Determinants of suboptimal blood pressure control in a multi-ethnic population: The Healthy Life in an Urban Setting (HELIUS) study

Among ethnic minority groups in Europe, blood pressure (BP) control is often suboptimal. We aimed to identify determinants of suboptimal BP control in a multi‐ethnic population. We analyzed cross‐sectional data of the Healthy Life in an Urban Setting (HELIUS) study, including 3571 participants aged 18‐70 with prescribed antihypertensive medication, of various ethnic backgrounds (500 Dutch, 1052 African Surinamese, 656 South‐Asian Surinamese, 637 Ghanaian, 433 Turkish, and 293 Moroccan) living in Amsterdam, the Netherlands. 53.3% of the population had suboptimal BP control, defined as BP ≥140/90 mmHg despite prescribed antihypertensives. Using multivariate logistic regression analysis, female sex (OR 0.50, 95%CI 0.43‐0.59), being married (0.83, 0.72‐0.96), smoking (0.78, 0.65‐0.94), alcohol intake (0.80, 0.66‐0.96), obesity (1.67, 1.35‐2.06), cardiovascular disease (CVD) history (0.56, 0.46‐0.68), non‐adherence to antihypertensives (1.26, 1.00‐1.58), and family history of hypertension (1.19, 1.02‐1.38) were identified to be independently associated with suboptimal BP control in the total population. In the ethnic‐stratified analysis, factors associated with better BP control were female sex (all ethnic groups), smoking (Turks), and CVD history (Dutch, South‐Asian Surinamese, and African Surinamese), whereas factors associated with suboptimal BP control were older age (Turks), obesity (Dutch, African Surinamese, Ghanaian, and Turks), and non‐adherence to antihypertensives (Dutch). In conclusion, our analysis identifies several key determinants that are independently associated with suboptimal BP control in a multi‐ethnic population, with some important variations between ethnic groups. Targeting these determinants may help to improve BP control.

Association between Practising Religion and Cardiovascular Disease Risk among Ghanaian Non-Migrants and Migrants in Europe: The RODAM Study

(1) Background: Sub-Saharan African migrants residing in high-income countries are more affected by cardiovascular diseases (CVDs) and associated risk factors than host populations for unclear reasons. The aim was to explore the associations of religion and religious affiliations with CVD risk among Ghanaian non-migrants and migrants in Europe. (2) Methods: The 10-year CVD risk was estimated using pooled cohort equations for 3004 participants from the cross-sectional Research on Obesity and Diabetes among African Migrants (RODAM) study. Logistic regression analyses were conducted to assess associations between religion and elevated CVD risk (score ≥ 7.5) with adjustment for covariates. (3) Results: Religious men in Europe had a lower 10-year CVD risk compared with non-religious men (adjusted OR 0.51; 95% confidence interval 0.30–0.85), specifically men affiliated with Seventh-Day Adventism (0.24; 0.11–0.53) followed by other affiliations (0.32; 0.11–0.94) and Roman Catholicism (0.42; 0.21–0.86). The opposite was found in Ghana, with religious women having higher odds for elevated 10-year CVD risk (1.53; 1.02–2.30) compared with their non-religious counterparts, specifically women affiliated with Reformed Christianity (1.73; 1.03–2.90) and other denominations (2.81; 1.20–6.54). Associations were not significant for men in Ghana and women in Europe. Adjustments for social support, stress, and health behaviors did not meaningfully alter the associations. (4) Conclusions: Christian religious Ghanaian men living in Europe seem to have lower CVD risk compared with their non-religious counterparts, while Christian religious women in Ghana appear to have increased CVD risk. Further unravelling the contributing factors and the differences between sex and environmental settings is needed.

Anthropometric indices and their cut-off points in relation to type 2 diabetes among Ghanaian migrants and non-migrants: The RODAM study

AIMS

To compare body mass index (BMI), waist circumference (WC) and waist-to-hip ratio (WHR) as determinants of type 2 diabetes (T2DM) and determine optimal cut-offs in a sub-Saharan African population.

METHODS

Data from the RODAM study including Ghanaians aged 25-70 living in rural Ghana, urban Ghana and Europe were used. Logistic regression was used to assess associations between BMI, WC, WHR and T2DM status, by sex and site. Area under the curve (AUC) were constructed to discriminate between indices and establish performance and cut-off values.

RESULTS

WHR had the strongest association with T2DM in men and women across sites, except for rural men. The highest adjusted odds ratio (aOR) and AUC were in rural women for WHR (aOR = 2.09, 95%CI = 1.47-2.99; AUC = 0.71). Among migrants, WHR had higher AUCs compared with BMI (p < 0.01) and WC (p < 0.05). Cut-offs for BMI and WC in men were lower compared with the WHO reference across sites (WC: 85.4-93.7 vs 102 cm, BMI: 23.1-28.2 vs 30.0 kg/m²).

CONCLUSIONS

WHR outperformed BMI and WC as anthropometric indices in relation to T2DM among Ghanaian migrants. The lower BMI and WC cut-offs for T2DM than WHO established standards, highlights the need for African specific cut-offs to avoid missing high risk populations.

