Sentences with phrase «[food frequency questionnaire»

Adherence was monitored with the use of food - frequency questionnaires during the study and was corroborated at the end of the study through the measurement of peanut in bed dust, an objective and previously validated surrogate for consumption.23, 24

In a linked editorial, Dr Kathryn Fitzgerald of John Hopkins School of Medicine, Baltimore, emphasises the caveats for an observational study of this kind which relies on food frequency questionnaires that are not fully able to describe different types of fat.

At two early visits, participants filled out a 66 - item food frequency questionnaire, which asked how often, on average, the participants consumed each food item in what portion size over the previous year.

Women were sorted into four quartile groups based on the amount of isoflavone they were estimated to have consumed, calculated from self - reported food frequency questionnaires.

Image - based dietary assessment, or IBDA, aims to reduce or eliminate the inaccuracies that commonly accompany traditional methods such as written dietary records, 24 - hour dietary recalls and food frequency questionnaires.

Selected participants did not have diabetes or prediabetes during an initial baseline examination and self - reported their long - term sugar - sweetened beverage and diet soda consumption habits through food frequency questionnaires.

All participants first completed a detailed food - frequency questionnaire along with a questionnaire regarding lifestyle and background factors (alcohol, smoking, physical activity, and years of education) as well as a brief physical examination including measurement of waist circumference.

On entering the study, participants completed a previously validated semi-quantitative food frequency questionnaire to collect information on coffee consumption, lifestyle and sociodemographic characteristics, anthropometric measurements, and previous health conditions.

At the start of CARDIA (1985 - 1986), women and men were asked about their consumption of different fruits and vegetables and the number of servings they had eaten in the past month using a semi-quantitative interview food - frequency questionnaire.

For both studies, dietary fibre intake was measured using Food Frequency Questionnaire responses.

The PHS II includes more than 14,000 US male physicians over 50 years of age who have completed comprehensive food frequency questionnaires.

Both studies used detailed food - frequency questionnaires administered every four years to evaluate the composition of the participants» diets.

Information was collected on their height, weight, food consumption by self - reported food frequency questionnaires, lifestyle and physical activity habits.

The men's diet was assessed by means of a food frequency questionnaire, and they were asked how often, on average, they had consumed how many portions of fruit and vegetables, using standard portion sizes such as one apple, or half an avocado.

All study participants completed a food frequency questionnaire, detailing how much and how often they had eaten 187 food items over the preceding four weeks.

All of the participants, which were patients of the University of Michigan Head and Neck Specialized Program of Research Excellence, were asked to track their intake of food, beverages and supplements for a year prior to diagnosis and a year following treatment using the Harvard Food Frequency Questionnaire.

People in these studies filled out food - frequency questionnaires every two years, and also had their health monitored regularly.

Dr. Arun Swaminath explained that the study's data on omega - 3 intake came from «food frequency questionnaires,» and these types of studies «have significant weaknesses to the point that some have questioned whether they should be abandoned altogether.»

In order to assess dietary intake, most epidemiological studies use Food Frequency Questionnaires, or FFQs.

Every one of them was free from cancer and cardiovascular disease at beginning of the study, when they completed the food frequency questionnaire used in the research.

Dietary data was collected by means of a food - frequency questionnaire.

In all the studies, dietary magnesium levels were established making use of a 24 - hour dietary recall or a food frequency questionnaire.

Currently at over 275,000 participants, people were given «food frequency questionnaires» every four years.

General Mills provided funding for coding of the food - frequency questionnaire completed by study participants.

Physical activity recall and 1 - week food frequency questionnaire were obtained at baseline and 3, 6, and 12 months to examine physical activity and dietary confounders as potential covariates.

In 1986 and 1990, a semiquantitative food - frequency questionnaire (SFFQ) was mailed to NHS participants.

Estimates from 2 semiquantitative food - frequency questionnaires, administered in 1986 and 1990, were averaged to assess dietary intakes.

