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result(s) for
"Stranges Saverio"
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Precision Medicine and Artificial Intelligence: A Pilot Study on Deep Learning for Hypoglycemic Events Detection based on ECG
by
Stranges, Saverio
,
Porumb, Mihaela
,
Pecchia, Leandro
in
639/166/985
,
639/705/117
,
692/699/2743/2815
2020
Tracking the fluctuations in blood glucose levels is important for healthy subjects and crucial diabetic patients. Tight glucose monitoring reduces the risk of hypoglycemia, which can result in a series of complications, especially in diabetic patients, such as confusion, irritability, seizure and can even be fatal in specific conditions. Hypoglycemia affects the electrophysiology of the heart. However, due to strong inter-subject heterogeneity, previous studies based on a cohort of subjects failed to deploy electrocardiogram (ECG)-based hypoglycemic detection systems reliably. The current study used personalised medicine approach and Artificial Intelligence (AI) to automatically detect nocturnal hypoglycemia using a few heartbeats of raw ECG signal recorded with non-invasive, wearable devices, in healthy individuals, monitored 24 hours for 14 consecutive days. Additionally, we present a visualisation method enabling clinicians to visualise which part of the ECG signal (e.g., T-wave, ST-interval) is significantly associated with the hypoglycemic event in each subject, overcoming the intelligibility problem of deep-learning methods. These results advance the feasibility of a real-time, non-invasive hypoglycemia alarming system using short excerpts of ECG signal.
Journal Article
Ethics of COVID-19-related school closures
by
Silverman, Michael
,
Stranges, Saverio
,
Sibbald, Robert
in
Adults
,
Canada - epidemiology
,
Child
2020
COVID-19 mitigation strategies have led to widespread school closures around the world. Initially, these were undertaken based on data from influenza outbreaks in which children were highly susceptible and important in community-wide transmission. An argument was made that school closures were necessary to prevent harm to vulnerable adults, especially the elderly. Although data are still accumulating, the recently described complication, pediatric multisystem inflammatory syndrome, is extremely rare and children remain remarkably unaffected by COVID-19. We also do not have evidence that children are epidemiologically important in community-wide viral spread. Previous studies have shown long-term educational, social, and medical harms from school exclusion, with very young children and those from marginalized groups such as immigrants and racialized minorities most affected. The policy and ethical implications of ongoing mandatory school closures, in order to protect others, need urgent reassessment in light of the very limited data of public health benefit.
Journal Article
Estimated visceral adiposity is associated with risk of cardiometabolic conditions in a population based study
by
Bocquet, Valery
,
Samouda, Hanen
,
Huiart, Laetitia
in
692/308/174
,
692/699/317
,
Adipose tissue
2021
Visceral adiposity is a major risk factor of cardiometabolic diseases. Visceral adipose tissue (VAT) is usually measured with expensive imaging techniques which present financial and practical challenges to population-based studies. We assessed whether cardiometabolic conditions were associated with VAT by using a new and easily measurable anthropometric index previously published and validated. Data (1529 participants) came from the European Health Examination Survey in Luxembourg (2013–2015). Logistic regressions were used to study associations between VAT and cardiometabolic conditions. We observed an increased risk of all conditions associated with VAT. The total adjusted odds ratio (AOR, [95% CI]) for hypertension, prediabetes/diabetes, hypercholesterolemia, and hypertriglyceridemia for the fourth quartile of VAT compared to the lowest were 10.22 [6.75, 15.47]), (5.90 [4.02, 8.67]), (3.60 [2.47, 5.25]) and (7.67 [5.04, 11.67]. We observed higher odds in women than in men for all outcomes with the exception of hypertension. Future studies should investigate the impact of VAT changes on cardiometabolic health and the use of anthropometrically predicted VAT as an accurate outcome when no biomedical imaging is available.
Journal Article
Socioeconomic status and stroke incidence, prevalence, mortality, and worldwide burden: an ecological analysis from the Global Burden of Disease Study 2017
2019
Background
Socioeconomic status (SES) is associated with stroke incidence and mortality. Distribution of stroke risk factors is changing worldwide; evidence on these trends is crucial to the allocation of resources for prevention strategies to tackle major modifiable risk factors with the highest impact on stroke burden.
Methods
We extracted data from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2017. We analysed trends in global and SES-specific age-standardised stroke incidence, prevalence, mortality, and disability-adjusted life years (DALYs) lost from 1990 to 2017. We also estimated the age-standardised attributable risk of stroke mortality associated with common risk factors in low-, low-middle-, upper-middle-, and high-income countries. Further, we explored the effect of age and sex on associations of risk factors with stroke mortality from 1990 to 2017.