Migration, ethnicity, racism and the COVID-19 pandemic: A conference marking the launch of a new Global Society

The inaugural conference of the Global Society on Migration, Ethnicity, Race and Health COVID-19 examined the impact of the COVID-19 pandemic on migrants and ethnic minorities and the role of racism. Migrants everywhere have faced tightening immigration restrictions, more obstacles to healthcare, increased racism and worsening poverty. Higher COVID-19 mortality rates have been otbserved in ethnic/racial minorities in the United Kingdom and the United States. Structural racism has been implicated, operating, for example, through more crowded living conditions and higher-risk occupations. In Brazil, good data are lacking but a seroprevalence survey suggested higher rates of infection among ethnic minorities and slum dwellers. Considerable disruption of services for migrants at the border with Venezuela have occurred. National policy responses to protect vulnerable groups have been lacking. In Australia, with strict COVID-19 control metrtrun 0asures and inclusive policies, there have been few cases and deaths reported in Indigenous communities so far. In most countries, the lack of COVID-19 data by ethnic/racial group or migrant status should be addressed. Otherwise, racism and consequent inequalities will go undetected.

Hypertension awareness, treatment and control among ethnic minority populations in Europe: a systematic review and meta-analysis

OBJECTIVE

Ethnic minority populations (EMPs) are disproportionally affected by hypertension-mediated complications compared with European host populations (EHPs), which might be due to disparities in hypertension awareness, treatment and control. We conducted a systematic review and meta-analysis to compare awareness, treatment and control rates among EMPs with EHPs.

METHODS

MEDLINE, EMBASE and Web of Science were searched from inception to 29 January 2020. Critical appraisal was performed according to methods of Hoy et al. Pooled odds ratios with corresponding 95% confidence intervals were calculated for these rates, stratified by ethnic group, using either random or fixed effect meta-analysis based on I2-statistics. Study was registered in PROSPRO (CRD42020107897).

RESULTS

A total of 3532 records were screened of which 16 were included in the analysis with data on 26 800 EMP and 57 000 EHP individuals. Compared with EHPs, African origin populations were more likely to be aware (odds ratio 1.26, 95% confidence interval 1.02-1.56) and treated (1.49, 1.18-1.88) for hypertension, but were less likely to have their blood pressure controlled (0.56, 0.40-0.78), whereas South Asian populations were more likely to be aware (1.15, 1.02-1.30), but had similar treatment and control rates. In Moroccan populations, hypertension awareness (0.79, 0.62-1.00) and treatment levels (0.77, 0.60-0.97) were lower compared with EHPs, while in Turkish populations awareness was lower (0.81, 0.65-1.00).

CONCLUSION

Levels of hypertension awareness, treatment and control differ between EMPs and EHPs. Effort should be made to improve these suboptimal rates in EMPs, aiming to reduce ethnic inequalities in hypertension-mediated complications.

Access to oral health care for undocumented migrants: Perspectives of actors involved in a voluntary dental network in the Netherlands

OBJECTIVE

Undocumented migrants in Europe face multiple barriers in access to oral health care. This study aimed to explore the accessibility of a voluntary dental network providing dental treatments to undocumented migrants in the Netherlands, from the perspectives of patients, dentists and staff members of nongovernmental organizations involved.

METHODS

This qualitative study used semi-structured interviews (n = 21) with undocumented migrants (n = 12), dentists (n = 7) and staff members of nongovernmental organizations (n = 2) during the implementation of a voluntary dental network. Interviews were analysed using a framework analysis method.

RESULTS

As a temporary answer to problems in access to oral health for undocumented migrants, the voluntary dental network targeted initial barriers to dental care. Main challenges within the network were conflicting expectations and perceived treatment outcomes by patients, dentist and NGO staff members, limited financial resources, logistic and communication barriers and an increasing administrative burden. Furthermore, feelings of compassion for and trust of the patient affected the ethics of the professional relationship and influenced treatment decisions of dentists.

CONCLUSION

Through the implementation of a voluntary dental network, treatments could be provided to undocumented migrants as a temporary solution. However, the voluntary nature of dental care in the network resulted in a fragmented provision of oral health care among undocumented migrants. To reduce inequalities in oral health on the long term, systemic barriers in access to oral health care need to be addressed.

Height and body-mass index trajectories of school-aged children and adolescents from 1985 to 2019 in 200 countries and territories: a pooled analysis of 2181 population-based studies with 65 million participants

BACKGROUND

Comparable global data on health and nutrition of school-aged children and adolescents are scarce. We aimed to estimate age trajectories and time trends in mean height and mean body-mass index (BMI), which measures weight gain beyond what is expected from height gain, for school-aged children and adolescents.

METHODS

For this pooled analysis, we used a database of cardiometabolic risk factors collated by the Non-Communicable Disease Risk Factor Collaboration. We applied a Bayesian hierarchical model to estimate trends from 1985 to 2019 in mean height and mean BMI in 1-year age groups for ages 5-19 years. The model allowed for non-linear changes over time in mean height and mean BMI and for non-linear changes with age of children and adolescents, including periods of rapid growth during adolescence.