Validity of carbohydrate, glycaemic index and glycaemic load data obtained using a semi-quantitative food - frequency questionnaire

Dietary data were collected with a 145 - item food - frequency questionnaire (FFQ), modified for the Australian diet and vernacular from an early Willett questionnaire (14).

Design: Analysis included 1490 postmenopausal women and 1245 men aged ge 49 y at baseline (1992 — 1994) from a population - based cohort who completed a validated food - frequency questionnaire.

One cited study, which attributes stroke to excessive salt intake, is a meta - analysis of thirteen studies published between 1966 and 2008 in which most measurements of sodium intake were highly inaccurate estimates based on food frequency questionnaires.22 The second is a review of fifty - two studies, which concluded that strokes are not caused by excess sodium but rather by insufficient potassium, a finding that is consistent with the preponderance of evidence.23 Cordain ignores more recent large clinical and epidemiological studies, which have found that sodium intakes of less than 3 grams per day significantly increase cardiovascular risk.3, 4

Furthermore, the «Food Frequency Questionnaire» utilized in this study examines primarily «sugars used as ingredients in processed and prepared foods, such as breads, cakes, soft drinks, jam, and ice cream, and sugars eaten separately or added to foods at the table.»

Estimates of nutrient intake from a food frequency questionnaire: the 1987 National Health Interview Survey

Differences between food group reports of low - energy reporters and non-low-energy reporters on a food frequency questionnaire.

Almost all of these epidemiological studies rely on food frequency questionnaires that ask respondents to remember what they ate weeks, months, and in some cases, YEARS ago.

Bedard D, Shatenstein B, Nadon S. Underreporting of energy intake from a self - administered food - frequency questionnaire completed by adults in Montreal.

Participant characteristics associated with errors in self - reported energy intake from the Women's Health Initiative food - frequency questionnaire.

Design: Usual dietary intakes were assessed with a food - frequency questionnaire among 486 apparently healthy women.

Researchers followed a sample of 6,712 girls between the ages of 9 and 15 over a period of seven years, annually assessing their dairy, calcium and vitamin D intakes via a food frequency questionnaire.

They were also asked to complete a 120 - item food - frequency questionnaire to assess dietary change from the beginning to the end of the study.

Data on maternal diet in pregnancy were collected by a food frequency questionnaire (FFQ) at 32 weeks gestation, covering all the main foods consumed in Britain [13].

In a subgroup of 1953 study participants who also completed a 24 - hour dietary - recall questionnaire on 2 nonconsecutive days, 33 the Spearman coefficient for the correlation between coffee consumption as assessed with this questionnaire and coffee consumption as assessed with the baseline food - frequency questionnaire was 0.80.

Design: Intakes of vitamin D and calcium from foods and supplements were measured every 4 y with the use of a food - frequency questionnaire.

The Memory and Aging Project recruited 960 volunteers, ages 58 - 99, who completed a food frequency questionnaire and had at least two cognitive assessments over the course of four years and seven months.

An optional «food frequency questionnaire» was added from 2004 to February 2013, and the MIND diet study looked at results for 923 volunteers.

Coffee intake was obtained from participant self - reports using the Cornell Medical Index (CMI) and Food Frequency Questionnaires (FFQ).

Although the Lim team found no relationship between dietary intake of preformed retinol and fracture risk, it only used one one - week food frequency questionnaire (FFQ), 13 whereas the 1998 Melhus study used four one - week FFQs, 7 and the Nurses» Health Study used five one - week FFQs.

Dietary glycemic load assessed by food - frequency questionnaire in relation to plasma high - density - lipoprotein cholesterol and fasting plasma triacylglycerols in post-menopausal women

Food groups were formed based on a semiquantitative food frequency questionnaire (12); for example, the whole - grain group was formed as the sum of the number of servings per week of dark bread, brown rice, whole - grain breakfast cereal, bran, wheat germ, and a miscellaneous whole - grain item (13).

Macronutrient intake was recorded using food frequency questionnaires.