Jason C G Halford

Jason C G Halford
University of Leeds · School of Psychology

Doctor of Psychology

About

742
Publications
142,069
Reads
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13,725
Citations
Citations since 2016
147 Research Items
7159 Citations
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201620172018201920202021202202004006008001,0001,2001,400
201620172018201920202021202202004006008001,0001,2001,400
Introduction
Psychologist working in Obesity Practice and Policy. Focus on appetite and eating behaviour and weight management interventions targeting this (behavioral, nutritional, pharmaceutical and surgical - traditional or digital). These include the SATIN & SWEET consortia and the SWITCH intervention. Also work on food insecurity via N8 Agri-food and the iKnowFood project. Policy interests in food insecurity, promotion of unhealthy, food to children and access to effective obesity treatment.
Additional affiliations
January 2012 - present
University of Liverpool
Position
  • SATIN - SATiety INnovation - Project Co-ordinator
Description
  • 8 Million Euro Framework 7 KBBE project with seven Universities, seven SMEs and four industry partners from across Europe.
January 2006 - June 2006
St. Luke's University Health Network
Position
  • Visiting Scientist
September 1997 - September 1999
University of Central Lancashire
Position
  • Lecturer
Education
September 1991 - November 1994
University of Leeds
Field of study
  • Psychopharmacology

Publications

Publications (742)
Article
Full-text available
Purpose Examined associations between sugar-sweetened beverages (SSB), low/no-calorie beverages (LNCB), and fruit juice (FJ) consumption and all-cause mortality in Dutch adults. Methods Data of 118,707 adults participating (mean age = 45 years; 60% was women) the Lifelines Cohort Study were prospectively analyzed. Dietary intake was assessed using...
Article
What is this summary about? This is a summary of a research survey called ACTION Teens. In our survey, 12,987 people from 10 countries answered questions about obesity. They were: 5275 teenagers with obesity, 5389 caregivers of teenagers with obesity, and 2323 doctors who provide medical care for teenagers with obesity. What were the main results...
Article
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Introduction: The aim of this randomised controlled trial (RCT) is to investigate whether prolonged consumption of sweeteners and sweetness enhancers (S&SEs) within a healthy diet will improve weight loss maintenance and obesity-related risk factors and affect safety markers compared with sugar. Methods and analysis: SWEET (S&SEs: prolonged effe...
Article
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Background There is evidence that commercially available behavioural weight management programmes can lead to short-term weight loss and reductions in glycaemia. Here, we aimed to provide the 5-year impact and cost-effectiveness of these interventions compared with a brief intervention. Methods WRAP was a non-blinded, parallel-group randomised con...
Article
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Background Increased weight-related stigma during the COVID-19 pandemic has amplified the need to minimise the impacts on mental wellbeing. We investigated the relationship between the perceived changes in the representation of obesity in the media and mental wellbeing during the pandemic in a sample of people with obesity across 10 European countr...
Conference Paper
Background Weight loss through behavioural weight management interventions can have important health benefits for people with obesity and can be cost-effective if weight loss is maintained long-term. However, concerns have been raised that such interventions may exacerbate health inequalities by being less effective in more disadvantaged groups. In...
Article
Aim In a series of pre-registered online studies, we aimed to elucidate the magnitude of the effect of general sustainability labels on U.K. consumers’ food choices. Methods Four labels were displayed: ‘Sustainably sourced’, ‘Locally sourced’, ‘Environmentally friendly’, and ‘Low greenhouse gas emissions’. To ensure reliable results, contingency v...
Article
Full-text available
Background: There is limited evidence regarding the experiences, challenges, and needs of adolescents living with obesity (ALwO), their caregivers, and healthcare professionals (HCPs). Objectives: The cross-sectional, survey-based global ACTION Teens study aimed to identify perceptions, attitudes, behaviours, and barriers to effective obesity ca...