FINDINGS

We pooled data from 2181 population-based studies, with measurements of height and weight in 65 million participants in 200 countries and territories. In 2019, we estimated a difference of 20 cm or higher in mean height of 19-year-old adolescents between countries with the tallest populations (the Netherlands, Montenegro, Estonia, and Bosnia and Herzegovina for boys; and the Netherlands, Montenegro, Denmark, and Iceland for girls) and those with the shortest populations (Timor-Leste, Laos, Solomon Islands, and Papua New Guinea for boys; and Guatemala, Bangladesh, Nepal, and Timor-Leste for girls). In the same year, the difference between the highest mean BMI (in Pacific island countries, Kuwait, Bahrain, The Bahamas, Chile, the USA, and New Zealand for both boys and girls and in South Africa for girls) and lowest mean BMI (in India, Bangladesh, Timor-Leste, Ethiopia, and Chad for boys and girls; and in Japan and Romania for girls) was approximately 9-10 kg/m2. In some countries, children aged 5 years started with healthier height or BMI than the global median and, in some cases, as healthy as the best performing countries, but they became progressively less healthy compared with their comparators as they grew older by not growing as tall (eg, boys in Austria and Barbados, and girls in Belgium and Puerto Rico) or gaining too much weight for their height (eg, girls and boys in Kuwait, Bahrain, Fiji, Jamaica, and Mexico; and girls in South Africa and New Zealand). In other countries, growing children overtook the height of their comparators (eg, Latvia, Czech Republic, Morocco, and Iran) or curbed their weight gain (eg, Italy, France, and Croatia) in late childhood and adolescence. When changes in both height and BMI were considered, girls in South Korea, Vietnam, Saudi Arabia, Turkey, and some central Asian countries (eg, Armenia and Azerbaijan), and boys in central and western Europe (eg, Portugal, Denmark, Poland, and Montenegro) had the healthiest changes in anthropometric status over the past 3·5 decades because, compared with children and adolescents in other countries, they had a much larger gain in height than they did in BMI. The unhealthiest changes-gaining too little height, too much weight for their height compared with children in other countries, or both-occurred in many countries in sub-Saharan Africa, New Zealand, and the USA for boys and girls; in Malaysia and some Pacific island nations for boys; and in Mexico for girls.

INTERPRETATION

The height and BMI trajectories over age and time of school-aged children and adolescents are highly variable across countries, which indicates heterogeneous nutritional quality and lifelong health advantages and risks.

FUNDING

Wellcome Trust, AstraZeneca Young Health Programme, EU.

Psychosocial stressors among Ghanaians in rural and urban Ghana and Ghanaian migrants in Europe

Psychosocial stressors have significant health and socio-economic impacts on individuals. We examined the prevalence and correlates of psychosocial stressors among non-migrant and migrant Ghanaians as there is limited research in these populations. The study was cross-sectional and quantitative in design. A majority of the study participants had experienced stress, discrimination and negative life events. Increased age, female sex, strong social support and high sense of mastery were associated with lower odds of experiencing psychosocial stressors in both populations. Interventions should be multi-level in design, focusing on the correlates which significantly influence the experience of psychosocial stressors.

The prevalence of metabolic syndrome among Ghanaian migrants and their homeland counterparts: the Research on Obesity and type 2 Diabetes among African Migrants (RODAM) study

Background

Metabolic syndrome (MetSyn) is an important risk factor for cardiovascular diseases and type 2 diabetes. It is unknown whether the MetSyn prevalence differs within a homogenous population residing in different settings in Africa and Europe. We therefore assessed the prevalence of MetSyn among Ghanaians living in rural- and urban-Ghana and Ghanaian migrants living in Europe.

Methods

We used data from the cross-sectional multi-centre RODAM study that was conducted among Ghanaian adults aged 25–70 years residing in rural- and urban-Ghana and in London, Amsterdam and Berlin (n = 5659). MetSyn was defined according to the 2009 harmonized definition. Geographical locations were compared using age-standardized prevalence rates, and prevalence ratios (PRs), adjusted for age, education, physical activity, and smoking and stratified for sex.

Results

In men, the age-standardized prevalence of MetSyn was 8.3% in rural Ghana and showed a positive gradient through urban Ghana (23.6%, adjusted PR = 1.85, 95% confidence interval 1.17–2.92) to Europe, with the highest prevalence in Amsterdam (31.4%; PR = 4.45, 2.94–6.75). In women, there was a rural-to-urban gradient in age-standardized MetSyn prevalence (rural Ghana 25%, urban Ghana 34.4%, PR = 1.38, 1.13–1.68), but small differences in MetSyn prevalence between urban-Ghanaian and European-Ghanaian women (Amsterdam 38.4%; London 38.2%).

