Publications by authors named "Rob M van Dam"

Purpose: The rising incidence of the metabolic syndrome (MetS) is a major public health issue, especially in Asian populations. The pro-inflammatory diet might contribute to the development of the MetS. Previous studies have not investigated the association between the Empirical Dietary Inflammatory Pattern (EDIP) and the incidence of MetS prospectively in a multi-ethnic Asian population.

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Background: Polygenic risk scores (PRSs) improve type 2 diabetes (T2D) prediction beyond clinical risk factors but perform poorly in non-European populations, where T2D burden is often higher, undermining their global clinical utility.

Methods: We conducted the largest global effort to date to harmonize T2D genome-wide association study (GWAS) meta-analyses across five ancestries-European (EUR), African/African American (AFR), Admixed American (AMR), South Asian (SAS), and East Asian (EAS)-including 360,000 T2D cases and 1·8 million controls (41% non-EUR). We constructed ancestry-specific and multi-ancestry PRSs in training datasets including 11,000 T2D cases and 32,000 controls, and validated their performance in independent datasets including 39,000 T2D cases and 126,000 controls of diverse ancestries.

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Background & Aims: Metabolic syndrome is prevalent in Asian populations, but it remains to be established if polyunsaturated fatty acids (PUFA) play a preventive role. We aimed to investigate the association between the longitudinal change in plasma n-3 and n-6 PUFA and MetS incidence and potential mediating role of inflammation on the association between baseline plasma PUFA and MetS incidence.

Methods: Prospective data were collected from 1303 males and females (aged 21-75 years) in a Multi-Ethnic Cohort at baseline and at a median follow-up of 6 years.

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The plant-based dietary indices (PDIs), which include the healthy and unhealthy plant-based dietary indices, have recently been developed by taking into account the quantity of plant versus animal foods and the quality of plant foods. Data on the association between PDI and hepatocellular carcinoma (HCC) risk are sparse. We, therefore, prospectively evaluated the associations for PDI, healthy PDI (hPDI) and unhealthy PDI (uPDI) with HCC risk.

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While rigorous longitudinal study of a widely and enthusiastically consumed dietary substance has it challenges, recent exponential growth in the scientific evaluation of coffee consumption has resulted in a clearer appreciation of the link between this common drink and health outcomes. Coffee has complex effects that can vary between individuals depending on both inherited predispositions as well as consumption habits. Despite the common concern and conventional 'wisdom' that coffee can promote various cardiovascular diseases, the available data suggest that moderate coffee consumption is associated with a reduced risk of hypertension, type 2 diabetes, myocardial infarction, arrhythmias, heart failure, and even overall mortality.

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Background: Gene-environment interactions may enhance our understanding of hypertension. Our previous study highlighted the importance of considering psychosocial factors in gene discovery for blood pressure (BP) but was limited in statistical power and population diversity. To address these challenges, we conducted a multi-population genome-wide association study (GWAS) of BP accounting for gene-depressive symptomatology (DEPR) interactions in a larger and more diverse sample.

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To identify biomarkers and pathways to Type-2 diabetes (T2D), a major global disease, we completed array-based epigenome-wide association in whole blood in 5,709 Asian people. We found 323 Sentinel CpGs (from 314 genetic loci) that predict future T2D. The CpGs reveal coherent, nuclear regulatory disturbances in canonical immune activation pathways, as well as metabolic networks involved in insulin signalling, fatty acid metabolism and lipid transport, which are causally linked to development of T2D.

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Background: Blended mobile health (mHealth) interventions - combining self-guided and human support components - could play a major role in preventing non-communicable diseases (NCDs) and common mental disorders (CMDs). This protocol describes a sequential, multiple assignment, randomised trial aimed at (i) evaluating the effectiveness and cost-effectiveness of LvL UP, an mHealth lifestyle intervention for the prevention of NCDs and CMDs, and (ii) establishing the optimal blended approach in LvL UP that balances effective personalised lifestyle support with scalability.

Methods: LvL UP is a 6-month mHealth holistic intervention targeting physical activity, diet, and emotional regulation.

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Background: Cognitive impairment is a growing concern in Southeast Asian populations, where the burden of cerebrovascular disease (CeVD) is high. Currently, there is no point-based scoring system for identifying cognitive impairment in these populations.

Objective: To develop and validate a simple point-based Cognitive Impairment Scoring System (CISS) for identifying individuals with cognitive impairment no dementia (CIND) and concomitant CeVD in Southeast Asian populations.

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Context: Type 2 diabetes (T2D) is a major global concern, with Asia at its epicenter in recent years. Proteins, products of gene transcription, serve as dynamic biomarkers for pinpointing perturbed pathways in disease development. Previous T2D proteomic association studies primarily focused on European populations.

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Background And Aims: To identify the patterns of coffee drinking timing in the US population and evaluate their associations with all-cause and cause-specific mortality.

Methods: This study included 40 725 adults from the National Health and Nutrition Examination Survey 1999-2018 who had complete information on dietary data and 1463 adults from the Women's and Men's Lifestyle Validation Study who had complete data on 7-day dietary record. Clustering analysis was used to identify patterns of coffee drinking timing.

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Background: It remains unclear what lifestyle behaviors are optimal for controlling postprandial glucose responses under real-world circumstances in persons without diabetes. We aimed to assess associations of diet, physical activity, and sleep with postprandial glucose responses in Asian adults without diabetes under free-living conditions.

Methods: We conducted an observational study collecting intensive longitudinal data using smartphone-based ecological momentary assessments, accelerometers, and continuous glucose monitors over nine free-living days in Singaporean men and women aged 21-69 years without diabetes.

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Objective:

Setting: Food and beverage advertisements within twenty clicks on the top twelve non-food websites and all posts on the Facebook and Instagram pages of fifteen major food companies in Singapore were sampled from 1 January to 30 June 2018.

