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24 result(s) for "Howitt, Christina"
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Assessing cardiovascular disease risk and social determinants of health: A comparative analysis of five risk estimation instruments using data from the Eastern Caribbean Health Outcomes Research Network
Accurate assessment of cardiovascular disease (CVD) risk is crucial for effective prevention and resource allocation. However, few CVD risk estimation tools consider social determinants of health (SDoH), despite their known impact on CVD risk. We aimed to estimate 10-year CVD risk in the Eastern Caribbean Health Outcomes Research Network Cohort Study (ECS) across multiple risk estimation instruments and assess the association between SDoH and CVD risk. Five widely used CVD risk estimation tools (Framingham and WHO laboratory, both laboratory and non-laboratory-based, and ASCVD) were applied using data from ECS participants aged 40-74 without a history of CVD. SDoH variables included educational attainment, occupational status, household food security, and perceived social status. Multivariable logistic regression models were used to compare differences in the association between selected SDoH and high CVD risk according to the five instruments. Among 1,777 adult participants, estimated 10-year CVD risk varied substantially across tools. Framingham non-lab and ASCVD demonstrated strong agreement in categorizing participants as high risk. Framingham non-lab categorized the greatest percentage as high risk, followed by Framingham lab, ASCVD, WHO lab, and WHO non-lab. Fifteen times more people were classified as high risk by Framingham non-lab compared with WHO non-lab (31% vs 2%). Mean estimated 10-year risk in the sample was over 2.5 times higher using Framingham non-lab vs WHO non-lab (17.3% vs 6.6%). We found associations between food insecurity, those with the lowest level compared to the highest level of education, and non-professional occupation and increased estimated CVD risk. Our findings highlight significant discrepancies in CVD risk estimation across tools and underscore the potential impact of incorporating SDoH into risk assessment. Further research is needed to validate and refine existing risk tools, particularly in ethnically diverse populations and resource-constrained settings, and to develop race- and ethnicity-free risk estimation models that consider SDoH.
Peripheral Arterial Disease Prevalence in a Population-Based Sample of People with Diabetes on the Caribbean Island of Barbados
Peripheral arterial disease (PAD) is a risk factor for amputation and systemic atherosclerotic disease. Barbados has a high diabetes prevalence, and 89% of diabetes-related hospital admissions are for foot problems. Foot examination is infrequent in Barbados primary care. The prevalence and potential risk factors for PAD in people with diabetes in Barbados were studied. Multistage probability sampling was used to select a representative population sample of people ≥25 years of age with known diabetes or fasting blood glucose ≥7 mmol/L or HbA1c ≥6.5%. We administered the Edinburgh claudication questionnaire and assessed the ankle brachial pressure index (ABI) and Doppler waveform in both dorsalis pedis and posterior tibial arteries. Participants were classified into categories based on ABI as follows: PAD ≤0.90 in any leg; borderline 0.91 to 0.99 in one leg and the other not ≤0.90 or >0.4; normal 1.00 to 1.40 in both legs; and non-compressible >1.40 in one leg and the other not ≤0.9. Waveforms crossing the zero-flow baseline were categorised as normal. Multivariable logistic regression assessed the associations of potential risk factors with PAD. Of 236 participants (74% response rate, 33% male, median age 58.6 years), 51% had previously diagnosed diabetes. Of nine people with symptoms of definite or atypical claudication, four had PAD and one had non-compressible arteries. ABI prevalence (95% CI) was PAD 18.6% (13.8, 24.6), borderline 21.9% (16.6, 28.4), normal 55.5% (49.4, 61.5) and non-compressible 3.9% (1.6, 9.3). Increasing age and female gender were independently associated with PAD. Over 80% of normal legs (ABI 1.00 to 1.40) had normal posterior tibial and dorsalis pedis waveforms, while only 23% legs with PAD (ABI ≤0.90) had normal waveforms in both arteries (Kappa = 0.43). Asymptomatic PAD is common in people with diabetes and requires ABI screening to detect it. Female gender is associated with PAD.
