OBJECTIVE: To provide an overview of the Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study (HELENA-CSS) design, with particular attention to its quality control procedures. Other important methodological aspects are described in detail throughout this supplement. DESIGN: Description of the HELENA-CSS sampling and recruitment approaches, standardization and harmonization processes, data collection and analysis strategies and quality control activities. RESULTS: The HELENA-CSS is a multi-centre collaborative study conducted in European adolescents located in urban settings. The data management systems, quality assurance monitoring activities, standardized manuals of operating procedures and training and study management are addressed in this paper. Various quality controls to ensure collection of valid and reliable data will be discussed in this supplement, as well as quantitative estimates of measurement error. CONCLUSION: The great advantage of the HELENA-CSS is the strict standardization of the fieldwork and the blood analyses, which precludes to a great extent the kind of immeasurable confounding bias that often interferes when comparing results from isolated studies.
OBJECTIVE: To provide an overview of the Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study (HELENA-CSS) design, with particular attention to its quality control procedures. Other important methodological aspects are described in detail throughout this supplement. DESIGN: Description of the HELENA-CSS sampling and recruitment approaches, standardization and harmonization processes, data collection and analysis strategies and quality control activities. RESULTS: The HELENA-CSS is a multi-centre collaborative study conducted in European adolescents located in urban settings. The data management systems, quality assurance monitoring activities, standardized manuals of operating procedures and training and study management are addressed in this paper. Various quality controls to ensure collection of valid and reliable data will be discussed in this supplement, as well as quantitative estimates of measurement error. CONCLUSION: The great advantage of the HELENA-CSS is the strict standardization of the fieldwork and the blood analyses, which precludes to a great extent the kind of immeasurable confounding bias that often interferes when comparing results from isolated studies.
Authors: Tatiana Sadalla Collese; Augusto César Ferreira De Moraes; Juan Miguel Fernández-Alvira; Nathalie Michels; Stefaan De Henauw; Yannis Manios; Odysseas Androutsos; Anthony Kafatos; Kurt Widhalm; Myriam Galfo; Laurent Beghin; Michael Sjöström; Raquel Pedrero-Chamizo; Heráclito Barbosa Carvalho; Luis A Moreno Journal: Int J Public Health Date: 2018-12-04 Impact factor: 3.380
Authors: Diego Moliner-Urdiales; Francisco B Ortega; Germán Vicente-Rodriguez; Juan P Rey-Lopez; Luis Gracia-Marco; Kurt Widhalm; Michael Sjöström; Luis A Moreno; Manuel J Castillo; Jonatan R Ruiz Journal: Eur J Appl Physiol Date: 2010-04-07 Impact factor: 3.078
Authors: K J Duffey; I Huybrechts; T Mouratidou; L Libuda; M Kersting; T De Vriendt; F Gottrand; K Widhalm; J Dallongeville; L Hallström; M González-Gross; S De Henauw; L A Moreno; B M Popkin Journal: Eur J Clin Nutr Date: 2011-09-28 Impact factor: 4.016
Authors: I Iglesia; A M Santaliestra-Pasías; S Bel-Serrat; T Sadalla-Collese; M L Miguel-Berges; L A Moreno Journal: Eur J Clin Nutr Date: 2015-12-16 Impact factor: 4.016
Authors: L Gracia-Marco; G Vicente-Rodríguez; J A Casajús; D Molnar; M J Castillo; L A Moreno Journal: Eur J Appl Physiol Date: 2011-03-11 Impact factor: 3.078
Authors: A M Santaliestra-Pasías; T Mouratidou; I Huybrechts; L Beghin; M Cuenca-García; M J Castillo; M Galfo; L Hallstrom; A Kafatos; Y Manios; A Marcos; D Molnar; M Plada; R Pedrero-Chamizo; K Widhalm; I De Bourdeaudhuij; L A Moreno Journal: Eur J Clin Nutr Date: 2013-09-18 Impact factor: 4.016
Authors: Idoia Labayen; Jonatan R Ruiz; Germán Vicente-Rodríguez; Dominique Turck; Gerardo Rodríguez; Aline Meirhaeghe; Denes Molnár; Michael Sjöström; Manuel J Castillo; Frederic Gottrand; Luis A Moreno Journal: Diabetes Care Date: 2009-07-29 Impact factor: 17.152
Authors: Karianne Solaas; Vanessa Legry; Kjetil Retterstol; Paul R Berg; Kirsten B Holven; Jean Ferrières; Philippe Amouyel; Sigbjorn Lien; Javier Romeo; Jara Valtueña; Kurt Widhalm; Jonatan R Ruiz; Jean Dallongeville; Serena Tonstad; Helge Rootwelt; Bente Halvorsen; Marit S Nenseter; Kare I Birkeland; Per M Thorsby; Aline Meirhaeghe; Hilde I Nebb Journal: BMC Med Genet Date: 2010-10-12 Impact factor: 2.103