaire -(FFQ)
Registration Status:: Qualified

Value	Code Name	Code Description
Never	Never	Never
Less than once per month	Less than once per month	Less than once per month
1-3 candy bars per month	1-3 candy bars per month	1-3 candy bars per month
1 candy bar per week	1 candy bar per week	1 candy bar per week
2-4 candy bars per week	2-4 candy bars per week	2-4 candy bars per week
5-6 candy bars per week	5-6 candy bars per week	5-6 candy bars per week
1 candy bar per day	1 candy bar per day	1 candy bar per day
2-3 candy bars per day	2-3 candy bars per day	2-3 candy bars per day
4 or more candy bars per day	4 or more candy bars per day	4 or more candy bars per day

Definition:: Average total amount of candy bars the subject ate this past year, as part of Food Frequency Questionnaire -(FFQ)
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Document:: W.C. Willett, Nutritional Epidemiology, Oxford University Press Validation of a semi-quantitative food frequency questionnaire: comparison with a 1-year diet record.Willett WC, Reynolds RD, Cottrell-Hoehner S, Sampson L, Browne ML.J Am Diet Assoc. 1987 Jan;87(1):43-7. Validation of a dietary questionnaire with plasma carotenoid and alpha-tocopherol levels.Willett WC, Stampfer MJ, Underwood BA, Speizer FE, Rosner B, Hennekens CH.Am J Clin Nutr. 1983 Oct;38(4):631-9. Food-based validation of a dietary questionnaire: the effects of week-to-week variation in food consumption. Salvini S, Hunter DJ, Sampson L, Stampfer MJ, Colditz GA, Rosner B, Willett WC. Int J Epidemiol. 1989 Dec;18(4):858-67. Validation of a dietary questionnaire with plasma carotenoid and alpha-tocopherol levels.Willett WC, Stampfer MJ, Underwood BA, Speizer FE, Rosner B, Hennekens CH.Am J Clin Nutr. 1983 Oct;38(4):631-9.