NIH Common Data Elements (CDE) Repository

General Details:

Name:: Food Frequency Questionnaire - (FFQ)-kale mustard chard greens indicator
Steward:: NINDS
Definition:: Average total amount of kale, mustard. Or chard greens the subject had over 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
1-3x/mo	1-3x/mo	1-3x/mo (1-3 times per month)
Once per week	Once per week	Once per week
2-4 times per week	2-4 times per week	2-4 times per week
5-6 times per week	5-6 times per week	5-6 times per week
1 or more servings per day	1 or more servings per day	1 or more servings per day

Designation:: Food Frequency Questionnaire - (FFQ)-kale mustard chard greens indicator
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Definition:: Average total amount of kale, mustard. Or chard greens the subject had over 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.