Biochemical validation of a self-administered semi-quantitative food-frequency questionnaire.

Porrini, M

Biochemical validation of a self-administered semi-quantitative food-frequency questionnaire. [electronic resource] - The British journal of nutrition Sep 1995 - 323-33 p. digital

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

0007-1145

10.1079/bjn19950138 doi


Adult
Ascorbic Acid--blood
Carotenoids--blood
Diet Records
Eating
Female
Humans
Male
Nitrogen--analysis
Phosphorus--urine
Potassium--urine
Reproducibility of Results
Surveys and Questionnaires
Urea--urine
Vitamin E--blood
beta Carotene