Conclusion

MetSyn is highly prevalent in Ghana as well as in Ghanaian migrants in Europe. To assist prevention efforts, further research is needed to understand the mechanisms driving the geographical differences in MetSyn prevalence between migrant and non-migrant Ghanaians.

Gestational diabetes mellitus among Sub-Saharan African and Surinamese women in the Netherlands

AIM

We assessed the association between ethnicity and the risk of gestational diabetes mellitus (GDM) in the Netherlands.

METHODS

A cohort of 7815 women with known GDM status and ethnicity, including women of Sub-Saharan African ethnicity who are currently not identified as high-risk in guidelines. We compared GDM rates among participants of ethnicity to those of ethnic Dutch participants. We employed multivariable regression to correct for possible confounders, including maternal age, pre-pregnancy body mass index (BMI), and education. GDM prevalence and odds ratios based on ethnicity were the main outcome measures.

RESULTS

The prevalence rates of GDM according to ethnicity were: Dutch 0.6%, South-Asian Surinamese 6.9%, African-Surinamese 3.5%, Antillean 1.0%, Turkish 1.0%, Moroccan 1.4%, Ghanaian 6.8%, Sub-Saharan African 3.5%, other Western 0.5% and other non-Western 2.8%. After adjustment for age, pre-pregnancy BMI, and education duration, compared with the reference Dutch-ethnicity population, adjusted odds ratios (aOR) for GDM were statistically significantly higher in South-Asian Surinamese (aOR 10.9; 95% Confidence Interval (CI), 4.7-25.0), African-Surinamese (4.3; 2.0-9.2), Ghanaian (6.5; 3.0-14.5), Sub-Saharan African (5.7; 2.0-16.0), and other non-Western women (4.5; 2.2-9.0). GDM was not significantly increased among Antillean (1.4; 0.2-10.3), Turkish (1.4; 0.4-4.2), Moroccan (1.8; 0.8-4.0), and other Western women (0.8; 0.3-2.2).

CONCLUSIONS

This study shows for the first time in the Netherlands that women of Ghanaian or other Sub-Saharan African ethnicity have an increased risk of developing GDM than the Dutch. This calls for adaptation of the Dutch guidelines of screening high-risk groups for GDM and more awareness amongst obstetric caregivers.

The Upcoming Epidemic of Heart Failure in South Asia

Currently, South Asia accounts for a quarter of the world population, yet it already claims ≈60% of the global burden of heart disease. Besides the epidemics of type 2 diabetes mellitus and coronary heart disease already faced by South Asian countries, recent studies suggest that South Asians may also be at an increased risk of heart failure (HF), and that it presents at earlier ages than in most other racial/ethnic groups. Although a frequently underrecognized threat, an eventual HF epidemic in the densely populated South Asian nations could have dramatic health, social and economic consequences, and urgent interventions are needed to flatten the curve of HF in South Asia. In this review, we discuss recent studies portraying these trends, and describe the mechanisms that may explain an increased risk of premature HF in South Asians compared with other groups, with a special focus on highly relevant features in South Asian populations including premature coronary heart disease, early type 2 diabetes mellitus, ubiquitous abdominal obesity, exposure to the world's highest levels of air pollution, highly prevalent pretransition forms of HF such as rheumatic heart disease, and underdevelopment of healthcare systems. Other rising lifestyle-related risk factors such as use of tobacco products, hypertension, and general obesity are also discussed. We evaluate the prognosis of HF in South Asian countries and the implications of an anticipated HF epidemic. Finally, we discuss proposed interventions aimed at curbing these adverse trends, management approaches that can improve the prognosis of prevalent HF in South Asian countries, and research gaps in this important field.

Mexican American Immigrants Demonstrate Better Functional Stroke Outcomes Compared With Mexican American Nonimmigrants

BACKGROUND AND PURPOSE

We analyzed differences in 90-day poststroke outcomes between Mexican Americans born in the United States (nonimmigrant) compared with those born outside the United States (immigrant).

METHODS

We performed a retrospective analysis of prospective data from the population-based Brain Attack Surveillance in Corpus Christi project. We identified stroke cases from 2008 to 2016 and quantified functional, cognitive, and neurological outcomes. Associations between outcome scores and immigration status were analyzed using weighted linear regression models.

RESULTS

Eighty-three Mexican American stroke cases (n=935) were immigrants, and 852 stroke cases were nonimmigrants. Average length of stay in the United States for immigrants was 47 years. Immigrants were older (69 versus 66 years), more likely men (60% versus 49%), had less education on average, and were more likely to have atrial fibrillation compared with nonimmigrants. No differences in other comorbidities existed between groups. After adjustment for confounders, immigrants had better functional outcomes (activities of daily living/instrumental activities of daily living; mean difference, -0.22; P=0.02; 1-4, higher scores worse) and no difference in neurological outcomes (log-National Institutes of Health Stroke Scale; mean difference, -0.15; P=0.15; 0-44, higher scores worse) or cognitive outcomes (3 Mini-Mental State Examination; mean difference, -0.79; P=0.64; 0-100, lower scores worse).

