yes / Background/Aims: Personalised nutrition has potential to revolutionise dietary health promotion if accepted by the general public. We studied trust and preferences regarding personalised nutrition services, how they influence intention to adopt these services, and cultural and social differences therein. Methods: A total of 9381 participants were quota sampled to be representative for each of nine EU countries (Germany, Greece, Ireland, Poland, Portugal, Spain, Netherlands, UK, Norway) and surveyed by questionnaire assessing their intention to adopt personalised nutrition, trust in service regulators and information sources, and preferences for service providers and information channels. Results: Trust and preferences significantly predicted intention to adopt personalised nutrition. Higher trust in the local department of healthcare was associated with lower intention to adopt personalised nutrition. General practitioners were the most trusted of service regulators, except for in Portugal, where consumer organisations and universities were most trusted. In all countries, family doctors were the most trusted information providers. Trust in the National Health Service as service regulator and information source showed high variability across countries. Despite its highest variability across countries, personal meeting was the preferred communication channel except in Spain (where an automated internet service was preferred). General practitioners were the preferred service providers, except in Poland, where dietitians and nutritionists were preferred. The preference for dietitians and nutritionists as service providers highly varied across countries. Conclusion: These results may assist in informing local initiatives to encourage acceptance and adoption of country specific tailored personalised nutrition services therefore benefiting individual and public health.

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-07-30T15:07:27Z No. of bitstreams: 1 OLYMPIO CIPRIANO DA SILVA FILHO - DISSERTAÇÃO PPGEE 2007..pdf: 1354330 bytes, checksum: 4271b1c8fe8556d562518fb586e85376 (MD5) / Made available in DSpace on 2018-07-30T15:07:27Z (GMT). No. of bitstreams: 1 OLYMPIO CIPRIANO DA SILVA FILHO - DISSERTAÇÃO PPGEE 2007..pdf: 1354330 bytes, checksum: 4271b1c8fe8556d562518fb586e85376 (MD5) Previous issue date: 2007-12-14 / Com o desenvolvimento tecnológico a computação está cada vez mais integrada ao cotidiano das pessoas. Esta integração faz parte de um novo paradigma da computação: o da Computação Pervasiva. Neste paradigma, a computação está sempre a disposição do usuário, em qualquer lugar, a qualquer momento, através de ambientes repletos de dispositivos computacionais embutidos em uma grande variedade de objetos do dia-a-dia das pessoas como, automóveis, telefones, etc. Nestes ambientes, os dispositivos interagem entre si através de serviços devendo ser capazes lidar com a grande variedade de protocolos de descoberta de serviços disponíveis. Ainda,essas interações entre os dispositivos podem ocorrer em ambientes sem infra-estrutura de redes de computadores e entre dispositivos que podem agir desonestamente. Neste trabalho, é desenvolvido um modelo para avaliar a confiança nos serviços nos ambientes pervasivos a partir de experiências e recomendações. Este modelo é implementado por um Gerenciador de Informação de Confiança o qual disponibiliza um mecanismo de tomada de decisão para realizar a seleção de clientes e provedores de serviço. Ainda, o Gerenciador de Informação de Confiança é integrado a um middleware para computação pervasiva, o Wings, possibilitando a descoberta de serviços confiáveis. Foram utilizadas simulações e uma aplicação de teste para avaliar o Gerenciador de Informação de Confiança e sua integração ao middleware Wings. A partir dos resultados obtidos observou-se que a solução apresentada se mostrou satisfatória para a utilização em ambientes pervasivos. / The development of technology is integrating computing to people every day life. This integration belongs to a new computing paradigm: the pervasive computing. In this paradigm, the computation is always available, in every place at any time, through environments crowd of computing devices embedded in a great variety of objects like cars,cell phones, etc. In these environments, devices interact through services and should be able to deal with different service announcement solutions available. These interactions can occur without computing network infrastructure andamong malicious devices. In this work, it is developed a model to evaluate service trust in pervasive environments from experiences and recommendations. This model is implemented by a Trust Information Manager that provides a mechanism to make trust based decision. This Trust Information Manager is integrated to a pervasive computing middle ware,called Wings, enabling trusted service discover. Simulations and a test application were used to evaluate theTrust Information Manager and its integration with the Wings middleware. From the results it could be seen that the presented solution is efficient and can be widely used in pervasive computing environments.