Results
Despite a growth in crude number of stroke events from 1990 to 2017, there has been an 11.3% decrease in age-standardised stroke incidence rate worldwide (150.5, 95% uncertainty interval [UI] 140.3–161.8 per 100,000 in 2017). This has been accompanied by an overall 3.1% increase in age-standardised stroke prevalence rate (1300.6, UI 1229.0–1374.7 per 100,000 in 2017) and a 33.4% decrease in age-standardised stroke mortality rate (80.5, UI 78.9–82.6 per 100,000 in 2017) over the same time period. The rising trends in age-standardised stroke prevalence have been observed only in middle-income countries, despite declining trends in age-standardised stroke incidence and mortality in all income categories since 2005. Further, there has been almost a 34% reduction in stroke death rate (67.8, UI 64.1–71.1 per 100,000 in 2017) attributable to modifiable risk factors, more prominently in wealthier countries.
Conclusions
Almost half of stroke-related deaths are attributable to poor management of modifiable risk factors, and thus potentially preventable. We should appreciate societal barriers in lower-SES groups to design tailored preventive strategies. Despite improvements in general health knowledge, access to healthcare, and preventative strategies, SES is still strongly associated with modifiable risk factors and stroke burden; thus, screening of people from low SES at higher stroke risk is crucial.
Journal Article
Multimorbidity and comorbidity revisited: refining the concepts for international health research
by
Griffith, Lauren E.
,
Nicholson, Kathryn
,
van den Akker, Marjan
in
Aging
,
Chronic illnesses
,
Comorbidity
2019
Additionally, as first noted in a commentary published in 2001 in this journal, there continue to be conceptual and practical issues in determining the appropriate occurrence rates of living with multiple health issues [9]. [...]the objective of this commentary is to highlight the current issues in defining the broad concept of multimorbidity within the context of international research and to re-establish the distinction between the concepts of “multimorbidity” and “comorbidity.” [...]the accumulation is increasingly occurring in younger age groups, indicating a timely opportunity for prevention and a need to focus on patient-relevant outcome measures (PROMs). More appropriate uses of the term comorbidity exist in the literature and are framed as a focus on patients living with a specific chronic condition (such as diabetes, stroke, or dementia) and the implications of these conditions for complex management programs and clinical care delivery [27–29]. Because of the lack of clinical guidelines that actively account and respond to the challenges of multimorbidity in clinical management [15,30,31], the tools that are available to health care professionals often have a comorbidity orientation by assessing the impact of a co-occurring condition (or its management protocol) on another condition. [...]the authors acknowledge the complex interplay between comorbidity, multimorbidity, functional impairments, frailty, aging, patient-centeredness, and complexity.
Journal Article
Geographic Variation of Overweight and Obesity among Women in Nigeria: A Case for Nutritional Transition in Sub-Saharan Africa
by
Kandala, Ngianga-Bakwin
,
Stranges, Saverio
in
Adolescent
,
Adult
,
Africa South of the Sahara - epidemiology
2014
Nutritional research in sub-Saharan Africa has primarily focused on under-nutrition. However, there is evidence of an ongoing nutritional transition in these settings. This study aimed to examine the geographic variation of overweight and obesity prevalence at the state-level among women in Nigeria, while accounting for individual-level risk factors.
The analysis was based on the 2008 Nigerian Demographic and Health Survey (NDHS), including 27,967 women aged 15-49 years. Individual data were collected on socio-demographics, but were aggregated to the country's states. We used a Bayesian geo-additive mixed model to map the geographic distribution of overweight and obesity at the state-level, accounting for individual-level risk factors.
The overall prevalence of combined overweight and obesity (body mass index ≥25) was 20.9%. In multivariate Bayesian geo-additive models, higher education [odds ratio (OR) & 95% Credible Region (CR): 1.68 (1.38, 2.00)], higher wealth index [3.45 (2.98, 4.05)], living in urban settings [1.24 (1.14, 1.36)] and increasing age were all significantly associated with a higher prevalence of overweight/obesity. There was also a striking variation in overweight/obesity prevalence across ethnic groups and state of residence, the highest being in Cross River State, in south-eastern Nigeria [2.32 (1.62, 3.40)], the lowest in Osun State in south-western Nigeria [0.48 (0.36, 0.61)].
This study suggests distinct geographic patterns in the combined prevalence of overweight and obesity among Nigerian women, as well as the role of demographic, socio-economic and environmental factors in the ongoing nutritional transition in these settings.