CONCLUSIONS

Long-term Mexican American immigrants in this community display better stroke functional outcomes than nonimmigrant Mexican Americans and comparable neurological and cognitive outcomes.

Factors associated with suboptimal blood pressure control in a multi-ethnic population in Amsterdam

Background

Among patients using antihypertensives, blood pressure (BP) control is generally low and appears to vary between ethnicities. We aimed to identify factors associated with suboptimal BP control in a multi-ethnic population.

Methods

Cross-sectional data of the Healthy Life in an Urban Setting (HELIUS) study were used, including participants aged 18-70 years, with Dutch, African Surinamese (AS), South-Asian Surinamese (SAS), Ghanaian, Turkish or Moroccan ethnicity living in Amsterdam, the Netherlands. Suboptimal BP control was defined as BP ≥ 140/90 mmHg among participants using antihypertensives. Logistic regression analysis was performed to identify sociodemographic, lifestyle, health and psychosocial factors associated with suboptimal BP control for the total population and for each ethnic group.

Results

A total of 3,571 participants (500 Dutch, 1052 AS, 656 SAS, 637 Ghanaian, 433 Turkish, 293 Moroccan) were included in the analysis, of whom 53.3% had suboptimal BP control. Female sex (OR 0.50, 95%CI 0.43-0.59), being married (0.83, 0.72-0.96), current smoking (0.78, 0.65-0.94), obesity (1.67, 1.35-2.06), cardiovascular disease (CVD) history (0.56, 0.46-0.68), non-adherence to antihypertensives (1.26, 1.00-1.58), and family history of hypertension (1.19, 1.02-1.38) were associated with suboptimal BP control. Among ethnic subgroups, female sex was associated with lower odds of suboptimal BP control in all ethnic groups, as was current smoking (Turkish) and CVD history (Dutch, SAS, AS), whereas obesity (Dutch, AS, Turkish), older age (Turkish) and non-adherence to antihypertensives (Dutch) were associated with higher odds of suboptimal BP control.

Conclusions

Our analysis identifies several factors that are independently associated with suboptimal BP control, with only small variation between ethnic groups, suggesting that focussing on well-known determinants of suboptimal BP control is worthwhile to improve BP control rates in a multi-ethnic population.

Key messages

Several factors are associated with suboptimal blood pressure control in a multi-ethnic population, with only small variation between ethnic groups. These findings suggest that focussing on well-known determinants of suboptimal BP control is worthwhile to improve BP control rates in a multi-ethnic population.

Hypertension prevalence, awareness, treatment, and control in Surinamese living in Suriname and The Netherlands: the HELISUR and HELIUS studies

We studied hypertension prevalence, awareness, treatment, and control among persons living in a middle-income country compared with those of similar ethnicity living in a high-income country. Data from the cross-sectional HELISUR and HELIUS studies were used among 1000 Surinamese and 6971 Surinamese migrants living in The Netherlands (18-70 years), respectively. Groups were formed based on country and self-defined ethnicity, and stratified by sex. Age-adjusted odds ratios (OR) with 95% confidence intervals (CI) were calculated for hypertension prevalence, awareness, treatment, and control. Subsequently, we focused on hypertension prevalence and adjusted for risk factors for hypertension: BMI and waist circumference (model 2), educational level, physical activity, and smoking (model 3). After adjustment for age, no significant differences in hypertension prevalence, awareness, treatment, and control between countries were seen in men. However, women in Suriname were more often hypertensive with lower levels of awareness and control than those in The Netherlands (African: OR 1.54 [95% CI 1.19, 2.00]; South-Asian: 1.90 [1.35, 2.67]; awareness: 0.62 [0.43, 0.88] in African women; control: 0.48 [0.28, 0.84] in South-Asian women). Higher hypertension prevalence was explained by differences in BMI and waist circumference in African women (adjusted OR 1.26 [0.96, 1.65]) and by education, physical activity, and smoking in South-Asian women (adjusted OR 1.29 [0.87, 1.89]). Particularly, women in Suriname bear a relatively high hypertension burden with lower levels of awareness and control. As the higher hypertension prevalence was mainly explained by lifestyle-related risk factors, health promotion interventions may reduce the hypertension burden in Suriname.

The Multifaceted Pathways Linking Populism to Ethnic Minority Health Comment on "A Scoping Review of Populist Radical Right Parties’ Influence on Welfare Policy and its Implications for Population Health in Europe"

Based on a scoping review of empirical studies accompanied by interviews with experts, Rinaldi and Bekker studied the impact of populist radical right (PRR) parties on access to welfare provisions – the latter standing proxy for population health and for health inequalities in particular. We argue that populism can impact on migrant and ethnic minority health in multiple ways, in addition to the welfare mechanism specified in that review. These include institutionalised discrimination affecting individuals’ positions in the social hierarchy, experiences of discrimination in interpersonal relationships, and a weakened legitimacy of health policies. Interdisciplinary teams that include public health scholars and political scientists should take up the challenge of understanding migrant and ethnic minority health from a systems perspective.

