Are food frequency questionnaires accurate?
Frequency data can explain much of the variation in dietary intake, and FFQs can provide sufficient accuracy to rank individuals in terms of risks for subsequent health outcomes. FFQs have been used in many studies to predict associations between dietary intake and disease-specific mortality and morbidity [4].
How do you assess food frequency questionnaire?
Description. A food frequency questionnaire (FFQ) consists of a finite list of foods and beverages with response categories to indicate usual frequency of consumption over the time period queried. To assess the total diet, the number of foods and beverages queried typically ranges from 80 to 120.
Who uses food frequency questionnaire?
The food frequency questionnaire (FFQ) is one of the most common tools used in large-scale population-based studies to examine the relation between diet and disease, owing to easy administration and low cost [2, 3].
What is a semiquantitative food frequency questionnaire?
A Food Frequency Questionnaire (FFQ) is a limited checklist of foods and beverages with a frequency response section for subjects to report how often each item was consumed over a specified period of time. Semi-quantitative FFQs collect portion size information as standardized portions or as a choice of portion sizes.
What is the main goal of a food frequency questionnaire?
Food frequency questionnaires (FFQs) are designed to assess habitual diet by asking about the frequency with which food items or specific food groups are consumed over a reference period.
What are the advantages of food frequency questionnaire?
Advantages of FFQs include relatively lower administrative costs and time and the ability to assess usual and longer term intake; disadvantages include inaccuracy of absolute nutrient values, fluctuation of nutrient values depending on instrument length and structure (15), lack of detail regarding specific foods, and …
What is one advantage of food frequency questionnaires?
When would you use a food frequency questionnaire?
Food frequency questionnaires (FFQs) have been used to assess long-term dietary intakes, an important exposure factor for conditions such as cardiovascular diseases and some cancers [1].
What are the qualities of a food questionnaire?
FFQs differ in the way they are developed and show large variations in design characteristics, such as number of items or inclusion of portion-size questions….Abstract
- energy intake.
- food.
- ascorbic acid.
- nutrients.
- gender differences.
- nutrient intake.
What is the importance of questionnaire method in diet survey?
Dietary survey is done to assess the quantities of food items and nutrients consumed by the family or an individual. The nutrition composition is calculated using tables of nutritive value of common foods. These tables are given in the ICMR publication: Nutritive Value of Indian Foods.
What major weakness of a food frequency questionnaire should be taken into consideration when using it?
FFQs lack detailed information on how the food was prepared as well as information on exactly how much was consumed and when. Since FFQs are limited to a fixed list of foods, they may not capture eating patterns of people who have very different eating patterns.
What is a disadvantage of using a food record?
Disadvantages of a dietary record include biases both the selection and measurement of the food. Some participants will change what they eat drastically during a recording period. This recording bias is seen as a disadvantage as a typical day is not recorded. In some situations this is a good problem to encounter.
Which is the NHANES food frequency questionnaire instrument?
NCI developed a new instrument called the NHANES Food Frequency Questionnaire (formerly called Food Propensity Questionnaire) and supported its application in the National Health and Nutrition Examination Survey (NHANES).
Which is the basis for the NHANES FFQ?
The basis for the NHANES FFQ is the NCI Diet History Questionnaire (DHQ), a 124-item food frequency instrument that is widely used in nutritional epidemiology research (Subar 2001a).
When did the National Health and Nutrition Examination Survey start?
NHANES I. Conducted from 1971-1974, the National Health Examination Survey added a nutrition component and was renamed the National Health and Nutrition Examination Survey (NHANES I). The first NHANES focused on the U.S. population aged 1-74. In 1974-1975, there was an augmentation to the survey on an additional national sample.
When did the first NHANES survey come out?
The first NHANES focused on the U.S. population aged 1-74. In 1974-1975, there was an augmentation to the survey on an additional national sample. This augmentation sample only included adults aged 25-74 and did not oversample any population groups nor include nutrition data.