Journal Article
A syndemic of COVID-19 and methanol poisoning in Iran: Time for Iran to consider alcohol use as a public health challenge?
by
Baral, Stefan
,
Nasiri, Naser
,
Stranges, Saverio
in
Alcohol Drinking - adverse effects
,
alcohol policy
,
Alcohol related crime
2020
Methanol poisoning has been a significant public health challenge for several decades in Iran. Even though alcohol use is highly criminalized, people consume illicit alcohol, which tends to be predominantly homemade and often contains methanol. Consequently, thousands of individual poisonings and hundreds of deaths annually are attributable to methanol poisoning. From February 19, 2020 through April 27, 2020, the 2019 coronavirus disease (COVID-19) epidemic rapidly expanded in Iran, and has been associated with 90,481 confirmed cases and 5710 confirmed deaths. Secondary to misinformation about the potential for alcohol to neutralize SARS-CoV-2, there has also been a significant escalation in methanol-related morbidity and mortality, with over 5000 people poisoned and over 500 confirmed deaths for the same period from February through April 2020. In some provinces, the case-fatality rate of methanol poisoning was higher than that from COVID-19. The high morbidity and mortality associated with methanol poisoning preceding and exacerbated by COVID-19 highlight the potential population level health impacts of the implementation of evidence-based education and harm reduction strategies focused on alcohol use across Iran.
•Mass methanol poisoning outbreaks have become a major public health concern in Iran.•More than 5000 methanol poisonings, with more than 500 confirmed deaths, were reported amid the COVID-19 epidemic in Iran.•Policymakers should consider developing and implementing public health models to address alcohol use problems.
Journal Article
Body mass index, waist circumference, waist-to-hip ratio, and body fat in relation to health care use in the Canadian Longitudinal Study on Aging
2021
Background/objectivesObesity is associated with increased health care use (HCU), but it is unclear whether this is consistent across all measures of adiposity. The objectives were to compare obesity defined by body mass index (BMI), waist circumference (WC), waist-to-hip ratio (WHR), and percent body fat (%BF), and to estimate their associations with HCU.Subjects/methodsBaseline data from 30,092 participants aged 45–85 years from the Canadian Longitudinal Study on Aging were included. Measures of adiposity were recorded by trained staff and obesity was defined as BMI ≥ 30.0 kg/m2 for all participants and WC ≥ 88 cm and ≥102 cm, WHR ≥ 0.85 and ≥0.90, and %BF > 35% and >25% (measured using dual energy x-ray absorptiometry) for females and males, respectively. Self-reported HCU in the past 12 months was collected for any contact with a general practitioner, specialist, emergency department, and hospitalization. Pearson correlation coefficients (r) compared each measure to %BF-defined obesity, the reference standard. Relative risks (RR) and risk differences (RD) adjusted for age, sex, education, income, urban/rural, marital status, smoking status, and alcohol use were calculated, and results were age- and sex-stratified.ResultsObesity prevalence varied by measure: BMI (29%), WC (42%), WHR (62%), and %BF (73%). BMI and WC were highly correlated with %BF (r ≥ 0.70), while WHR demonstrated a weaker relationship with %BF, with differences by sex (r = 0.29 and r = 0.46 in females and males, respectively). There were significantly increased RR and RD for all measures and health care services, for example, WC-defined obesity was associated with an increased risk of hospitalization (RR: 1.40, 95% CI: 1.28–1.54 and RD per 100: 2.6, 95% CI:1.9–3.3). Age-stratified results revealed that older adult groups with obesity demonstrated weak or no associations with HCU.ConclusionsAll measures of adiposity were positively associated with increased HCU although obesity may not be a strong predictor of HCU in older adults.
Journal Article
COVID-19 Pandemic: What Can the West Learn From the East?
by
Shokoohi, Mostafa
,
Osooli, Mehdi
,
Stranges, Saverio
in
Canada
,
Communicable Disease Control - methods
,
Communicable diseases
2020
Differences in public health approaches to control the coronavirus disease 2019 (COVID-19) pandemic could largely explain substantial variations in epidemiological indicators (such as incidence and mortality) between the West and the East. COVID-19 revealed vulnerabilities of most western countries’ healthcare systems in their response to the ongoing public health crisis. Hence, western countries can possibly learn from practices from several East Asian countries regarding infrastructures, epidemiological surveillance and control strategies to mitigate the public health impact of the pandemic. In this paper, we discuss that the lack of rapid and timely
community-centered
approaches, and most importantly weak public health infrastructures, might have resulted in a high number of infected cases and fatalities in many western countries.
Journal Article