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Title: Factors determining the uptake and effectiveness of personalised nutritional interventions
Author: Rankin , Audrey Lucinda
ISNI:       0000 0004 7653 0964
Awarding Body: Ulster University
Current Institution: Ulster University
Date of Award: 2015
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Personalised nutrition aims to provide advice based on dietary, phenotypic and genotypic data. Given end-users of personalised nutrition will be the general public, understanding their needs is important for the success of this novel technology. The work described in this thesis aims to understand the public perspective of personalised nutrition and to establish best practice, services and policies which will enable personalised nutrition. Focus groups (N=64) conducted in the United Kingdom and Ireland, suggested that the constructs of Social Cognitive Theory would provide an alternative model for personalised nutrition delivery. Promotion of self-efficacy through self-regulation (e.g. self-monitoring), may encourage dietary behaviour change. Survey by questionnaire developed from previous qualitative research was completed by a representative sample from 9 EU countries (N=9381). Findings suggested that demographic factors (e.g. sex, age and education level) influence the degree to which individuals related to expected outcomes and perceived barriers to personalised nutrition uptake. Personalised nutrition providers should consider promoting personalised nutrition according to country of residence, sex, age and education level of the potential users. Investigation of food choice motives found preferences for sensory appeal and price to negatively impact intention to adopt personalised nutrition. Those highly motivated by health, weight control and mood held positive attitudes towards personalised nutrition. Personalised nutrition services should consider these factors, in order to provide services which are affordable and the public will want to use. Finally, response to an online Proof of Principle (PoP) Randomised Controlled Trial (N=1285), comparing differing levels of personalisation and feedback intensity of personalised nutrition, found that attrition was associated with age (younger), sex (female) and lower healthy eating habit scores. There was an increase in nutrition self-efficacy and healthy eating habit scores, but internal (decreased) and external (increased) health locus of control were negatively impacted upon. These findings suggest that, users’ psychological characteristics may have an impact upon compliance and the success of future personalised nutritional interventions or services. Given the increasing epidemic of obesity worldwide and the global burden of NCD, these findings could have important public health implications. Word count = 338.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available