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The IDEFICS cohort: design, characteristics and participation in the baseline survey
1Bremen Institute for Prevention Research and Social Medicine, University Bremen, Germany. ahrens@bips.uni-bremen.de
Insights
The Identification and prevention of dietary- and lifestyle-induced health effects in children and infants (IDEFICS) study collected extensive data on child health and lifestyle factors. This cohort provides a rich resource for understanding childhood obesity and related disorders.
Area of Science:
- Pediatric Health and Nutrition
- Public Health Research
- Childhood Obesity Etiology
Background:
- The European IDEFICS study aimed to determine causes of overweight and obesity in children.
- It also focused on developing and evaluating a primary prevention program for diet- and lifestyle-related health issues.
Purpose of the Study:
- This paper details the etiological aspects of the IDEFICS multicenter study.
- It covers the measures, examinations, sociodemographic characteristics, and participation rates of the study sample.
Main Methods:
- A prospective cohort study design with an embedded intervention component was used.
- The study involved a baseline survey across eight European countries from 2007-2008.
- Data collection included parent-reported information and objective measurements of children's health and lifestyle.
Main Results:
- 16,224 children aged 2-9 years participated in the baseline cohort, with recruitment varying by country.
- Comprehensive data were collected, including anthropometry (90%+), blood pressure (90%+), accelerometry (46%), fitness tests (35-41%), and biological samples (saliva, urine, blood).
- Sociodemographic data revealed variations in income distribution across countries, with low-income groups notably represented in Cyprus, Italy, and Germany.
Conclusions:
- The IDEFICS cohort offers valuable data for investigating the complex interplay of factors contributing to diet- and lifestyle-related disorders in children.
- This includes social, environmental, genetic, physiological, and behavioral influences.
Background:
The European IDEFICS (Identification and prevention of dietary- and lifestyle-induced health effects in children and infants) study was set up to determine the aetiology of overweight, obesity and related disorders in children, and to develop and evaluate a tailored primary prevention programme.
Objective:
This paper focuses on the aetiological element of the multicentre study, the measures and examinations, sociodemographic characteristics of the study sample and proportions of participation.
Design:
Prospective cohort study with an embedded intervention study that started with a baseline survey in eight countries in 2007-2008.
Subjects And Measurements:
Baseline participants of the prospective cohort study were 16,224 children aged 2-9 years. Parents reported sociodemographic, behavioural, medical, nutritional and other lifestyle data for their children and families. Examinations of children included anthropometry, blood pressure, fitness, accelerometry, DNA from saliva and physiological markers in blood and urine. The built environment, sensory taste perception and other mechanisms of children's food choices and consumer behaviour were studied in subgroups.
Results:
Between 1507 and 2567, children with a mean age of 6.0 years and an even sex distribution were recruited from each country. Of them, 82% lived in two-parent families. The distribution of standardised income levels differed by study sample, with low-income groups being strongly represented in Cyprus, Italy and Germany. At least one 24-h dietary recall was obtained for two-thirds of the children. Blood pressure and anthropometry were assessed in more than 90%. A 3-day accelerometry was performed in 46%, motor fitness was assessed in 41%, cardiorespiratory fitness in 35% and ∼11% participated in taste perception tests. The proportion of children donating venous blood, urine and saliva was 57, 86 and 88%, respectively.
Conclusion:
The IDEFICS cohort provides valuable data to investigate the interplay of social, environmental, genetic, physiological and behavioural factors in the development of major diet- and lifestyle-related disorders affecting children at present.
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