Article
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Objectives Examine associations between the intake of sugar-sweetened beverages (SSB), low/no-calorie beverages (LNCB), and fruit juice (FJ) and non-alcoholic fatty liver (NAFLD) in 4 population-based studies included in the SWEET project. Methods Data of 42,024 participants from the Lifelines Cohort Study (LCS), NQPlus, PREDIMED-Plus and the Alph...
Article
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Objectives Inconsistencies in prospective studies investigating sugars and sweeteners with health may be partly due to inaccurate self-reported intake estimates. We compared the relative validity of two self-reported dietary methods and urinary biomarkers to estimate the intake of sugars and sweeteners using data of free-living Dutch adults. Metho...
Article
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Background/Methods Prospective studies investigating sweet beverages and body weight associations show inconsistent results. Within the SWEET project, we examined prospective dose-response associations of sugar-sweetened beverages (SSB), low/no-calorie beverages (LNCB), and fruit juice with body weight-related outcomes among 78,286 Dutch adults fol...
Article
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Quality of life is a key outcome that is not rigorously measured in obesity treatment research due to the lack of standardization of patient‐reported outcomes (PROs) and PRO measures (PROMs). The S.Q.O.T. initiative was founded to Standardize Quality of life measurement in Obesity Treatment. A first face‐to‐face, international, multidisciplinary co...
Article
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Objectives: The aim was to investigate the impact of a group-based weight management programme on symptoms of depression and anxiety compared with self-help in a randomised controlled trial (RCT). Method: People with overweight (Body Mass Index [BMI]≥28kg/m2) were randomly allocated self-help (n = 211) or a group-based weight management programm...
Article
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Background The European Association for Endoscopic Surgery Bariatric Guidelines Group identified a gap in bariatric surgery recommendations with a structured, contextualized consideration of multiple bariatric interventions. Objective To provide evidence-informed, transparent and trustworthy recommendations on the use of sleeve gastrectomy, Roux-e...
Article
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(1) Background: There is a substantial lack of knowledge of the biochemical mechanisms by which weight loss and weight regain exert their beneficial and adverse effects, respectively, on cardiometabolic outcomes. We examined associations between changes in circulating metabolites and changes in cardiometabolic risk factors during diet-induced weigh...
Article
Two studies investigating the impact of dried fruits eaten as a snack on weight control were designed to examine the effects of prunes and raisins on appetite (phase 1), and whether prunes undermine weight loss, due to the increase in energy density on drying, when included in a structured weight loss programme (phase 2). Phase 1 compared the effec...
Article
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With the global epidemics of obesity and associated conditions, including type 2 diabetes, metabolic dysfunction-associated fatty liver disease, chronic kidney disease, hypertension, stroke, cardiovascular disease, osteoporosis, cancer, and cognitive changes, the prevalence of multimorbidity is rapidly increasing worldwide. In this Review, a panel...
Article
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Introduction The newer glucose-lowering therapies for type 2 diabetes (T2D), the glucagon-like peptide-1 receptor agonists (GLP1-RAs) and the sodium-glucose co-transporter 2 inhibitors (SGLT2i), have additional clinical benefits beyond improving glycaemic control; promoting weight loss, addressing associated cardiovascular risk factors and reducing...
Article
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Objective: Prospective studies on relationships between hedonic hunger and BMI (Body Mass Index) during weight management are lacking. This study examined if hedonic hunger reduced during a behavioural weight management programme, and if hedonic hunger predicted future BMI. Methods: Participants were 594 community-dwelling, UK-based adults(396 f...
Article
Full-text available
Objectives To examine prospective associations between intakes of sugar-sweetened beverages (SSB), fruit juice, and low-calorie beverages (LCB), and all-cause mortality among Dutch adults participating in the Lifelines Cohort Study. Methods A total of 118,439 participants aged 45 ± 13 years (60% women) were included in a prospective cohort analysi...
Article
Full-text available
Scope To examine the relationship between changes in circulating metabolites during diet-induced weight loss and changes of adiposity. We also investigated changes in these metabolites in relation to body weight and adiposity regain during a weight loss maintenance period. Methods and Results This cohort study was nested within the Satiety Innovat...
