Lower lung function is associated with lower cognitive function and an increased risk of dementia. This has not been adequately explained and may partly reflect shared developmental pathways. In UK Biobank participants of European ancestry, we tested the association between lung function measures (forced vital capacity and forced expiratory volume in 1 s to forced vital capacity ratio; = 306 476) and cognitive traits including nine cognitive function test scores ( = 32 321-428 609), all-cause dementia, Alzheimer's disease and vascular dementia (6805, 2859 and 1544 cases, respectively, and ∼421 241 controls).
View Article and Find Full Text PDFBackground: Although red meat consumption has been associated with risk of atherosclerotic coronary artery disease and stroke, no prospective study has examined this with the risk of chronic limb-threatening ischemia (CLTI).
Methods: In a prospective study of 63,257 Chinese in Singapore, who were aged 45-74 years old at recruitment, diet was assessed via a validated semi-quantitative food frequency questionnaire. Incident CLTI cases were ascertained via linkage with nationwide hospital records for lower extremity amputation or angioplasty for peripheral arterial disease.
Introduction: Patients with hypertension and diabetes are more susceptible to cardiovascular diseases (CVD) and mortality. This study aimed to evaluate the individual and combined effects of hypertension and diabetes on cardiovascular events and mortality in a Middle Eastern population-based cohort.
Methods: Fifteen-year follow-up data were collected for 6323 adults aged 35 years and older who were free from CVD at baseline.
Background: Many mothers in high-income countries (HIC) do not breastfeed to the World Health Organisation's recommendation of two years. This is particularly true for low-income women (LIW). They often face additional socio-structural barriers that encourage early discontinuation and are inadequately supported by current healthcare interventions.
View Article and Find Full Text PDFBackground: The association between air quality and risk of SARS-CoV-2 infection is poorly understood. We investigated this association using serological individual-level data adjusting for a wide range of confounders, in a large population-based cohort (COVIDENCE UK).
Methods: We assessed the associations between long-term (2015-19) nitrogen dioxide (NO) and fine particulate matter with an aerodynamic diameter of ≤2.
Objective: Obesity is a known risk factor for diabetes, but the effect of weight changes on the incidence of diabetes is not yet determined. This study aims to evaluate the long-term effects of weight change [based on body mass index (BMI)] on the incidence of diabetes mellitus (DM) in a middle eastern population.
Method: In the Isfahan Cohort Study (ICS) 6504 adults equal or greater than 35 years of age were recruited at 2001 and were followed until 2013.
Background: Long COVID is a well recognised, if heterogeneous, entity. Acute respiratory infections (ARIs) due to other pathogens may cause long-term symptoms, but few studies compare post-acute sequelae between SARS-CoV-2 and other ARIs. We aimed to compare symptom profiles between people with previous SARS-CoV-2 infection, people with previous non-COVID-19 ARIs, and contemporaneous controls, and to identify clusters of long-term symptoms.
View Article and Find Full Text PDFPurpose: The link between metabolic syndrome (MetS) and various stressors has not been thoroughly investigated. We aimed to examine the relationship between MetS and different perceived stressors.
Methods: In this study, we included participants of the Isfahan Cohort study from three counties in central Iran, with data in the 2007 ( = 3178) and 2013 ( = 1693) follow-up stages.
Background: Annualized relapse rate (ARR) is used as an outcome measure in multiple sclerosis (MS) clinical trials. Previous studies demonstrated that ARR has reduced in placebo groups between 1990 and 2012. This study aimed to estimate real-world ARRs from contemporary MS clinics in the UK, in order to improve the feasibility estimations for clinical trials and facilitate MS service planning.
View Article and Find Full Text PDFBackground: We aimed to investigate the association between persistent early repolarization (ER) in healthy individuals and long-term cardiovascular events and mortality rates in a large cohort study.
Methods: Demographic characteristics, medical records, 12-lead electrocardiograms (ECGs), and laboratory data were retrieved and analyzed from the Isfahan Cohort Study. The participants were followed up biannually via telephone interviews and 1 live structured interview in between until 2017.
Background: Cardiovascular diseases (CVD) are the predominant cause of early death worldwide. Identification of people with a high risk of being affected by CVD is consequential in CVD prevention. This study adopts Machine Learning (ML) and statistical techniques to develop classification models for predicting the future occurrence of CVD events in a large sample of Iranians.