Design: Advertised foods were classified as being core (healthier), non-core or mixed dishes (e.g.

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Unlabelled: The biomarkers connecting obesity and cardiometabolic diseases are not fully understood. We aimed to 1) evaluate the associations between BMI, waist circumference (WC), and ∼5,000 plasma proteins (SomaScan V4), 2) identify protein signatures of BMI and WC, and 3) evaluate the associations between the protein signatures and cardiometabolic health, including metabolically unhealthy obesity and type 2 diabetes incidence in the Singapore Multi-Ethnic Cohort Phase 1 (MEC1). Among 410 BMI-associated and 385 WC-associated proteins, we identified protein signatures of BMI and WC and validated them in an independent data set across two time points and externally in the Atherosclerosis Risk in Communities (ARIC) study.

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Article Synopsis
  • The study investigates how different diets, specifically the Alternative Healthy Eating Index (AHEI) and DASH diet, influence the risk of developing type 2 diabetes by analyzing plasma proteins in diverse populations.
  • Researchers found 13 proteins linked to AHEI and DASH that relate to inflammation, blood clotting, fat storage, and sugar metabolism, with specific proteins like EGFR and F3 showing strong associations.
  • The results reveal new biological connections between diet and diabetes risk, suggesting that certain protein levels can indicate a person’s likelihood of developing type 2 diabetes across different ethnic groups.
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Article Synopsis
  • This study aimed to assess the reliability of a short food frequency questionnaire designed to evaluate dietary patterns associated with type 2 diabetes risk and to create a Diabetes Dietary Quality Index.
  • Healthy participants completed the questionnaire, and the results indicated good reproducibility, showing consistent correlation in responses.
  • Findings revealed that a higher Diabetes Dietary Quality Index score was linked to improved metabolic health, including lower post-meal glucose and insulin levels, as well as better cholesterol profiles.
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Background: Meat consumption could increase the risk of type 2 diabetes. However, evidence is largely based on studies of European and North American populations, with heterogeneous analysis strategies and a greater focus on red meat than on poultry. We aimed to investigate the associations of unprocessed red meat, processed meat, and poultry consumption with type 2 diabetes using data from worldwide cohorts and harmonised analytical approaches.

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Article Synopsis
  • Integration of mobile health data collection in cohort studies allows for more detailed tracking of health and lifestyle behaviors over time, particularly during the transition from university to the workforce, which can impact young adults' mental well-being.
  • The Health@NUS study aims to investigate the health behaviors and well-being trajectories of young adults during this transition by using mobile health technology to gather data over two years.
  • A total of 776 participants were enrolled, primarily female, Chinese, and undergraduate students, with regular assessments and data collection through devices like Fitbit and smartphone apps.
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With emerging Asian-derived diet quality indices and data-driven dietary patterns available, we aimed to synthesize the various dietary patterns and quantify its association with cardiovascular diseases (CVDs) among Asian populations. We systematically searched PubMed, Embase, Scopus, and Web of Science for observational studies in South, Southeast, and East Asia. Dietary patterns were grouped "high-quality," which included high intakes of three or more of the following food groups: 1) fruits and vegetables, 2) whole grains, 3) healthy protein sources (legumes and nuts, fish and seafood, low-fat dairy, and lean meat and poultry), and 4) liquid plant oils.

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Unhealthy food marketing is contributing to the obesity epidemic, but real-time insights into the mechanisms of this relationship are under-studied. Digital marketing is growing and following food and beverage (F&B) brands on social media is common, but measurement of exposure and impact of such marketing presents novel challenges. Thus, this study aimed to evaluate the feasibility of collecting data on exposure and impact of digital F&B marketing (DFM) using a smartphone-based ecological momentary assessment (EMA) methodology.

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Article Synopsis
  • Type 2 diabetes (T2D) is a complex disease influenced by various genetic factors and molecular mechanisms that vary by cell type and ancestry.
  • In a large study involving over 2.5 million individuals, researchers identified 1,289 significant genetic associations linked to T2D, including 145 new loci not previously reported.
  • The study categorized T2D signals into eight distinct clusters based on their connections to cardiometabolic traits and showed that these genetic profiles are linked to vascular complications, emphasizing the role of obesity-related processes across different ancestry groups.
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Article Synopsis
  • - The study investigates how the DASH diet score influences systolic blood pressure (BP) in relation to genetic factors, analyzing data from over 127,000 participants from different population groups, primarily European.
  • - Researchers identified several genetic loci associated with interactions between an individual's genetics and their response to the DASH diet, particularly focusing on the variant rs117878928 at chromosomal location 15q25.1.
  • - Results suggest significant gene-DASH diet interactions affecting systolic BP, highlighting the need for further research in larger, more diverse populations to confirm these findings.
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Background: Metabolic syndrome (MetS) is a precursor to cardiovascular diseases and type 2 diabetes. Existing MetS prediction models relied heavily on biochemical measures and those based on non-invasive predictors such as lifestyle behaviours were limited. We aim to (1) develop a weighted lifestyle risk index for MetS and (2) externally validate this index using two Asian-based cohorts in Singapore.

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Article Synopsis
  • Good physical and mental health are key for healthy aging, and holistic mobile health (mHealth) interventions that include physical activity, diet, and mental health support are promising for improving overall well-being on a larger scale.
  • This systematic review and meta-analysis focused on studies published between 2011 and 2023, specifically looking at randomized controlled trials and non-randomized studies that utilized mHealth technologies targeting adults.
  • The methodology included searching multiple academic databases and assessing the risk of bias, ultimately synthesizing data to evaluate the effectiveness of these interventions on health behaviors and outcomes.
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