Sodium and potassium excretion in an adult Caribbean population of African descent with a high burden of cardiovascular disease
Background High sodium diets with inadequate potassium and high sodium-to-potassium ratios are a known determinant of hypertension and cardiovascular disease (CVD). The Caribbean island of Barbados has a high prevalence of hypertension and mortality from CVD. Our objectives were to estimate sodium and potassium excretion, to compare estimated levels with recommended intakes and to identify the main food sources of sodium in Barbadian adults. Methods A sub-sample ( n  = 364; 25–64 years) was randomly selected from the representative population-based Health of the Nation cross-sectional study ( n  = 1234), in 2012–13. A single 24-h urine sample was collected from each participant, following a strictly applied protocol designed to reject incomplete samples, for the measurement of sodium and potassium excretion (in mg), which were used as proxy estimates of dietary intake. In addition, sensitivity analyses based on estimated completeness of urine collection from urine creatinine values were undertaken. Multiple linear regression was used to examine differences in sodium and potassium excretion, and the sodium-to-potassium ratio, by age, sex and educational level. Two 24-h recalls were used to identify the main dietary sources of sodium. All analyses were weighted for the survey design. Results Mean sodium excretion was 2656 (2488–2824) mg/day, with 67% (62–73%) exceeding the World Health Organization (WHO) recommended limit of 2000 mg/d. Mean potassium excretion was 1469 (1395–1542) mg/d; < 0.5% met recommended minimum intake levels. Mean sodium-to-potassium ratio was 2.0 (1.9–2.1); not one participant had a ratio that met WHO recommendations. Higher potassium intake and lower sodium-to-potassium ratio were independently associated with age and tertiary education. Sensitivity analyses based on urine creatinine values did not notably alter these findings. Conclusions In this first nationally representative study with objective assessment of sodium and potassium excretion in a Caribbean population in over 20 years, levels of sodium intake were high, and potassium intake was low. Younger age and lower educational level were associated with the highest sodium-to-potassium ratios. These findings provide baseline values for planning future policy interventions for non-communicable disease prevention.
Differences in income, farm size and nutritional status between female and male farmers in a region of Haiti
IntroductionHaiti is the poorest country in the Americas and has the highest levels of gender inequality. It has high burdens of malnutrition and food insecurity. Our aim in this study was to investigate differences between female and male heads of farms in their farm's size and income and in their nutritional status.MethodsWe conducted a mixed-method study with a quantitative survey with 28 female and 80 male farmers and qualitative semi-structured interviews with seven women and 11 men, in nine rural communities, Plateau de Rochelois, Nippes, Haïti.ResultsWe found that significant inequalities existed between female and male heads of farms in this region of Haiti. Farm income was associated with farm size, with female farmers having on average smaller farms, and markedly lower farm incomes compared to male farmers, even after adjusting for the fact that their farms were smaller. Male farmers also had more access to seeds, financing and transportation to market. In addition, female farmers had markedly higher levels of overweight and obesity. In both male and female heads of farms around 1 in 20 were underweight.DiscussionThese findings complement those from other settings, showing that female farmers in low- and middle- income countries typically face severe challenges in accessing resources such as land, credit, and inputs, which can limit their productivity and income-generating potential. Gender sensitive interventions to promote farmer health, well-being and productivity are required.
Interventions designed to promote the consumption of locally produced foods: a scoping review
IntroductionFood system transformation is required for planetary health. Localizing food systems and applying agroecological principles to food production and supply have been suggested to support a resilient and sustainable food system. This scoping review aimed to map the implementation of interventions designed to promote the consumption of locally produced food, their application of agroecological principles and the outcomes evaluated, across Global North and Global South countries.MethodsSearches were conducted systematically in 15 databases. Screening was conducted against criteria to identify eligible studies and data extracted in REDCap and EPPI Reviewer. Data were narratively synthesized, and results displayed as tables, figures and an interactive evidence gap map.ResultsWe found 147 eligible studies describing interventions to promote the consumption of locally produced food. Only two studies reported the impact of intervention on local versus non-local food procurement and we identified a lack of a standard framework for assessing the impact of changing food source practice. Most studies reported dietary outcomes, mainly fruit and vegetable intake, and less used metrics for dietary diversity, particularly in the Global North. A small proportion (5%) reported ecosystem related outcomes. All home growing interventions were conducted in the Global South and most school-based growing interventions were conducted in the Global North. Agroecological principles were applied to Global North and Global South interventions, but a greater proportion of the Global South studies applied agroecological practices (GS 30%; GN 4%).DiscussionThis map of experimental research on local food interventions identifies key differences in intervention types and agroecological principles and practices applied in Global South and Global North countries, potential learnings between settings, and gaps in the evidence. We call for greater coherence in the development, evaluation and reporting of local food interventions to enable synthesis on their effectiveness and to strengthen evidence on local food approaches aiming to improve human nutrition and planetary health.Systematic review registrationhttps://www.crd.york.ac.uk/PROSPERO/view/CRD42023428104, identifier [CRD42023428104].