Article
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Objectives To investigate the perceptions, attitudes, behaviours and potential barriers to effective obesity care in the UK using data collected from people with obesity (PwO) and healthcare professionals (HCPs) in the Awareness, Care, and Treatment In Obesity maNagement–International Observation (ACTION-IO) study. Design UK’s PwO (body mass index...
Article
Full-text available
The interplay between fat mass and lean mass within human metabolism is not completely understood. We aimed to identify specific circulating metabolomic profiles associated with these body composition compartments. Cross-sectional analyses were conducted over 236 adults with overweight/obesity from the Satiety Innovation (SATIN) study. Body composi...
Article
Background: Research examining the relationship between postpartum anxiety and maternal bonding is limited by the use of general measures of anxiety which may predict perinatal outcomes less effectively than childbearing specific tools. Objectives: This study aimed to investigate the predictive validity of the Postpartum Specific Anxiety Scale [PSA...
Article
There is considerable interest in Cognitive Bias Modification (CBM) as a potential treatment for overweight/obesity. Inhibitory Control Training (ICT: also known as motor response training) and Evaluative Conditioning (EC) are two popular paradigms which rely on associatively learned responses (unhealthy food - > inhibition, or unhealthy food- > ne...
Article
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Objective This study examined the effects of a short-term reduction in physical activity, and subsequent resumption, on metabolic profiles, body composition and cardiovascular (endothelial) function.DesignTwenty-eight habitually active (≥10,000 steps/day) participants (18 female, 10 male; age 32 ± 11 years; BMI 24.3 ± 2.5 kg/m2) were assessed at ba...
Article
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There is substantial evidence documenting the effects of behavioural interventions on weight loss (WL). However, behavioural approaches to initial WL are followed by some degree of longer-term weight regain, and large trials focusing on evidence-based approaches to weight loss maintenance (WLM) have generally only demonstrated small beneficial effe...
Article
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Food systems are significant sources of global greenhouse gas emissions (GHGE). Since emission intensity varies greatly between different foods, changing food choices towards those with lower GHGE could make an important contribution to mitigating climate change. Public engagement events offer an opportunity to communicate these multifaceted issues...
Article
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Background: Global crises inevitably increase levels of anxiety in postpartum populations. Effective and efficient measurement is therefore essential. This study aimed to create a 12-item research short form of the 51-item Postpartum Specific Anxiety Scale [PSAS] and validate it for use in rapid response research at a time of global crises [PSAS-RS...
Article
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Scope: To identify a metabolomic profile related to postprandial satiety sensations involved in appetite control would help for a better understanding of the regulation of food intake. Methods and Results: A cross-sectional analysis of plasma metabolites was conducted over 151 overweight/obese adults from the "Satiety Innovation"-SATIN study, a ran...
Article
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Background People with obesity (PwO) often struggle to achieve and maintain weight loss. This can perpetuate and/or be influenced by feelings of low motivation. This analysis from ACTION-IO data identified factors associated with PwO motivation to lose weight. Methods PwO completed an online survey in 11 countries. Exploratory multinomial logistic...
Article
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The Milan Charter on Urban Obesity highlights the challenges of urban environments as a battleground for human health, as cities are often organized to subvert public health goals, and promote rather than prevent the development of obesity and consequent non-communicable diseases. The Charter articulates ten principles which detail actions and stra...
Article
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Overconsumption of free sugars, particularly from sugar-sweetened beverages (SSB), has potential negative health impacts. Implementation of a range of public health strategies is needed to reduce intakes of free sugars, including reducing portion sizes, promoting healthier dietary choices and reformulating foods and beverages. Although low-calorie...
Article
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Background: The care of people with obesity is often suboptimal due to both physician and patient perceptions about obesity itself and clinical barriers. Using data from the ACTION-IO study, we aimed to identify factors that might improve the quality of obesity care through adoption of the 3D approach (Discussion, Diagnosis and Direction [follow-u...
