Mains characteristics and participation rate of European adolescents included in the HELENA study. - Inserm - Institut national de la santé et de la recherche médicale Access content directly
Journal Articles Archives of Public Health Year : 2012

Mains characteristics and participation rate of European adolescents included in the HELENA study.

Inge Huybrechts
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  • PersonId : 894802
Stefaan de Henauw
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  • PersonId : 896294
Michael Sjöström
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  • PersonId : 909819
Sabine Dietrich
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  • PersonId : 932333
Maria Plada
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  • PersonId : 932335
Dénes Molnar
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  • PersonId : 909850
Chantal Gilbert
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  • PersonId : 932337
Luis Moreno
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  • PersonId : 909818


ABSTRACT: OBJECTIVE: To describe the study population and the key nutritional status variables in male and female adolescents involved in the HELENA study and to evaluate participation and response rate. METHODS: A multi-stage random cluster sampling with a target sample of 3000 adolescents aged [12.5 to 17.5[ years, stratified for geographical location and age, was carried out. Information for participants and non-participants (NP) was compared, and participation and response rates to specific questionnaires were discussed. RESULTS: 3,865 adolescents aged [12.5 to 17.5[ years (1,845 females) participated in the HELENA study, of whom 1,076 (568 females) participated in the blood sampling. 3,528 (1,845 females) adolescents were finally kept for statistical analysis. Participation rates for the schools and classes differed importantly between countries. The participation rate of pupils within the participating classes also differed importantly between countries. Sex ratio, mean age and BMI were similar between NP and participating adolescents within each centre, and in the overall sample. For all the questionnaires included in the database, the response rate of questionnaires was high (more than 80% of questions were completed). CONCLUSION: From this study it could be concluded that participation rate differed importantly between countries, though no bias could be identified when comparing the key study variables between participants and non-participants. Response rate for questionnaires was very high. Future studies investigating lifestyle and health in adolescents can optimize their methods when considering the opportunities and barriers observed in the HELENA study.
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Dates and versions

inserm-00748954 , version 1 (06-11-2012)



Laurent Béghin, Inge Huybrechts, German Vicente-Rodríguez, Stefaan de Henauw, Frédéric Gottrand, et al.. Mains characteristics and participation rate of European adolescents included in the HELENA study.. Archives of Public Health, 2012, 70 (1), pp.14. ⟨10.1186/0778-7367-70-14⟩. ⟨inserm-00748954⟩
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