Responding to the intersecting challenges of non-communicable diseases, food insecurity, and climate change in small island states: the Global Community Food and Health Project
Small island countries of the Caribbean, South-east Asia, and the Pacific are increasingly dependent on food imports, typically of low nutritional quality. This dependence is associated with a decline in local food production and a high burden of nutrition related non-communicable diseases. This paper outlines the rationale, settings, methodology, and theories of change (ToC) of the Global Community Food and Health Project. The project has partnered with communities and stakeholders in Fiji, Palawan (Philippines), St. Vincent and the Grenadines, and St. Lucia to address the question: how can promoting increased community-based food production (CFP) based on agroecological principles improve household diets, nutrition, and food security, while also reducing the incidence of nutrition-related diseases? A further key question being addressed is: what is the environmental, economic and social sustainability of this approach? Our approach engages local stakeholders in food system mapping and co-creation, with “Living Labs” in which setting-specific interventions and ToC with measurable outcomes are designed in each of the four settings. Stakeholders are from local communities, government, local businesses, and civil society. Systematic evidence reviews were conducted and baseline data on household diet and growing practices were collected with locally adapted quantitative and qualitative tools. Interventions, now being implemented, promote environmentally sustainable, and resilient food production based on agroecological principles, while also providing communities with the knowledge and skills to better use local produce. Interventions also include the processing and marketing of produce. The interventions are being evaluated using mixed methods, including an assessment of participant engagement. Our interdisciplinary project provides approaches to engaging with communities and stakeholders to co-create system-wide and complementary interventions that navigate the challenges of improving both population nutrition and sustainable food production. Key to the future success of this work will be learning from and responding to the evaluation of the current interventions, in particular understanding where there are synergies and trade-offs and their implications for ensuring the continuing engagement of, and ownership by, local communities and stakeholders.
Adaptation of a community-based type-2 diabetes mellitus remission intervention during COVID-19: empowering persons living with diabetes to take control
Background The Barbados Diabetes Remission Study-2 reported that a low-calorie diet for weight loss and diabetes remission implemented within the community and supported by trained community health advocates was both an acceptable implementation strategy and a clinically effective intervention. This study aimed to examine the adaptability of the face-to-face protocol into an online modality. Methods The Iterative Decision-making for Evaluation of Adaptations (IDEA) framework guides researchers in examining the necessity of the adaptation and the preservation of core intervention elements during the adaptation process. Adaptation outcomes were documented using the Framework for Reporting Adaptations and Modifications to Evidence-Based Implementation Strategies (FRAME-IS). Implementation outcome was determined by fidelity to core elements. Intervention effectiveness was determined from the analysis of clinical data. Results We decided that an adaptation was needed as COVID-19 control measures prohibited in-person interactions. The core elements—i.e. 12-week intervention duration, daily 840-kcal allowance, and weekly monitoring of weight and blood glucose—could be preserved during the adaptation process. Adaptations were made to the following: (1) the context in which data were collected—participants self-measured at home instead of following the original implementation strategy which involved being measured by community health advocates (CHA) at a community site; (2) the context in which data were entered—participants posted their measurements to a mobile application site which was accessible by CHAs. As with the original protocol, CHAs then entered the measurements into an online database; (3) the formulation of the low-calorie diet—participants substituted the liquid formulation for a solid meal plan of equivalent caloric content. There was non-inferiority in fidelity to attendance with the online format (97.5% visit rate), as compared to the face-to-face modality (95% visit rate). One participant deviated from the calorie allowances citing difficulty in estimating non-exact portion sizes and financial difficulty in procuring meals. Weight change ranged from − 14.3 to 0.4 kg over the 12-week period, and all group members achieved induction of diabetes remission as determined by a FBG of < 7mmol/l and an A1C of < 6.5%. Conclusion The results suggest that this adapted online protocol—which includes changes to both the implementation strategy and the evidence-based practice—is clinically effective whilst maintaining fidelity to key elements. Utilization of the IDEA and FRAME-IS adaptation frameworks add scientific rigour to the research. Trial registration ClinicalTrials.gov NCT03536377 . Registered on 24 May 2018
A cross-sectional study of physical activity and sedentary behaviours in a Caribbean population: combining objective and questionnaire data to guide future interventions
