. O. Development and . Paris, Obesity Update URL, 2012.

R. France and . Neuilly-sur-seine, Enquête épidémiologique nationale sur le surpoids et l'obésité, 2012.

C. B. Frederick, K. Snellman, and R. D. Putnam, Increasing socioeconomic disparities in adolescent obesity, Proc Natl Acad Sci, vol.111, issue.4, pp.1338-1342, 2014.

C. Fradkin, J. L. Wallander, M. N. Elliott, S. Tortolero, P. Cuccaro et al., Associations between socioeconomic status and obesity in diverse, young adolescents: variation across race/ethnicity and gender, Health Psychol, vol.34, issue.1, pp.1-9, 2015.

K. Castetbon, S. Hercberg, V. Deschamps, B. Salanave, M. Vernay et al.,

, Situation nutritionnelle en France en selon les indicateurs d'objectif et les repères du Programme national nutrition santé, 2006.

. Inserm and . Paris, INSERM; 2014. Inégalités sociales de santé en lien avec l'alimentation et l'activité physique URL

S. Capewell and H. Graham, Will cardiovascular disease prevention widen health inequalities, PLoS Med, vol.7, issue.8, p.1000320, 2010.

T. Lorenc, M. Petticrew, V. Welch, and P. Tugwell, What types of interventions generate inequalities? Evidence from systematic reviews, J Epidemiol Community Health, vol.67, issue.2, pp.190-193, 2013.

. Haut-conseil-de-la-santé-publique and . Paris, Haut Conseil de la santé publique, Les Inégalités Sociales de Santé: Sortir de la Fatalité URL, 2009.

D. Capurro, K. Cole, M. I. Echavarría, J. Joe, T. Neogi et al., The use of social networking sites for public health practice and research: a systematic review, J Med Internet Res, vol.16, issue.3, p.79, 2014.

L. K. Militello, S. A. Kelly, and B. M. Melnyk, Systematic review of text-messaging interventions to promote healthy behaviors in pediatric and adolescent populations: implications for clinical practice and research, Worldviews Evid Based Nurs, vol.9, issue.2, pp.66-77, 2012.

M. Bardus, J. R. Smith, L. Samaha, and C. Abraham, Mobile phone and Web 2.0 technologies for weight management: a systematic scoping review, J Med Internet Res, vol.17, issue.11, p.259, 2015.

M. C. Gibbons, L. Fleisher, R. E. Slamon, S. Bass, V. Kandadai et al., Exploring the potential of Web 2.0 to address health disparities, J Health Commun, vol.16, issue.1, pp.77-89, 2011.

L. Irvine, D. W. Falconer, C. Jones, I. W. Ricketts, B. Williams et al., Can text messages reach the parts other process measures cannot reach: an evaluation of a behavior change intervention delivered by mobile phone?, PLoS One, vol.7, issue.12, p.52621, 2012.

R. S. Kerrison, H. Shukla, D. Cunningham, O. Oyebode, and E. Friedman, Text-message reminders increase uptake of routine breast screening appointments: a randomised controlled trial in a hard-to-reach population, Br J Cancer, vol.112, issue.6, pp.1005-1010, 2015.

R. Mychasiuk and K. Benzies, Facebook: an effective tool for participant retention in longitudinal research, Child Care Health Dev, vol.38, issue.5, pp.753-756, 2012.

W. S. Chou, Y. M. Hunt, E. B. Beckjord, R. P. Moser, and B. W. Hesse, Social media use in the United States: implications for health communication, J Med Internet Res, vol.11, issue.4, p.48, 2009.

E. Z. Kontos, K. M. Emmons, E. Puleo, and K. Viswanath, Communication inequalities and public health implications of adult social networking site use in the United States, J Health Commun, vol.15, issue.3, pp.216-235, 2010.

P. Mercklé and O. S. Reset, La stratification sociale des pratiques numériques des adolescents URL, 2012.

. Zhaw, ;. Zürich, . James-jeunes, and U. Suisse, Züricher Hochschule für Angewandte Wissenschaften, 2012.

