Inter-individual differences in the nutrition response:from research to recommendations

The 2019 Nutrition Society Spring Conference, which convened in Dundee, focused on the challenges presented by inter-individual differences in the responses to nutrition and in conducting nutritional research. The programme brought together national and international experts to discuss the collective evidence on inter-individual nutritional responses and impacts on health. Speakers and delegates from across the UK, Europe and the USA debated new methods of conducting research in nutrition and discussed the development of appropriate dietary interventions to maintain health and prevent disease in diverse populations. Symposium 1 focused on the effects of ethnicity on nutrient availability and type 2 diabetes and cardio-metabolic disease. Symposium 2 explored sex differences in nutrient availability and health and metabolism. The final symposium examined genetic and phenotypic variation, nutrition and health. The meeting ended with a panel discussion about how we take research to recommendations and concluded with a need to consider inter-individual differences in planning, conducting and analysing nutritional research.</p

The relationship between multiple sleep dimensions and obesity in adolscents:A systematic review

Sleep is an involuntary behaviour, biologically fundamental to survival and wellbeing. However, sleep is increasingly neglected, with significant health implications. Recent research has identified associations between sleep duration, quality, timing and risk of overweight/obesity in children and adults. The aim of this review was to systematically identify and examine research that investigates the relationships between multiple objective and subjective sleep outcomes and objective adiposity measures in adolescents. A systematic review of literature, published to December 2022, was conducted using ten bibliographic databases. Search terms included objective and subjective sleep/circadian rhythm outcomes, objective adiposity measurements, and adolescents aged 8–18 years. Eighty-nine studies were included in the final review. Sleep outcomes were synthesized into three sleep domains: pre-sleep, during sleep and post-sleep outcomes. In summary, pre-sleep outcomes (including poor sleep hygiene, later chronotype and increased variability and later sleep timings) and increased sleep disturbance are consistently significantly associated with increased obesity and adiposity in adolescents. The relationship between during-sleep outcomes (sleep quality and efficiency) with adiposity and obesity measures was mixed. These findings suggest that adapting an individual’s schedule to best suit chronotype preference and improving sleep hygiene, including a consistent bedtime routine, could reduce adiposity and obesity in adolescents.Publisher PDFPeer reviewe

A qualitative study of young peoples’ thoughts and attitudes to follow a more plant-based diet

Funding: This work was supported by the University of St Andrews.Plant-based diets (PBDs) refer to dietary habits that reduce the consumption of animal-based products and increase the consumption of nutritionally rich plant foods. PBD’s have been shown to provide significant health benefits, such as reducing obesity and improving psychological wellbeing, and are environmentally friendly. However, few studies have investigated factors that influence young people’s thoughts and attitudes toward following a PBD in western societies, particularly in the United Kingdom. Understanding these factors may benefit public health interventions that encourage the consumption of more fruit and vegetables. The aim of this study was to explore the factors that affect young people’s intentions toward following a PBD. Twenty-one young people (18–24 years) participated in this qualitative study. Participants were asked about their views of PBDs in a semi-structured interview. Thematic analysis was utilized to explore views and the barriers and facilitators to following a PBD. The Theory of Planned Behavior (TPB) was used as a framework to organise the findings. Within attitudes, the sub-themes identified were an awareness of a healthy diet, environmental concerns, health concerns and distrust, perceptions of PBDs and associated stereotypes, perceived restriction and lack of enjoyment, and need for education. Within subjective norms, the sub-themes identified were cultural and familial norms, peer influence, and exposure through social media. Within perceived behavioral control (PBC), the sub-themes identified were a lack of independence and parental control, lack of knowledge and perceived difficulty, lack of inclusiveness and accessibility, and inconvenience. Overall, the findings suggest that increased provision of education and knowledge about PBDs to young people, and widening access to PBDs, could encourage and help improve their understanding and intention to follow this dietary style. Tailored health promotion strategies, which also consider additional barriers and facilitators found within this study, could motivate young people to consume a more PBD.Publisher PDFPeer reviewe

The use of behaviour change techniques within breastfeeding maintenance interventions : a systematic review

This review will be conducted as part of a Qualification in Health Psychology (Stage 2) being undertaken by Calum McHale, whose post is funded by NHS Lothian and NHS Education for Scotland (NES).Literature ReviewPublisher PD

Direct observation of weight-related communication in primary care : a systematic review

