Publications by authors named "Thomas Gn"

Atrial fibrillation (AF) and stroke are prevalent conditions worldwide, and the AF burden is expected to concentrate in low- and middle-income countries like Brazil. The National Institute for Health and Care Excellence-funded Global Health Research Group on Atrial Fibrillation Management (GHRG-AF) had a Brazilian arm that addressed AF epidemiology and care in Brazil. GHRG-AF analyzed data from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil), a long-term cohort of 15,105 middle-aged adults in Brazil, focused on cardiovascular disease and diabetes.

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  • Plaque radiotherapy is a targeted treatment for medium-sized ocular tumors like uveal melanoma, using customized plaques to deliver precise radiation while minimizing damage to surrounding healthy tissue.
  • The choice of radioisotope, such as Ruthenium-106 or Iodine-125, is based on factors like tumor characteristics and desired treatment duration, with high dose rate (HDR) options facilitating quicker treatment.
  • Efficacy of Ruthenium-106 varies significantly, and outcomes can be influenced by tumor size, thickness, and location; however, plaque brachytherapy can offer similar survival rates to more invasive treatments like enucleation for suitable cases.
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Background: Early diagnosis and continuity of care is vital for atrial fibrillation (AF), to reduce stroke ; There is a lack of understanding of when and how AF is being diagnosed and managed the care pathway) in in low- and middle-income countries (LMICs). We aimed to identify the AF care pathway in Northern Province, Sri Lanka and determine how the COVID-19 pandemic impacted the care pathway.

Methods: This descriptive longitudinal study utilised two quantitative questionnaires to evaluate the AF pathway: The first questionnaire (baseline) was used to identify where AF was being diagnosed and the second questionnaire (3 months following baseline) was used to identify where and how often AF follow-up care was being received.

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  • Timely care for diabetes and hypertension in people living with HIV is crucial, but barriers in the existing healthcare model hinder effective management of these conditions.
  • A study involving interviews with patients and healthcare professionals in Dodoma, Tanzania highlighted preferences for integrating non-communicable diseases (NCDs) care within HIV treatment at specialized clinics.
  • Key barriers identified include shortages of medications and diagnostic equipment, while facilitators included health workers' confidence and skills, suggesting that addressing these challenges could improve the integration of care.
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Background: Due to increasing life expectancy, almost half of people with type 2 diabetes are aged 65 years or over worldwide. When metformin alone does not control blood sugar, the choice of which second-line therapy to prescribe next is not clear from currently available evidence. The existence of frailty and comorbidities in older adults further increases the complexity of medical decision-making.

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Poor air quality is the largest environmental health risk in England. In the West Midlands, UK, ∼2.9 million people are affected by air pollution with an average loss in life expectancy of up to 6 months.

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Background: Atrial fibrillation (AF) is the most prevalent cardiac arrhythmia in the world. AF increases the risk of stroke 5-fold, though the risk can be reduced with appropriate treatment. Therefore, early diagnosis is imperative but remains a global challenge.

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  • People living with HIV (PLWH) are at increased risk for diabetes and hypertension, yet services for HIV and non-communicable diseases (NCDs) are often separate, creating challenges in understanding how to provide effective care for these comorbidities.
  • Semi-structured interviews with healthcare professionals and PLWH in Dodoma, Tanzania revealed three main themes: organizational/healthcare system factors, individual factors, and syndemic factors, highlighting both barriers and facilitators to care.
  • Key barriers identified included fragmented services, lack of proper screening protocols, and limited access to diagnostic tools, while facilitators included education on lifestyle changes and healthcare professionals' knowledge of NCDs, which positively
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Background: Atrial fibrillation (AF) is a major risk factor for stroke. To enable improvements to AF diagnosis and follow-up care, understanding current patient pathways and barriers to optimal care are essential. We investigated the patient care pathways and their drivers, and the impact of the COVID-19 pandemic on patient pathways in a middle-income country setting, Brazil.

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To investigate the time-dependent effects of traditional risk factors on functional disability in all-cause mortality post-stroke, we evaluated data from a long-term stroke cohort. Baseline cerebrovascular risk factors (CVRF) and functionality at 1 and 6 months were evaluated in survivors from a prospective stroke cohort using the modified Rankin scale (m-RS), which classifies participants as improvement of disability, unchanged disability (at least moderate), and worsening disability. Cox regression models considering baseline risk factors, medication use, and functionality 6 months after stroke were fitted to identify their time-dependent effects up to 12 years of follow-up.

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Background: Identifying existing care pathways is the first step for understanding how services can be improved to enable early diagnosis and effective follow-up care for non-communicable diseases (NCDs); however, evidence on how care pathways can and should be identified in low- and middle-income countries (LMICs) is lacking.

Objective: To describe generalisability and lessons learned from recruitment and data collection for the quantitative component of a mixed methods study designed to determine the care pathway for atrial fibrillation (AF) in Brazil, China and Sri Lanka.