Indirect implications of COVID-19 prevention strategies on non-communicable diseases : An Opinion Paper of the European Society of Hypertension Working Group on Hypertension and Cardiovascular Risk Assessment in Subjects Living in or Emigrating from Low Resource Settings

BACKGROUND

After its outbreak in China, the novel COronaVIrus Disease 19 is spreading across the globe. It is an emergency the world has never seen before.

MAIN TEXT

The attention of health systems is mainly focused on COronaVIrus Disease 19 patients and on the risk that intensive care units might be overwhelmed by the serious pulmonary complications. Different countries are also attempting to establish infection prevention and control strategies which proved effective in China where the outbreak was initially reported. We reflect on important lessons to be learnt from different countries. The effects that infection prevention and control strategies, such as social distancing or isolation, can have on the care of millions of patients with non-communicable diseases, who may be indirectly affected, have not been taken into consideration so much.

CONCLUSIONS

When dealing with COronaVIrus Disease 19, policy makers and healthcare personnel should consider the indirect effects on the treatment of non-communicable diseases.

Culture Matters in Communicating the Global Response to COVID-19

Current communication messages in the COVID-19 pandemic tend to focus more on individual risks than community risks resulting from existing inequities. Culture is central to an effective community-engaged public health communication to reduce collective risks. In this commentary, we discuss the importance of culture in unpacking messages that may be the same globally (physical/social distancing) yet different across cultures and communities (individualist versus collectivist). Structural inequity continues to fuel the disproportionate impact of COVID-19 on black and brown communities nationally and globally. PEN-3 offers a cultural framework for a community-engaged global communication response to COVID-19.

Inverse Association between Iron Deficiency and Glycated Hemoglobin Levels in Ghanaian Adults-the RODAM Study

BACKGROUND

Glycated hemoglobin (HbA1c) is often used to diagnose type 2 diabetes (T2D), but studies show that iron deficiency (ID) is associated with elevated HbA1c in the absence of hyperglycemia. It is unknown whether ID prevalence varies between sub-Saharan African populations living in different locations and whether ID influences HbA1c levels in these populations.

OBJECTIVES

We assessed the prevalence of ID among Ghanaian migrants in Europe and nonmigrant Ghanaians, and the influence of ID on HbA1c categories among Ghanaians without T2D.

METHODS

We used the database from the cross-sectional RODAM (Research on Obesity and Diabetes among African Migrants) study. This contained data on 3377 Ghanaian men and women aged 25-70 y living in urban and rural Ghana and Ghanaian migrants living in Amsterdam, London, and Berlin. ID was defined as ferritin < 15 ng/mL or, if C-reactive protein was ≥5 mg/mL, as ferritin < 30 ng/mL according to the WHO. We used binary logistic regression to assess differences in ID between sites and its association with clinically defined HbA1c categories (<5.5%, ≥5.5% to <6.5%, ≥6.5%). Men and women were analyzed separately.

RESULTS

The prevalence of ID was higher in migrant [28.4%; adjusted OR (aOR): 3.08; 95% CI: 2.04, 4.65)] and urban (23.2%; aOR: 2.37; 95% CI: 1.56, 3.59) women than in rural women (11.9%). Among women, ID was associated with higher odds of HbA1c ≥ 5.5% to <6.5% in the absence of hyperglycemia (aOR: 1.43; 95% CI: 1.08, 1.87). This association was not found in men.

CONCLUSIONS

Further research is needed to identify factors underlying the high prevalence of ID among urban and migrant Ghanaian women, and the association of ID with HbA1c ≥ 5.5% to <6.5% in women. In addition, our study reinforces the need to consider iron concentrations if interpreting HbA1c among African populations.

Repositioning of the global epicentre of non-optimal cholesterol

High blood cholesterol is typically considered a feature of wealthy western countries1,2. However, dietary and behavioural determinants of blood cholesterol are changing rapidly throughout the world3 and countries are using lipid-lowering medications at varying rates. These changes can have distinct effects on the levels of high-density lipoprotein (HDL) cholesterol and non-HDL cholesterol, which have different effects on human health4,5. However, the trends of HDL and non-HDL cholesterol levels over time have not been previously reported in a global analysis. Here we pooled 1,127 population-based studies that measured blood lipids in 102.6 million individuals aged 18 years and older to estimate trends from 1980 to 2018 in mean total, non-HDL and HDL cholesterol levels for 200 countries. Globally, there was little change in total or non-HDL cholesterol from 1980 to 2018. This was a net effect of increases in low- and middle-income countries, especially in east and southeast Asia, and decreases in high-income western countries, especially those in northwestern Europe, and in central and eastern Europe. As a result, countries with the highest level of non-HDL cholesterol-which is a marker of cardiovascular risk-changed from those in western Europe such as Belgium, Finland, Greenland, Iceland, Norway, Sweden, Switzerland and Malta in 1980 to those in Asia and the Pacific, such as Tokelau, Malaysia, The Philippines and Thailand. In 2017, high non-HDL cholesterol was responsible for an estimated 3.9 million (95% credible interval 3.7 million-4.2 million) worldwide deaths, half of which occurred in east, southeast and south Asia. The global repositioning of lipid-related risk, with non-optimal cholesterol shifting from a distinct feature of high-income countries in northwestern Europe, north America and Australasia to one that affects countries in east and southeast Asia and Oceania should motivate the use of population-based policies and personal interventions to improve nutrition and enhance access to treatment throughout the world.

