Online health promoting communities : Design, implementation and formative evaluation of an intervention

Abstract: In Sweden, obesity among children has not yet reached the epidemic proportions reported from other parts of the world. However, among adolescents, being overweight and self-consciousness regarding body shape, diet and exercise influence social, psychological and physical health. Obese children may be in need of secondary prevention because of adverse effects related to obesity, but it is less obvious exactly what to prevent in the rest of the population. General interventions to prevent overweight and obesity are problematic because of the lack of associations for general application; there is a need for personalized community-based health promotion. Online interventions are especially suitable considering the amount of time adolescents spend online.This thesis takes a design approach to interventions and describes the design of an online health promoting community as a path to health promotion among adolescents. The first two studies use data from the first 15 years of a 1991 cohort living in Östergötland to determine the predictability of obesity from childhood body mass index and to investigate interventions and available evidence to suggest appropriate interventions. The next two studies use these findings to design and formatively evaluate a health promotion intervention.In Study I we found reasons for offering population-based interventions systematically from 5 years of age. It would be worthwhile identifying at an early age those relatively few children with substantially increased risk of maintaining obesity in adulthood and offering them interventions; but interventions must be avoided when they are not necessary. The projections in Study II indicate that more specified interventions would benefit adolescents without increasing the costs. In Study III, we found than an online health promoting community can be designed simply at relatively low cost and can be negotiated to satisfy both the needs of the user community and public health goals and service capabilities. In Study IV, a checklist for pre-launch evaluation of online health promoting communities was developed and the most important result was the delicate balance between community autonomy and quality control. Future studies addressing health outcome constructs for use in online health promoting community evaluations are warranted.