Background Current understanding of population physical activity (PA) levels and sedentary behaviour in developing countries is limited, and based primarily on self-report. We described PA levels using objective and self-report methods in a developing country population. Methods PA was assessed in a cross-sectional, representative sample of the population of Barbados (25–54 years), using a validated questionnaire (RPAQ) and individually calibrated combined heart rate and movement sensing monitors. The RPAQ collects information on recalled activity in 4 domains: home, work, transport, and leisure. Physical inactivity was defined according to World Health Organization (WHO) guidelines; sedentary lifestyle was defined as being sedentary for 8 h or more daily; PA overestimation was defined as perceiving activity to be sufficient, when classified as ‘inactive’ by objective measurement. Results According to objective estimates, 90.5 % (95 % CI: 83.3,94.7) of women and 58.9 % (48.4,68.7) of men did not accumulate sufficient activity to meet WHO minimum recommendations. Overall, 50.7 % (43.3,58.1) of the population was sedentary for 8 h or more each day, and 60.1 % (52.8,66.9) overestimated their activity levels. The prevalence of inactivity was underestimated by self-report in both genders by 28 percentage points (95 % CI: 18,38), but the accuracy of reporting differed by age group, education level, occupational grade, and overweight/obesity status. Low PA was greater in more socially privileged groups: higher educational level and higher occupational grade were both associated with less objectively measured PA and more sedentary time. Variation in domain-specific self-reported physical activity energy expenditure (PAEE) by educational attainment was observed: higher education level was associated with more leisure activity and less occupational activity. Occupational PA was the main driver of PAEE for women and men according to self-report, contributing 57 % (95 % CI: 52,61). The most popular leisure activities for both genders were walking and gardening. Conclusions The use of both objective and self-report methods to assess PA and sedentary behaviour provides important complementary information to guide public health programmes. Our results emphasize the urgent need to increase PA and reduce sedentary time in this developing country population. Women and those with higher social economic position are particularly at risk from low levels of physical activity.
Trends in Longevity in the Americas: Disparities in Life Expectancy in Women and Men, 1965-2010
We describe trends in life expectancy at birth (LE) and between-country LE disparities since 1965, in Latin America and the Caribbean. LE trends since 1965 are described for three geographical sub-regions: the Caribbean, Central America, and South America. LE disparities are explored using a suite of absolute and relative disparity metrics, with measurement consensus providing confidence to observed differences. LE has increased throughout Latin America and the Caribbean. Compared to the Caribbean, LE has increased by an additional 6.6 years in Central America and 4.1 years in South America. Since 1965, average reductions in between-country LE disparities were 14% (absolute disparity) and 23% (relative disparity) in the Caribbean, 55% and 51% in Central America, 55% and 52% in South America. LE in Latin America and the Caribbean is exceeding 'minimum standard' international targets, and is improving relative to the world region with the highest human longevity. The Caribbean, which had the highest LE and the lowest between-country LE disparities in Latin America and the Caribbean in 1965-70, had the lowest LE and the highest LE disparities by 2005-10. Caribbean Governments have championed a collaborative solution to the growing burden of non-communicable disease, with 15 territories signing on to the Declaration of Port of Spain, signalling regional commitment to a coordinated public-health response. The persistent LE inequity between Caribbean countries suggests that public health interventions should be tailored to individual countries to be most effective. Between- and within-country disparity monitoring for a range of health metrics should be a priority, first to guide country-level policy initiatives, then to contribute to the assessment of policy success.
Anthropometric cut-offs to identify hyperglycemia in an Afro-Caribbean population: a cross-sectional population-based study from Barbados
IntroductionBody mass index (BMI) and waist circumference (WC) cut-offs associated with hyperglycemia may differ by ethnicity. We investigated the optimal BMI and WC cut-offs for identifying hyperglycemia in the predominantly Afro-Caribbean population of Barbados.Research design and methodsA cross-sectional study of 865 individuals aged ≥25 years without known diabetes or cardiovascular disease was conducted. Hyperglycemia was defined as fasting plasma glucose ≥5.6 mmol/L or hemoglobin A1c ≥5.7% (39 mmol/mol). The Youden index was used to identify the optimal cut-offs from the receiver operating characteristic (ROC) curves. Further ROC analysis and multivariable log binomial regression were used to compare standard and data-derived cut-offs.ResultsThe prevalence of hyperglycemia was 58.9% (95% CI 54.7% to 63.0%). In women, optimal BMI and WC cut-offs (27 kg/m2 and 87 cm, respectively) performed similarly to standard cut-offs. In men, sensitivities of the optimal cut-offs of BMI ≥24 kg/m2 (72.0%) and WC ≥86 cm (74.0%) were higher than those for standard BMI and WC obesity cut-offs (30.0% and 25%–46%, respectively), although with lower specificity. Hyperglycemia was 70% higher in men above the data-derived WC cut-off (prevalence ratio 95% CI 1.2 to 2.3).ConclusionsWhile BMI and WC cut-offs in Afro-Caribbean women approximate international standards, our findings, consistent with other studies, suggest lowering cut-offs in men may be warranted to improve detection of hyperglycemia. Our findings do, however, require replication in a new data set.