Funding: Review was carried out as part of a PhD funded by the University of St Andrews 600th Anniversary Scholarship.Background. Primary care is ideally placed to play an effective role in patient weight management however patient weight is seldom discussed in this context. A synthesis of studies that directly observe weight discussion in primary care is required to more comprehensively understand and improve primary care weight-related communication. Objective. To systematically identify and examine primary care observational research that investigates weight-related communication and its relationship to patient weight outcomes. Methods. A systematic review of literature published up to August 2015, using seven electronic databases (including MEDLINE, Scopus, and PsycINFO), was conducted using search terms such as overweight, obese, doctor patient communication. Results. Twenty papers were included in the final review. Communication analysis focused predominantly on practitioner use of specific patient-centred communication. Practitioner use of motivational interviewing was associated with improved patient weight-related outcomes, including patient weight loss and increased patient readiness to lose weight; however few studies measured patient weight-related outcomes. Conclusion. Studies directly observing weight-related communication in primary care are scarce and limited by a lack of focus on patient communication and patient weight-related outcomes. Future research should measure practitioner and patient communications during weight discussion, and their impact on patient weight-related outcomes. This knowledge may inform the development of a communication intervention to assist practitioners to more effectively discuss weight with their overweight and/or obese patients.PostprintPeer reviewe

An analysis of directly observed weight communication processes between primary care practitioners and overweight patients

This research was funded by a University of St Andrews 600th Anniversary Doctoral Scholarship.Objective To analyse weight-related communication prevalence and processes (content/context) between primary care practitioners (PCPs) and overweight patients within routine primary healthcare consultations. Methods Consultations between 14 PCPs and 218 overweight patients (BMI ≥25 kg/m2) were video recorded. Weight communication was coded using the Roter Interaction Analysis System (RIAS) and the novel St Andrews Issue Response Analysis System (SAIRAS). Communication code frequencies were analysed. Results Weight discussion occurred in 25% of consultations with overweight patients; 26% of these had weight-related consultation outcomes (e.g. weight-related counselling and referrals, stated weight-related intention from patients). Weight discussions were more likely to occur if PCPs provided space to patient attempts to discuss weight (p = 0.013). Longer weight discussions (p < 0.001) and contextualising weight as problematic when PCP/patient-initiated weight discussion (p < 0.001) were associated with weight-related consultation outcomes. Conclusion Weight was rarely discussed with overweight patients, however PCP space provision to patient weight-discussion initiation attempts increased weight discussion. When weight was discussed, increased time and/or contextualising weight as a problem increased the likelihood of weight-related consultation outcomes. Practical implication PCP use of specific communication approaches when discussing, contextualising and responding to patient weight may facilitate weight-related discussion and consultation outcomes and could lead to more effective patient weight management.PostprintPeer reviewe

A social norms and identity approach to increasing fruit and vegetable intake of undergraduate students in the United Kingdom

The funding for open access was supported by the University of St Andrews.This study investigated the influence of descriptive norm messages that either communicated that university students eat a sufficient amount of fruit and vegetable (F&V) or that they do not, on F&V consumption, and whether or not any effects are moderated by student identification. An online 2 (Norm: ‘Sufficient’/‘Insufficient’) x 2 (Identification: ‘Low’/‘High’) experimental design was employed. Infographics containing ‘sufficient’/‘insufficient’ F&V intake descriptive norms were presented. An identification manipulation was employed to create ‘high’/‘low’ student identifiers. F&V intake intentions were assessed after the manipulations; self-reported F&V intake was reported at 2 days post-intervention. UK undergraduate students (N=180) reported intake intentions, of which 112 (62%) completed the behavioral follow-up. Participants were predominantly white female students from Scottish universities, mean age 20.4 (±1.6) years. Baseline mean F&V consumption was high (4.5±2.8). There were no significant main effects of Norm or Identification manipulations on F&V intentions and intake. Significant norm×identification interactions were revealed for fruit intake intentions and vegetable intake at follow-up, indicating half portion differences (~40g) between groups. Ironic effects were observed for ‘high’ identifiers, who neither intended to, nor acted in accordance with group norms; ‘low’ student identifiers intended to and followed group norms, whereby the ‘sufficient’/‘low’ group intended to consume significantly more fruit portions, and consumed more vegetables than the ‘insufficient’/‘low’ group. Given the half-portion differences between groups resulting from the norm×identification interactions, future research on a larger sample of young adults with low F&V intake is warranted to further explore the conditions under which moderating effects of identification are observed and the underlying mechanisms.Publisher PDFPeer reviewe

‘You just eyeball it’:Parent and nursery staff perceptions and influences on child portion size: A reflexive thematic analysis

