Publications by authors named "Koon K Teo"

Background And Objective: It is unclear whether variation in covert cerebrovascular disease prevalence is attributable to ethnic differences or to other factors. We aimed to examine the associations of country of residence with covert vascular brain injury (VBI) and cognitive dysfunction among Chinese adults residing in Canada and China.

Methods: This was a multisite cross-sectional study of Chinese adults aged 40-80 years in the Canadian Alliance for Healthy Hearts and Healthy Minds (CAHHM; January 1, 2014, to December 31, 2018) and Prospective Urban Rural Epidemiological-Mind (PURE-MIND; November 1, 2010, to July 31, 2015) cohorts living in Canada and China.

View Article and Find Full Text PDF

Objectives: Long-term exposure to air pollution has been associated with higher risk of cardiovascular mortality. Less is known about the association of air pollution with initial development of cardiovascular disease. Herein, the association between low-level exposure to air pollutants and subclinical carotid atherosclerosis in adults without known clinical cardiovascular disease was investigated.

View Article and Find Full Text PDF

Background: The drivers of cardiovascular disease (CVD) and all-cause mortality may differ around the world. Regional-level prospective data can help guide policies to reduce CVD and all-cause mortality.

Objectives: This study examined the incidence of CVD and mortality in Malaysia and the Philippines and estimated the population-level risks attributable to common risk factors for each outcome.

View Article and Find Full Text PDF
Article Synopsis
  • Maternal smoking adversely affects newborn health, but its impact has not been fully quantified using cord blood DNA methylation (DNAm) scores; this study explores the connection in White European and South Asian populations.
  • Researchers examined CpG sites related to maternal smoking in two White European birth cohorts and developed an epigenetic score that predicts smoking exposure, validated in an independent cohort.
  • The epigenetic score correlated with higher smoking levels during pregnancy and was linked to smaller birth size and lower birth weight in newborns, particularly in the South Asian cohort.
View Article and Find Full Text PDF
Article Synopsis
  • There are currently no drugs available to slow the progression of aortic stenosis, and while plasma lipoprotein(a) levels may predict its onset, their role in disease progression is debated.
  • A study involving 710 patients from Canada and the UK examined the relationship between plasma lipoprotein(a) concentrations and hemodynamic changes in aortic stenosis.
  • Results showed that patients with higher lipoprotein(a) levels experienced significantly faster progression in peak aortic jet velocity and mean transvalvular gradient, suggesting that elevated lipoprotein(a) may contribute to worse outcomes in aortic stenosis patients.
View Article and Find Full Text PDF

Objective: Red and processed meat is considered risk factors of gestational diabetes mellitus (GDM), but the evidence is inconclusive. We aimed to examine the association between red and processed meat intake and odds of GDM among South Asian and White European women living in Canada.

Methods: This is a cross-sectional analysis of pregnant women from two birth cohorts: SouTh Asian biRth cohorT (START; n = 976) and Family Atherosclerosis Monitoring In earLY life (FAMILY; n = 581).

View Article and Find Full Text PDF

Background: Visit-to-visit blood pressure (BP) variability associates with an increased risk of cardiovascular events. We investigated the role of seasonal BP modifications on the magnitude of BP variability and its impact on cardiovascular risk.

Methods: In 25 390 patients included in the ONTARGET and TRANSCEND trials, the on-treatment systolic (S) BP values obtained by five visits during the first two years of the trials were grouped according to the month in which they were obtained.

View Article and Find Full Text PDF

There are limited data on individual risk factors for SARS-CoV-2 infection (including unrecognized infection). In this seroepidemiologic substudy of an ongoing prospective cohort study of community-dwelling adults, participants were thoroughly characterized pre-pandemic. The SARS-CoV-2 infection was ascertained by serology.

View Article and Find Full Text PDF

Aims: The triglyceride-glucose index (TyG) has been proposed as an alternative to insulin resistance and as a predictor of cardiovascular outcomes. Little is known on its role in chronic stable cardiovascular disease and its predictive power at controlled low density lipoprotein (LDL) levels.

Methods And Results: Our study population consisted of 29 960 participants in the ONTARGET and TRANSCEND trials that enrolled patients with known atherosclerotic disease.

View Article and Find Full Text PDF
Article Synopsis
  • The study explores the relationship between gut microbiome and host metabolism as key factors influencing obesity risk in infants, particularly among South Asian children living in Canada.
  • Researchers analyzed gut microbiome and serum metabolite profiles of 50 infants to identify differences between those who are overweight/obese and those of normal weight.
  • Findings revealed specific metabolites and bacterial genera associated with childhood overweight/obesity, suggesting that these factors could impact satiety, energy metabolism, and gut health, and provide insights for potential interventions.
View Article and Find Full Text PDF

Background: Childhood obesity is a global health concern and can lead to lifetime cardiometabolic disease. New advances in metabolomics can provide biochemical insights into the early development of obesity, so we aimed to characterize serum metabolites associated with overweight and adiposity in early childhood and to stratify associations by sex.

Methods: Nontargeted metabolite profiling was conducted in the Canadian CHILD birth cohort (discovery cohort) at age 5 years (n = 900) by multisegment injection-capillary electrophoresis-mass spectrometry.

View Article and Find Full Text PDF

Aims: Elevated lipoprotein(a) [Lp(a)] levels are associated with the risk of coronary artery disease (CAD) and calcific aortic valve stenosis (CAVS). Observational studies revealed that Lp(a) and C-reactive protein (CRP) levels, a biomarker of systemic inflammation, may jointly predict CAD risk. Whether Lp(a) and CRP levels also jointly predict CAVS incidence and progression is unknown.