View Article and Find Full Text PDFBackground: Longitudinal epidemiological data are scarce examining the relationship between dietary patterns and respiratory outcomes in childhood. We investigated whether three distinct dietary patterns in mid-childhood were associated with lung function and incident asthma in adolescence.
Methods: In the Avon Longitudinal Study of Parents and Children, 'processed', 'traditional', and 'health-conscious' dietary patterns were identified using principal components analysis from food frequency questionnaires at 7 years of age.
Prospective population-based studies investigating associations between reactive symptoms following SARS-CoV-2 vaccination and serologic responses to vaccination are lacking. We therefore conducted a study in 9003 adults from the UK general population receiving SARS-CoV-2 vaccines as part of the national vaccination programme. Titres of combined IgG/IgA/IgM responses to SARS-CoV-2 spike (S) glycoprotein were determined in eluates of dried blood spots collected from all participants before and after vaccination.
View Article and Find Full Text PDFBackground: The imposition of restrictions on social mixing early in the COVID-19 pandemic was followed by a reduction in asthma exacerbations in multiple settings internationally. Temporal trends in social mixing, incident acute respiratory infections (ARI) and asthma exacerbations following relaxation of COVID-19 restrictions have not yet been described.
Methods: We conducted a population-based longitudinal study in 2312 UK adults with asthma between November 2020 and April 2022.
Antibody responses to SARS-CoV-2 vaccines vary for reasons that remain poorly understood. A range of sociodemographic, behavioural, clinical, pharmacologic and nutritional factors could explain these differences. To investigate this hypothesis, we tested for presence of combined IgG, IgA and IgM (IgGAM) anti-Spike antibodies before and after 2 doses of ChAdOx1 nCoV-19 (ChAdOx1, AstraZeneca) or BNT162b2 (Pfizer-BioNTech) in UK adults participating in a population-based longitudinal study who received their first dose of vaccine between December 2020 and July 2021.
View Article and Find Full Text PDFObjective: To determine the effect of population level implementation of a test-and-treat approach to correction of suboptimal vitamin D status (25-hydroxyvitamin D (25(OH)D) <75 nmol/L) on risk of all cause acute respiratory tract infection and covid 19.
Design: Phase 3 open label randomised controlled trial.
Setting: United Kingdom.
Background: Little is known about how demographic, behavioural, and vaccine-related factors affect risk of post-vaccination SARS-CoV-2 infection. We aimed to identify risk factors for SARS-CoV-2 infection after primary and booster vaccinations.
Methods: This prospective, population-based, UK study in adults (≥16 years) vaccinated against SARS-CoV-2 assessed risk of breakthrough SARS-CoV-2 infection up to February, 2022, for participants who completed a primary vaccination course (ChAdOx1 nCoV-19 or BNT162b2) and those who received a booster dose (BNT162b2 or mRNA-1273).
In this population-based cohort of 7538 adults, combined immunoglobulin (Ig) G, IgA, and IgM (IgG/A/M) anti-spike titers measured after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination were predictive of protection against breakthrough SARS-CoV-2 infection. Discrimination was significantly improved by adjustment for factors influencing risk of SARS-CoV-2 exposure, including household overcrowding, public transport use, and visits to indoor public places. Anti-spike IgG/A/M titers showed positive correlation with neutralizing antibody titers (rs = 0.
View Article and Find Full Text PDFStress has been suggested as a contributing factor in the etiology and progression of hypertension in prior investigations. For a more comprehensive understanding of this concept, in this study, we aim to evaluate different domains of perceived stress and their possible contribution to the development of hypertension (HTN). This is a secondary analysis of the Isfahan Cohort Study (ICS).
View Article and Find Full Text PDFPurpose: The association between egg consumption and cardiovascular events remains controversial. This study aims to evaluate this association in cardiovascular events including myocardial infarction (MI), ischemic coronary heart disease (ICHD), stroke, cardiovascular disease (CVD), and CVD mortality in an Iranian population.
Methods: This prospective cohort study included 6504 adults (age ≥ 35 years) with no history of CVD event at baseline.
Objective: Prediction models for cardiovascular disease (CVD) mortality come from high-income countries, comprising laboratory measurements, not suitable for resource-limited countries. This study aims to develop and validate a non-laboratory model to predict CVD mortality in a middle-income setting.
Study Design And Setting: We used data of population aged 40-80 years from three cohort studies: Tehran Lipid and Glucose Study (n = 5160), Isfahan Cohort Study (n = 4350), and Golestan Cohort Study (n = 45,500).