With respect to consumers' preference for the label reference unit: per portion or per serving size is preferable to servings listed per 100 g (23, 29, 31, 40).
For each fruit or vegetable, a standard unit or portion size was specified.
The common unit or portion size for each food item was specified.
For each food item on the FFQ, a unit or portion size was specified.
We did not specify the unit or portion of each item.
Participants were asked how often, on average, during the previous year they had consumed a specified common unit or portion size of a specific type of food.
Women were asked, on average, how often over the past year they consumed a commonly used unit or portion size of each item.
Consumption of each food is based on a commonly used unit or portion size, with nine possible response categories of intake frequency, ranging from "never" to "6 or more times per day".
Foods were specified using a common unit or portion size (e.g., one slice of bread or one 8-oz glass of milk), and detailed information was collected on type of fat or oil used in food preparation.
Participants were asked how often they had consumed a commonly used unit or portion size of each food on average during the previous year, choosing from nine possible frequency responses ranging from "never or less than once per month" to "more than six times per day".
A common unit or portion size for each food or drink item is specified, and responses are marked according to a nine-point scale, ranging from 'rarely or never' to '7+ per d' to describe the typical amount and frequency of each food consumed.