S. M. Sawyer, A. Zalan, and L. M. Bond, Telephone reminders improve adolescent clinic attendance: a randomized controlled trial, J Paediatr Child Health, vol.38, issue.1, pp.79-83, 2002.

J. Car, I. Gurol-urganci, T. De-jongh, V. Vodopivec-jamsek, and R. Atun, Mobile phone messaging reminders for attendance at healthcare appointments, Cochrane Database Syst Rev, vol.7, p.7458, 2012.

C. E. Branson, P. Clemmey, and P. Mukherjee, Text message reminders to improve outpatient therapy attendance among adolescents: a pilot study, Psychol Serv, vol.10, issue.3, pp.298-303, 2013.

N. Boksmati, K. Butler-henderson, A. K. Sahama, and T. , The effectiveness of SMS reminders on appointment attendance: a meta-analysis, J Med Syst, vol.40, issue.4, p.90, 2016.

J. Morris, W. Wang, L. Wang, K. M. Peddecord, and M. H. Sawyer, Comparison of reminder methods in selected adolescents with records in an immunization registry, J Adolesc Health, vol.56, issue.5, pp.27-32, 2015.

M. Madden, A. Lenhart, M. Duggan, S. Cortesi, U. Grasser et al., Teens and Technology, 2013.

G. Mascheroni and A. Cuman, Net Children Go Mobile, Net Children Go Mobile Final Report URL, 2014.

L. Laranjo, A. Arguel, A. L. Neves, A. M. Gallagher, R. Kaplan et al., The influence of social networking sites on health behavior change: a systematic review and meta-analysis, J Am Med Inform Assoc, vol.22, issue.1, pp.243-256, 2015.
URL : https://hal.archives-ouvertes.fr/hal-01744025

T. Coëffé and . Blogdumoderateur, Étude Ipsos : les jeunes, Internet et les réseaux sociaux URL, 2015.

G. M. Turner-mcgrievy and D. F. Tate, Weight loss social support in 140 characters or less: use of an online social network in a remotely delivered weight loss intervention, Transl Behav Med, vol.3, issue.3, pp.287-294, 2013.

J. Poirier and N. K. Cobb, Social influence as a driver of engagement in a web-based health intervention, J Med Internet Res, vol.14, issue.1, p.36, 2012.

M. A. Napolitano, S. Hayes, G. G. Bennett, A. K. Ives, and G. D. Foster, Using Facebook and text messaging to deliver a weight loss program to college students, Obesity (Silver Spring), vol.21, issue.1, pp.25-31, 2013.

H. Ashrafian, T. Toma, L. Harling, K. Kerr, T. Athanasiou et al., Social networking strategies that aim to reduce obesity have achieved significant although modest results. Health Aff (Millwood), vol.33, pp.1641-1647, 2014.

D. N. Cavallo, D. F. Tate, D. S. Ward, R. F. Devellis, L. M. Thayer et al., Social support for physical activity-role of Facebook with and without structured intervention, Transl Behav Med, vol.4, issue.4, pp.346-354, 2014.

S. A. Moorhead, D. E. Hazlett, L. Harrison, J. K. Carroll, A. Irwin et al., A new dimension of health care: systematic review of the uses, benefits, and limitations of social media for health communication, J Med Internet Res, vol.15, issue.4, p.85, 2013.

L. C. Raaijmakers, S. Pouwels, K. A. Berghuis, and S. W. Nienhuijs, Technology-based interventions in the treatment of overweight and obesity: a systematic review, Appetite, vol.95, pp.138-151, 2015.

L. M. Yonker, S. Zan, C. V. Scirica, K. Jethwani, and T. B. Kinane, Friending" teens: systematic review of social media in adolescent and young adult health care, J Med Internet Res, vol.17, issue.1, p.4, 2015.