Article
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Weight regain following weight loss is frequent problem that people with obesity face. This weight recidivism is often attributed to the lack of compliance with appropriate food habits and exercise. On the contrary, it is known that body weight and fat mass are regulated by numerous physiological mechanisms, far beyond voluntary food intake and phy...
Article
Objective To formally test a hierarchy of effects model linking exposure to television (TV) advertising for unhealthy foods with child body weight through purchase requests, purchases, and consumption. Design A nationally representative cross-sectional online study in the United Kingdom. Participants A total of 2,260 parent-child dyads (children...
Chapter
Hunger is a conscious sensation and an important motivational drive. However, the term “hunger” generally covers a number of facets that promote and sustain our eating behavior. These are both the internal and the external factors that drive individuals to consume. This article will clarify the meaning of hunger and describe common procedures for m...
Article
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Objective: This study’s principal aim was to describe the lived reality for people with cardiovascular disease (CVD) and other chronic health conditions, who live in economically deprived neighbourhoods in a city in North West England. Methodology: This is a qualitative, exploratory study based on in-depth, semi-structured interviews with participa...
Article
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Background Guidelines recommend that clinicians identify individuals at high cardiometabolic risk and support weight loss in those with overweight or obesity. However, we lack individual level data quantifying the benefits of weight change for individuals to guide consultations in primary care. Aim To examine how weight change affects cardiometabo...
Article
Full-text available
Background Short-term laboratory studies suggest that eating attentively can reduce food intake. However, in a recent randomized controlled trial we found no evidence that using an attentive eating smartphone app outside of the laboratory had an effect on energy intake or weight loss over 8 weeks. Objective This research examined trial participant...
Article
Full-text available
Background: There is considerable heterogeneity in long-term weight loss among people referred to obesity treatment programmes. It is unclear whether attendance at face-to-face sessions in the early weeks of the programme is an independent predictor of long-term success. Objective: To investigate whether frequency of attendance at a community we...
Article
Energy-dense food advertising affects children’s eating behaviour. However, the impact of high sugar food advertising specifically on the intake of sweet foods is underexplored. This study sought to determine whether children would increase their intake of sugar, and total energy, following high sugar food advertising (relative to toy advertising)...
Article
Full-text available
The World Health Organization declared COVID-19, the infectious disease caused by the coronavirus SARS-CoV-2, a pandemic on March 12, 2020. COVID-19 is causing massive health problems and economic suffering around the world. The European Association for the Study of Obesity (EASO) promptly recognised the impact that the outbreak could have on peopl...
Article
Full-text available
Aims: We examined the impact of open-group behavioural weight management programmes on diabetes risk among i) those with BMI ≥28 kg/m2 and ii) those with non-diabetic hyperglycaemia (NDH). Methods: This was a secondary analysis of data from the WRAP trial, in which participants (N = 1267; ≥18 years, BMI ≥28 kg/m2 ) were randomised to: brief inte...
Article
Introduction In the broad literature on the effects of ingredients, foods and diets on appetite and energy intake (EI), most trials involve a single acute intervention. It is unclear whether these acute results are generally sustained over longer periods. Researchers and regulators therefore lack an objective basis to judge the appropriate duration...
Article
Full-text available
Background: The composition of diets consumed following weight loss (WL) can have a significant impact on satiety and metabolic health. Objective: This study was designed to test the effects of including a nondigestible carbohydrate to achieve weight maintenance (WM) following a period of WL. Methods: Nineteen volunteers [11 females and 8 male...
Article
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Background Surgery for obesity and metabolic diseases has been evolved in the light of new scientific evidence, long-term outcomes and accumulated experience. EAES has sponsored an update of previous guidelines on bariatric surgery.MethodsA multidisciplinary group of bariatric surgeons, obesity physicians, nutritional experts, psychologists, anesth...