Background: Childhood obesity is one of the most serious public health epidemics of the 21st century. Observational studies report that increases in portion size (PS) have occurred in parallel with levels of obesity. Increased PSs of high-energy-dense foods can promote overeating, and without compensatory behaviours, can contribute to childhood obesity. Caregivers make decisions about PSs for children in the home and nursery environment, thus are gatekeepers to child food intake. Understanding caregiver PS decisions can aid in the best practice of PS provision to young children. The aim of this study was to explore parent and nursery staff influences on child PS selection and their suggestions for useful tools/strategies in PS decisions. Methods: A qualitative design was employed using focus group discussions (FGDs) with parents and nursery staff of children aged 3–5 years. FGDs were employed given their ability to generate rich data, as well as permit the exploration of collective perceptions, attitudes, behaviours and experiences. Data were analysed using an inductive, semantic approach to reflexive thematic analysis. Results: Four FGDs were conducted: two with parents (n = 13), two with nursery staff (n = 17). Four overarching themes were derived: (i) awareness of PS guidelines; (ii) control over PS; (iii) social influences on children's eating behaviours; (iv) child-specific, social and external factors influencing parent and nursery staff PS decisions. Additionally, participants discussed tools/strategies they believe would be useful in PS decisions. Conclusion: Data from the themes suggest that caregiver control, social, child-specific and external factors are more influential than PS guidelines in both parent and nursery staff PS decisions for young children aged 3–5 years. These findings can inform future childhood obesity prevention initiatives focussed on improving parent and nursery staff provision/use of age-appropriate PSs.</p

'You just eyeball it’: parent and nursery staff perceptions and influences on child portion size : a reflexive thematic analysis

Funding: This project was supported by the MSc Health Psychology programme at the University of St Andrews.Background Childhood obesity is one of the most serious public health epidemics of the 21st century. Observational studies report that increases in portion size (PS) have occurred in parallel with levels of obesity. Increased PSs of high-energy-dense foods can promote overeating, and without compensatory behaviours, can contribute to childhood obesity. Caregivers make decisions about PSs for children in the home and nursery environment, thus are gatekeepers to child food intake. Understanding caregiver PS decisions can aid in the best practice of PS provision to young children. The aim of this study was to explore parent and nursery staff influences on child PS selection and their suggestions for useful tools/strategies in PS decisions. Methods A qualitative design was employed using focus group discussions (FGDs) with parents and nursery staff of children aged 3–5 years. FGDs were employed given their ability to generate rich data, as well as permit the exploration of collective perceptions, attitudes, behaviours and experiences. Data were analysed using an inductive, semantic approach to reflexive thematic analysis. Results Four FGDs were conducted: two with parents (n = 13), two with nursery staff (n = 17). Four overarching themes were derived: (i) awareness of PS guidelines; (ii) control over PS; (iii) social influences on children's eating behaviours; (iv) child-specific, social and external factors influencing parent and nursery staff PS decisions. Additionally, participants discussed tools/strategies they believe would be useful in PS decisions. Conclusion Data from the themes suggest that caregiver control, social, child-specific and external factors are more influential than PS guidelines in both parent and nursery staff PS decisions for young children aged 3–5 years. These findings can inform future childhood obesity prevention initiatives focussed on improving parent and nursery staff provision/use of age-appropriate PSs.Peer reviewe

Primary care patient and practitioner views of weight and weight-related discussion : a mixed methods study

Funding: University of St Andrews 600th Anniversary PhD Scholarship.Objective To understand the beliefs that primary care practitioners (PCPs) and patients with overweight and obesity have about obesity and primary care weight management in Scotland. Setting Seven National Health Service (NHS) Scotland primary care centres. Participants A total of 305 patients and 14 PCPs (12 general practitioners; two practice nurses) participated. Design and methodology A cross-sectional mixed-methods study. PCPs and patients completed questionnaires assessing beliefs about obesity and primary care weight communication and management. Semi-structured interviews were conducted with PCPs to elaborate on questionnaire topics. Quantitative and qualitative data were synthesised to address study objectives. Results (1) Many patients with overweight and obesity did not accurately perceive their weight or risk of developing weight-related health issues; (2) PCPs and patients reported behavioural factors as the most important cause of obesity, and medical factors as the most important consequence; (3) PCPs perceive their role in weight management as awareness raising and signposting, not prevention or weight monitoring; (4) PCPs identify structural and patient-related factors as barriers to weight communication and management, but not PCP factors. Conclusions Incongruent and/or inaccurate beliefs held by PCPs and patient may present barriers to effective weight discussion and management in primary care. There is a need to review, standardise and clarify primary care weight management processes in Scotland. Acknowledging a shared responsibility for obesity as a disease may improve outcomes for patients with overweight and obesity.Publisher PDFPeer reviewe