K. Legrand, E. Lecomte, J. Langlois, L. Muller, L. Saez et al., Reducing social inequalities in access to overweight and obesity care management for adolescents: the PRALIMAP-INÈS trial protocol and inclusion data analysis, Contemp Clin Trials Commun, vol.7, pp.141-157, 2017.

C. E. Currie, R. A. Elton, J. Todd, and S. Platt, Indicators of socioeconomic status for adolescents: the WHO Health Behaviour in School-aged Children Survey, Health Educ Res, vol.12, issue.3, pp.385-397, 1997.

J. Preece and B. Shneiderman, The reader-to-leader framework: motivating technology-mediated social participation, AIS Trans Hum-Comput Interact, vol.1, issue.1, pp.13-32, 2009.

Q. Yang, Are social networking sites making health behavior change interventions more effective? A meta-analytic review, J Health Commun, vol.22, issue.3, pp.223-233, 2017.

S. L. Pagoto, M. E. Waring, K. L. Schneider, J. L. Oleski, E. Olendzki et al., Twitter-delivered behavioral weight-loss interventions: a pilot series, JMIR Res Protoc, vol.4, issue.4, p.123, 2015.

A. De-la-peña and C. Quintanilla, Share, like and achieve: the power of Facebook to reach health-related goals, Int J Consum Stud, vol.39, issue.5, pp.495-505, 2015.

D. W. Hosmer and S. Lemeshow, Applied Logistic Regression, p.978, 2004.

, Institut national de la statistique et des études économiques. Paris: INSEE; 2014. Recensement de la Population-88 Vosges URL

. Tns-sofre and . Paris, TNS Sofres; 2009. Les adolescents, leur téléphone portable, et l'Internet mobile URL

G. Mascheroni and K. Ólafsson, The mobile Internet: access, use, opportunities and divides among European children, vol.18, pp.1657-1679, 2015.

A. K. Lindqvist, C. Kostenius, and G. Gard, Peers, parents and phones-Swedish adolescents and health promotion, Int J Qual Stud Health Well-Being, vol.7, issue.18, 2012.

C. R. Ahlers-schmidt, J. T. Jones, A. Chesser, and K. Weeks, Evaluating opportunities for text message communication: a survey of parents and teens, Telemed J E Health, vol.19, issue.9, pp.711-713, 2013.

E. Michalak and G. Murray, If you build it, will they come? Opening access to a new online bipolar wellness centre, Web-based Support for Self-Management in Bipolar Disorder: New Interventions and New Horizons, pp.22-23, 2015.

J. Syred, C. Naidoo, S. C. Woodhall, and P. Baraitser, Would you tell everyone this? Facebook conversations as health promotion interventions, J Med Internet Res, vol.16, issue.4, p.108, 2014.

J. Kite, B. C. Foley, A. C. Grunseit, and B. Freeman, Please like me: Facebook and public health communication, PLoS One, vol.11, issue.9, p.162765, 2016.

C. Young, Community management that works: how to build and sustain a thriving online health community, J Med Internet Res, vol.15, issue.6, p.119, 2013.

I. Bastard, D. Cardon, R. Charbey, J. P. Cointet, C. Prieur et al., pour quoi faire? Configurations d'activités et structures relationnelles [Facebook, what for? Activity configurations and relational structures, vol.8, pp.57-82, 2017.

V. Lethiais and K. Roudaut, Les amitiés virtuelles dans la vie réelle, Réseaux, vol.164, issue.6, pp.13-49, 2010.

A. Moreau, O. Roustit, E. Chauchard, and H. Chabrol, L'usage de Facebook et les enjeux de l'adolescence: une étude qualitative, Neuropsychiatr Enfance Adolesc, vol.60, issue.6, pp.429-434, 2012.

P. Amey and S. Salerno, Les adolescents sur Internet: expériences relationnelles et espace d'initiation, Rev Fr Sci Inf Commun, issue.6, 2015.