Article
Full-text available
Aims The aim was to investigate the acute and sustained effects of foods previously shown to reduce appetite on appetite and weight loss maintenance. Methods Following an 8-week weight loss phase achieving ≥ 8% weight loss and 7–10 days of weight-stabilization, participants underwent a double-blinded, randomized, parallel 12-week weight loss maint...
Article
Full-text available
Background: Smaller portions may help to reduce energy intake. However, there may be a limit to the magnitude of the portion size reduction that can be made before consumers respond by increasing intake of other food immediately or at later meals. We tested the theoretical prediction that reductions to portion size would result in a significant re...
Article
Full-text available
Background: Consumption of large portions of energy‐dense foods promotes weight gain in children. Breakfast cereal boxes often show portions much larger than the recommended serving size. Objective: This experimental study investigated whether front‐of‐package portion size depictions influence children's self‐served portions and consumption. Method...
Article
Full-text available
Heterogeneity of interindividual and intraindividual responses to interventions is often observed in randomized, controlled trials for obesity. To address the global epidemic of obesity and move toward more personalized treatment regimens, the global research community must come together to identify factors that may drive these heterogeneous respon...
Article
Full-text available
Exposure to influencer marketing of foods and beverages high in fat, sugar, and/or salt (HFSS) increases children’s immediate intake. This study qualitatively explored children’s understanding of, and attitudes towards, this marketing, to elucidate potential mechanisms through which exposure affects behavior. In six focus groups (n = 4) children (1...
Article
Full-text available
Food insecurity affects approximately 8.4 million people in the UK, one of the worst levels in Europe. Food insecurity is associated with poor diet quality and obesity; however, the drivers of this relationship are unclear. This study used a qualitative approach to explore factors that influence food choice and eating behaviour in a food-insecure p...
Article
Full-text available
New dietary-based concepts are needed for treatment and effective prevention of overweight and obesity. The primary objective was to investigate if reduction in appetite is associated with improved weight loss maintenance. This cohort study was nested within the European Commission project Satiety Innovation (SATIN). Participants achieving ≥8% weig...
Article
Full-text available
Background: Consumption of large portions of energy-dense foods promotes weight gain in children. Breakfast cereal boxes often show portions much larger than the recommended serving size. Objective: This experimental study investigated whether front-of-package portion size depictions influence children's self-served portions and consumption. Me...
Preprint
BACKGROUND Short-term laboratory studies suggest that eating attentively can reduce food intake. However, in a recent randomized controlled trial we found no evidence that using an attentive eating smartphone app outside of the laboratory had an effect on energy intake or weight loss over 8 weeks. OBJECTIVE This research examined trial participant...
Article
Full-text available
Different plasma metabolites have been related to insulin resistance (IR). However, there is a lack of metabolite models predicting IR with external validation. The aim of this study is to identify a multi-metabolite model associated to the homeostatic model assessment (HOMA)-IR values. We performed a cross-sectional metabolomics analysis of sample...
Conference Paper
Full-text available
Background The Postpartum Specific Anxiety Scale [PSAS] was originally developed and validated as a research tool with a four-factor structure. Its predictive validity has been corroborated in studies examining both infant feeding and maternal bonding outcomes. Validation is an iterative process and confirmatory factor analyses are necessary to ver...
Article
Reducing food portion size could reduce energy intake. However it is unclear at what point consumers respond to reductions by increasing intake of other foods. We predicted that a change to a served portion size would only result in significant additional eating within the same meal if the resulting portion size was no longer visually perceived as...
Conference Paper
Full-text available
Background Research examining the relationship between postpartum anxiety and maternal bonding is limited by the use of general measures of anxiety which may predict perinatal outcomes less effectively than childbearing specific tools. Recent evidence has demonstrated that the Postpartum Specific Anxiety Scale [PSAS] has more predictive power than...
Conference Paper
Full-text available
Background The Postpartum Specific Anxiety Scale [PSAS] was originally developed and validated as a research tool with a four-factor structure. Its predictive validity has been corroborated in studies examining both infant feeding and maternal bonding outcomes. Validation is an iterative process and confirmatory factor analyses are necessary to ver...