Geographic location determines beta-cell autoimmunity among adult Ghanaians: Findings from the RODAM study

Introduction

Beta‐cell autoantibodies are established markers of autoimmunity, which we compared between Ghanaian adults with or without diabetes, living in rural and urban Ghana and in three European cities.

Methods

In the multicenter cross‐sectional Research on Obesity and Diabetes among African Migrants (RODAM) study (N = 5898), we quantified autoantibodies against glutamic acid decarboxylase (GAD65Ab) by radioligand binding assay (RBA) and established cut‐offs for positivity by displacement analysis. In a subsample, we performed RBA for zinc transporter‐8 autoantibodies (ZnT8Ab). Associations of environmental, sociodemographic, and clinical factors with GAD65Ab were calculated.

Results

In this study population (age: 46.1 ± 11.9 years; female: 62%; Ghana‐rural: 1111; Ghana‐urban: 1455; Europe: 3332), 9.2% had diabetes with adult‐onset. GAD65Ab concentrations were the highest in Ghana‐rural (32.4; 10.8‐71.3 U/mL), followed by Ghana‐urban (26.0; 12.3‐49.1 U/mL) and Europe (11.9; 3.0‐22.8 U/mL) with no differences between European cities. These distributions were similar for ZnT8Ab. Current fever, history of fever, and higher concentrations of liver enzymes marginally explained site‐specific GAD65Ab concentrations. GAD65Ab positivity was as frequent in diabetes as in nondiabetes (5.4% vs 6.1%; P = .25). This was also true for ZnT8Ab positivity.

Conclusion

Geographic location determines the occurrence of GAD65Ab and ZnT8Ab more than the diabetes status. Beta‐cell autoimmunity may not be feasible to differentiate diabetes subgroups in this population.

Prevalence of metabolic syndrome in sub-Saharan Africa: A systematic review and meta-analysis

BACKGROUND AND AIMS

There are rising levels of cardiovascular diseases (CVDs) and diabetes in Sub-Saharan Africa (SSA). Metabolic syndrome (MS) is a precursor of these conditions, but the data on the prevalence of MS in SSA are fragmented. We conducted a systematic review and meta-analysis to estimate the prevalence of MS in SSA and determine the population groups that are most at risk.

METHODS AND RESULTS

We systematically searched PubMed, Embase and African Journals Online for all published articles reporting MS prevalence in SSA populations. Random effects models were used to calculate the pooled prevalence overall and by major study-level characteristics. A total of 65 studies across fourteen different countries comprising 34,324 healthy participants aged ≥16 years were included in the meta-analysis. The overall prevalence of MS according to the different diagnostic criteria was: IDF: 18.0% (95%CI:13.3-23.3), IDF-ethnic: 16.0% (95%CI:11.3-21.4), JIS: 23.9% (95%CI: 16.5-32.3), NCEP-ATP III: 17.1% (95%CI:12.8-22.0) and WHO: 11.1% (95%CI:5.3-18.9). The prevalence of MS was higher in women than in men, and higher in (semi-)urban than in rural participants. The MS prevalence was highest in Southern Africa, followed by Eastern, Western and Central Africa. Substantial heterogeneity in the prevalence estimates across studies were not explained by major study-level characteristics, while apparent publication biases were likely artefactual.

CONCLUSIONS

MS is not rare in SSA. The prevalence of MS was highest for women, populations in urban areas, and populations in Southern Africa. Public health intervention efforts are needed to prevent further increases in the burden of MS in the region.

Obesity and cardiovascular disease risk among Africans residing in Europe and Africa: the RODAM study

BACKGROUND

The association between anthropometric variables and cardiovascular disease (CVD) risk among Africans is unclear. We examined the discriminative ability of anthropometric variables and estimate cutoffs for predicting CVD risk among Africans.

METHODS

The Research on Obesity and Diabetes among African Migrants (RODAM) study was a multisite cross-sectional study of Africans in Ghana and Europe. We calculated AHA/ACC Pooled Cohort Equations (PCE) scores for 3661 participants to ascertain CVD risk, and compared a body shape index (ABSI), body mass index (BMI), waist circumference (WC), waist-to-hip ratio (WHR), Relative Fat Mass (RFM), and Waist to Height Ratio (WHtR). Logistic regression and receiver operating curve analyses were performed to derive cutoffs for identifying high predicted CVD risk (PCE score ≥7.5%).

