We determined whether estimation of intake of specific carotenoids with a standard food-frequency questionnaire (FFQ) could be improved by collection of additional data on the intake of carotenoid-rich food items. The foods included on an addendum to the standard FFQ were potentially important dietary contributors of alpha- and beta-carotene, beta-cryptoxanthin, lutein, zeaxanthin, or lycopene....

OBJECTIVE Salt intake restriction is important to health maintenance in subjects tending toward excessive intake. For convenience salt intake is ordinarily estimated at health check up centers using a salt-preference questionnaire, but whether or not the questionnaire identifies excessive salt consumers is unclear. METHODS Daily salt intake in 725 subjects including 452 men examined at our he...

A quantitative food-frequency questionnaire (FFQ) was developed to determine antioxidant intake in athletes. The questionnaire will be valuable for researchers wishing to standardize antioxidant intake or simply document habitual intake during an intervention trial. One hundred thirteen athletes participated in the validity study, of whom 96 completed the questionnaire and blood test, 81 comple...

OBJECTIVE To assess the ability of a semiquantitative food frequency questionnaire (FFQ) to measure calcium and bone-related nutrient intakes in a rural South Dakota population. DESIGN Intake estimates from FFQ were compared with four 24-hour recalls obtained quarterly during the preceding year. SUBJECTS Convenience sample of 100 participants of the South Dakota Rural Bone Health Study were...

BACKGROUND Healthy Foods North (HFN) is a community-based intervention designed to promote a healthy diet and lifestyle of Inuit and Inuvialuit populations in Arctic Canada. The objective of the present study was to determine the effects of HFN on the nutrient intake of women of childbearing age. METHODS Six communities in Nunavut (n = 3) and the Northwest Territories (n = 3) were selected fo...

CONTEXT AND OBJECTIVE Sodium and potassium intake from different food sources is an important issue regarding cardiovascular physiology. Epidemiological assessment of the intake of these electrolytes intake is done through food frequency questionnaires or urinary excretion measurements. Our aim was to compare these methods using a sample of Brazilian civil servants. DESIGN AND SETTING Cross-s...