Methods: Adults (≥18 years) that spoke the local language and with an AF diagnosis were eligible.

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Aims: To determine differences in the management of diabetic kidney disease (DKD) relevant to patient sex, ethnicity and socio-economic group in UK primary care.

Methods: A cross-sectional analysis as of January 1, 2019 was undertaken using the IQVIA Medical Research Data dataset, to determine the proportion of people with DKD managed in accordance with national guidelines, stratified by demographics. Robust Poisson regression models were used to calculate adjusted risk ratios (aRR) adjusting for age, sex, ethnicity and social deprivation.

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Emergency responses to the COVID-19 pandemic led to major changes in travel behaviours and economic activities with arising impacts upon urban air quality. To date, these air quality changes associated with lockdown measures have typically been assessed using limited city-level regulatory monitoring data, however, low-cost air quality sensors provide capabilities to assess changes across multiple locations at higher spatial-temporal resolution, thereby generating insights relevant for future air quality interventions. The aim of this study was to utilise high-spatial resolution air quality information utilising data arising from a validated (using a random forest field calibration) network of 15 low-cost air quality sensors within Oxford, UK to monitor the impacts of multiple COVID-19 public heath restrictions upon particulate matter concentrations (PM, PM) from January 2020 to September 2021.

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Introduction: Despite a decade of policy actions, Ulaanbaatar's residents continue to be exposed to extreme levels of air pollution, a major public health concern, especially for vulnerable populations such as pregnant women and children. In May 2019, the Mongolian government implemented a raw coal ban (RCB), prohibiting distribution and use of raw coal in households and small businesses in Ulaanbaatar. Here, we present the protocol for an interrupted time series (ITS; a strong quasi-experimental study design for public health interventions) that aims to assess the effectiveness of this coal ban policy on environmental (air quality) and health (maternal and child) outcomes.

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Background: Atrial fibrillation (AF) is the most common heart arrhythmia globally and it adversely affects the quality of life (QoL). Available rate and rhythm control strategies equally reduce mortality but may impact QoL differently. A number of systematic reviews have focused on the impact of specific strategies on QoL, though a 2006 review synthesized the evidence on the effect of all strategies on QoL, allowing for a clinically important comparison between the types of strategies.

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Background: Female reproductive factors are gaining prominence as factors that enhance cardiovascular disease (CVD) risk; nonetheless, menstrual cycle characteristics are under-recognized as a factor associated with CVD. Additionally, there is limited data from the UK pertaining to menstrual cycle characteristics and CVD risk.

Methods: A UK retrospective cohort study (1995-2021) using data from a nationwide database (The Health Improvement Network).

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Background: Tuberculosis (TB) remains a leading cause of death worldwide, with 98% of cases occurring in low- and middle-income countries (LMICs). The only vaccine licenced for the prevention of TB has limited protection for adolescents, adults and vulnerable populations. A safe and effective vaccine for all populations at risk is imperative to achieve global elimination of TB.

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Although social isolation has been associated with higher mortality risk, the associations of persistence of social isolation with mortality are unclear. We investigated the prospective associations of intermittent and persistent social isolation with all-cause and cause-specific mortality, considering the social contact types (face-to-face and non-face-to-face). 30,518 participants were recruited in 2003-2008 initially and 18,104 participants with re-assessed social isolation information in 2008-2012 were followed up to Dec 2019 in Guangzhou Biobank Cohort Study (GBCS).

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Introduction: To describe the incidence and prevalence of pelvic inflammatory disease (PID) and to estimate the risk of cardiometabolic outcomes among women with PID compared to women without PID.

Methods: A UK retrospective matched cohort study using data from The Health Improvement Network. To assess cardiometabolic risk, women (aged ≥ 16 years) with PID were compared to matched controls without PID.

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Objective: To assess the independent association of maternal lipid levels with birth weight and cord blood insulin (CBI) level.

Setting: The Born in Guangzhou Cohort Study, Guangzhou, China.

Participants: Women who delivered between January 2015 and June 2016 and with umbilical cord blood retained were eligible for this study.

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Background: Atrial fibrillation (AF) negatively impacts health systems worldwide. We aimed to capture perceptions of and barriers and facilitators for AF care in Brazilian primary care units (PCUs) from the perspective of healthcare professionals (HCPs).

Methods: This mixed-methods, cross-sectional study utilised an exploratory sequential design, beginning with the quantitative data collection (up to 18 closed questions) immediately followed by a semi-structured interview.

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Purpose: We examined the association between whole grain and refined grain intake with all-cause, cancer and cardiovascular disease (CVD) mortality using the data from the Guangzhou Biobank Cohort Study.

Methods: 19,597 participants aged 50+ years were recruited from 2003 to 2006 and followed-up until April 2021. Multivariable Cox regression was used to calculate hazard radios (HRs) and 95% confidence intervals (CIs).

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