Dietary Intake in Adults From the GA2LEN Folow-up Survey

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.

Recruitment Status

COMPLETED

Total Enrollment

3500 participants

Study Classification

OBSERVATIONAL

Study Start Date

2007-01-01

Study Completion Date

2010-12-31

Brief Summary

Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.

The Nutrition Study of the GA2LEN Follow-Survey was designed to investigate the association between usual dietary intake and allergic and respiratory outcomes in adults across Europe. Within this framework, a food frequency questionnaire (FFQ) was designed to ascertain usual dietary intake of 250 food items, which was translated into the languages of the participant centres. Information on daily intake of foods, nutrients, and flavonoids was derived.

Related Clinical Trials

Explore similar clinical trials based on study characteristics and research focus.

Association Between Asthma and Food Allergy

NCT02884583

Food Allergy Suspected Food Allergy Proved

UNKNOWN NA

Nutritional Status in Children With Food Allergy: Evaluation of a New Supplement

NCT06751810

Food Allergies

COMPLETED NA

An Observational Study of Childhood Food Allergy

NCT00356174

Food Hypersensitivity Peanut Hypersensitivity Egg Hypersensitivity +1 more

COMPLETED

Healthcare Decisions on Dietary and Environmental Allergen Exposure

NCT03144908

Dietary Allergy Environmental Allergy

UNKNOWN

Immune-supportive Diet and Gut Permeability in Allergic Children

NCT05667610

Peanut Allergy Nut Allergy

RECRUITING NA

Detailed Description

Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.

Within the GA2LEN Follow-up Survey, the Nutrition Survey was aimed at assessing dietary intake in adults across European countries and its association with various outcomes of allergy and respiratory health. In absence of an internationally comparable dietary questionnaire to ascertain usual dietary intake, a single and standardized food frequency questionnaire (FFQ) was design to be used as a common instrument in all participant countries. The FFQ is comprised of 32 food sections and 250 food items. The FFQ sections were designed following the recommendations by the EFCOSUM Group, which facilitate international comparisons of dietary intake. It also included several staple foods to capture locally representative dietary intake.

Participants reported how often they had consumed each of the foods over the previous month, using eight predefined options (rarely or never, 1-3 times per month, once, 2-4, or 5-6 times per week, once, 2-3 times per day). Standard food portion sizes were used to quantify the intake following the recommendations from the UK's Food Standards Agency. Daily intake of foods (g) were estimated and macro- and micronutrient and flavonoid intakes were derived. The GA2LEN FFQ was validated in five EU countries, namely Finland, UK, Portugal, Germany, Poland, and Greece, and demonstrated to be a good tool to assess mid-term intake of foods, specifically essential polyunsaturated fatty acids (PUFAs). The instrument has also been demonstrated to be an accurate tool to assess dietary sources of flavonoids.

Various approaches were planned to derive dietary exposures and to examine their association with respiratory and allergic outcomes. These included the use of dietary patterns derived from Principal Component Analysis (PCA), a dietary inflammatory index (DII), as well as single antioxidants, and individual food items.

Conditions

See the medical conditions and disease areas that this research is targeting or investigating.

Asthma Lung Function Decreased Food Allergy Allergic Sensitisation Allergic Rhinitis COPD Atopy

Study Design

Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.

Observational Model Type

OTHER

Study Time Perspective

CROSS_SECTIONAL

Interventions

Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.

Dietary intake of various nutrients, foods and biocompounds

Participants answered a self-administered FFQ, in which they reported the usual frequency of intake of a list of 250 food items

Intervention Type OTHER

Eligibility Criteria

Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.

Inclusion Criteria

Participants aged 15-75 years old, who had responded to the GA2LEN Baseline survey and who met the definition of cases or controls (as described below)