View Article and Find Full Text PDF
Article Synopsis
  • Tobacco smoking is a major preventable cause of death worldwide, and urinary thiocyanate serves as a biomarker for cyanide exposure from tobacco, yet its effectiveness across various smoker populations has been under-researched.
  • In a study involving 1,000 participants from 14 countries, urinary thiocyanate levels were measured in light and heavy smokers compared to never-smokers, revealing a strong correlation with cigarette consumption and showing better differentiation between smokers and non-smokers than urinary cotinine.
  • Results indicated that higher thiocyanate levels in current smokers from high-income countries suggest different smoking habits and more toxic exposure, while levels in never-smokers were influenced by dietary habits that could mask
View Article and Find Full Text PDF

Arterial hypertension is a leading cause of death globally. Due to ageing, the rising incidence of obesity, and socioeconomic and environmental changes, its incidence increases worldwide. Hypertension commonly coexists with Type 2 diabetes, obesity, dyslipidaemia, sedentary lifestyle, and smoking leading to risk amplification.

View Article and Find Full Text PDF
Article Synopsis
  • - The study analyzed data from 703,901 individuals and identified 99 genetic loci related to physical activity levels and sedentary behavior, particularly focusing on leisure time activities and screen use.
  • - Certain genes linked to sedentary behavior show heightened expression in skeletal muscle when influenced by resistance training, highlighting a connection between genetics and exercise.
  • - The findings suggest that lower screen time and increased physical activity can positively impact health, but these effects may be influenced by factors like body mass index (BMI).
View Article and Find Full Text PDF

Iodine is a trace micronutrient that is critical for normal thyroid function and human health. Inadequate dietary intake is associated with cognitive impairment, infertility, growth retardation and iodine deficiency disorders in affected populations. Herein, we examined the prevalence of iodine deficiency in adults (median age of 61 years) based on the analysis of 24 h urine samples collected from 800 participants in four clinical sites across Canada in the Prospective Urban and Rural Epidemiological (PURE) study.

View Article and Find Full Text PDF

The extent to which variation in food-related metabolites are attributable to non-dietary factors remains unclear, which may explain inconsistent food-metabolite associations observed in population studies. This study examined the association between non-dietary factors and the serum concentrations of food-related biomarkers and quantified the amount of variability in metabolite concentrations explained by non-dietary factors. Pregnant women ( = 600) from two Canadian birth cohorts completed a validated semi-quantitative food frequency questionnaire, and serum metabolites were measured by multisegment injection-capillary electrophoresis-mass spectrometry.

View Article and Find Full Text PDF

Background: COVID-19 has caused profound socio-economic changes worldwide. However, internationally comparative data regarding the financial impact on individuals is sparse. Therefore, we conducted a survey of the financial impact of the pandemic on individuals, using an international cohort that has been well-characterized prior to the pandemic.

View Article and Find Full Text PDF

Importance: Excess adipose tissue increases other cardiovascular risk factors, which may be associated with vascular brain injury and cognitive impairment. However, the extent to which the amount and distribution of adipose tissue may be associated with lower cognitive scores, independent of its association with cardiovascular risk factors, is not well characterized.

Objective: To investigate the association of adiposity on vascular brain injury and cognitive scores.

View Article and Find Full Text PDF

Background: Separate studies suggest that the risks from smoking might vary between high-income (HICs), middle-income (MICs), and low-income (LICs) countries, but this has not yet been systematically examined within a single study using standardised approaches. We examined the variations in risks from smoking across different country income groups and some of their potential reasons.

Methods: We analysed data from 134 909 participants from 21 countries followed up for a median of 11·3 years in the Prospective Urban Rural Epidemiology (PURE) cohort study; 9711 participants with myocardial infarction and 11 362 controls from 52 countries in the INTERHEART case-control study; and 11 580 participants with stroke and 11 331 controls from 32 countries in the INTERSTROKE case-control study.

View Article and Find Full Text PDF

Background: Guidelines recommend physical activity to reduce cardiovascular (CV) events. The association between physical activity and progression of chronic kidney disease (CKD) with and without diabetes is unknown. We assessed the association of self-reported physical activity with renal and CV outcomes in high-risk patients aged ≥ 55 years over a median follow-up of 56 months in post-hoc analysis of a previously randomized trial program.

View Article and Find Full Text PDF

Background: Despite the growing utility of cardiovascular magnetic resonance (CMR) for cardiac morphology and function, sex and age-specific normal reference values derived from large, multi-ethnic data sets are lacking. Furthermore, most available studies use a simplified tracing methodology. Using a large cohort of participants without history of cardiovascular disease (CVD) or risk factors from the Canadian Alliance for Healthy Heart and Minds, we sought to establish a robust set of reference values for ventricular and atrial parameters using an anatomically correct contouring method, and to determine the influence of age and sex on ventricular parameters.

View Article and Find Full Text PDF

Background: Final adult height is a useful proxy measure of childhood nutrition and disease burden. Tall stature has been previously associated with decreased risk of all-cause mortality, decreased risk of major cardiovascular events and an increased risk of cancer. However, these associations have primarily been derived from people of European and East Asian backgrounds, and there are sparse data from other regions of the world.

View Article and Find Full Text PDF

Background: Sparse data exists on the utility of individual serum non-esterified fatty acids (NEFAs) as clinical and dietary biomarkers and how reporting methods could affect these associations. We investigated the associations of 19 serum NEFAs expressed as µM or mol%, with self-reported dietary intake data, and cardiometabolic health indicators in pregnant women.

Methods: In this cross-sectional study, 273 pregnant women in their second trimester each completed a semi-quantitative food-frequency questionnaire and provided fasting serum samples.

View Article and Find Full Text PDF