Sentences with phrase «on food frequency questionnaires»

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.

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

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.

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

Differences between Food Group Reports of Low - Energy Reporters and Non — Low - Energy Reporters on a Food Frequency Questionnaire.

Dietary validation studies have indicated that the frequency of coffee consumption reported on a food frequency questionnaire is highly reproducible and agrees well with assessments using diet records (15).

Not exact matches

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.

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 conditionOn 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 conditionon coffee consumption, lifestyle and sociodemographic characteristics, anthropometric measurements, and previous health conditions.

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.

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.»

Questionnaires for food frequency were made use of every 4 years for assessing the habitual diet of individuals, asking how often, on average, each food was consumed in a standard portion size.

Study participants received a questionnaire on food frequency at the time of enrollment and again 3 years later to evaluate their diet.

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.

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 (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 (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).

Diet was assessed at phases 3, 5, 7 and 9 using a 127 - item machine - readable semi-quantitative food frequency questionnaire (FFQ) which originates from the tool used in the US Nurses» Health Study, a self - administered questionnaire on habitual diet over the past 12 months30, 31.

Stratified analyses were also conducted by methodologic quality, sex, type of dietary assessment tool (food frequency questionnaires vs food records and 24 - hour recall), continental region (North America, Europe, and Asia), and type of prevention strategy (primary vs secondary) to assess the influence of these factors on the observed associations between diet and CHD.

Participants were asked to report the hours spent per week on moderate (eg, brisk walking) and vigorous (eg, strenuous sports and jogging) exercise, then the total hours of metabolic equivalent tasks per week were estimated on the basis of the metabolic equivalent task score assigned to each activity.15 Dietary variables were assessed using a validated semiquantitative food frequency questionnaire.12 Mental health was assessed using the 36 - Item Short - Form Health Survey in the 1996 questionnaire.

At 3 months, a subset of 121 adolescent mothers reported on their infant's intake through a food frequency questionnaire.

A food frequency questionnaire was constructed based on an instrument used previously in this population.3 Mothers were asked about the foods that their infant had consumed over the past week, when they first introduced these foods, and factors that might have influenced their feeding behavior.