RESULTS

Among men, WC (adjusted Odds Ratio (aOR): 2.25, 95% CI; 1:50-3:37) was strongly associated with CVD risk. Among women, WC (aOR: 1.69, 95% CI: 1:33-2:14) also displayed the strongest association with CVD risk in the BMI-adjusted model but WHR displayed the strongest fit. All variables were superior discriminators of high CVD risk in men (c-statistic range: 0.887-0.891) than women (c-statistic range: 0.677-0.707). The optimal WC cutoff for identifying participants at high CVD risk was 89 cm among men and identified the most cases (64%). Among women, the recommended WC cutoff of 94 cm or WHR cutoff of 0.90 identified the most cases (92%).

CONCLUSIONS

Anthropometric variables were stronger discriminators of high CVD risk in African men than women. Greater WC was associated with high CVD risk in men while WHR and WC were associated with high CVD risk in women.

Prevalence and determinants of type 2 diabetes among lean African migrants and non-migrants: the RODAM study

Background

Exposure to adverse conditions earlier in life-course can predispose to type 2 diabetes in adulthood, irrespective of body mass index (BMI). However, the burden of type 2 diabetes in lean Africans is not well understood despite higher exposure to adverse early life conditions. Mirroring ongoing epidemiological transition, we assessed the burden and determinants of type 2 diabetes in a homogenous group of lean Ghanaians residing in rural and urban Ghana, and as migrants in Europe.

Methods

Baseline data from 2179 RODAM study participants with BMI<25kg/m² (25-70 years) were analyzed. Prevalence and determinants of type 2 diabetes were estimated using logistic regression analysis. Adjustments were made for socio-demographic and lifestyle factors, use of anti-diabetic medication and optimal blood glucose control.

Results

Prevalence of type 2 diabetes in rural, urban and migrant lean participants were 3.5%, 8.9% and 7.5% respectively, representing 55.4%, 35.6%, 13.2% of all participants with type 2 diabetes. Compared with lean rural participants, the odds of type 2 diabetes were higher in lean urban participants (adjusted OR = 8.81, 95% CI = 6.56-11.06), followed by migrants (5.27, 95% CI = 3.51-6.91). Irrespective of site, determinants of type 2 diabetes in lean participants include; presence of hypertension, physical inactivity, hypercholesterolemia and age (>45 years).

Conclusions

Our study shows a high prevalence of type 2 diabetes among lean African populations in different geographical settings. Future studies are needed in-order to examine how contextual differences are related to the pathophysiology of type 2 diabetes in lean individuals.

Acculturation and Food Intake Among Ghanaian Migrants in Europe: Findings From the RODAM Study

OBJECTIVE

This study examined the role of migration and acculturation in the diet of Ghanaian migrants in Europe by (1) comparing food intake of Ghanaian migrants in Europe with that of Ghanaians living in Ghana and (2) assessing the association between acculturation and food intake.

DESIGN

Data from the cross-sectional multicenter study Research on Obesity and Diabetes among African Migrants were used. Food intake was assessed using a Ghana-specific food propensity questionnaire (134 items and 14 food groups); foods were grouped based on a model of dietary change proposed by Koctürk-Runefors.

SETTING

Ghana, London, Amsterdam, and Berlin.

PARTICIPANTS

A total of 4,534 Ghanaian adults living in Ghana and Europe, with complete dietary data. Of these, 1,773 Ghanaian migrants had complete acculturation data.

MAIN OUTCOME MEASURE

Food intake (the weighted intake frequency per week of food categories).

ANALYSIS

Linear regression.

RESULTS

Food intake differed between Ghanaians living in Ghana and Europe. Among Ghanaian migrants in Europe, there were inconsistent and small associations between acculturation and food intake, except for ethnic identity, which was consistently associated with intake only of traditional staples.

CONCLUSIONS AND IMPLICATIONS

Findings indicate that migration is associated with dietary changes that cannot be fully explained by ethnic, cultural, and social acculturation. The study provides limited support to the differential changes in diet suggested by the Koctürk-Runefors' model of dietary change.

Abstract TP182: Stroke Outcome in Mexican American Immigrants and Non-Immigrants

Background/Objective: We studied the association of being born outside of the U.S. (immigrant) or born in the U.S. (non-immigrant) with 90 day post-stroke outcomes in a population-based stroke study in Texas.

Methods: Stroke cases from 2008-2016 were identified from the Brain Attack Surveillance in Corpus Christi (BASIC) project. Outcomes among survivors included ADL/IADL score (higher scores worse) for functional assessment, 3MSE (cognition, lower scores worse), and NIHSS Score (neurologic, higher scores worse). Weighted linear regression models were used to assess the effect of immigration status on the outcomes. Analysis was completed using multiple imputation and inverse probability weighting to account for differential attrition.

Results: Of 935 Mexican Americans available for analysis, 83 were immigrants and 852 were non-immigrants. Immigrants had resided in the U.S. on average 47 years. Immigrants were significantly older (69 vs. 66 years), more likely male (60% vs. 49%), more likely to have atrial fibrillation and have less education than non-immigrants (all p<0.05). No differences in hypertension, diabetes, cholesterol, insurance, smoking or other comorbidities existed. The Table provides the data from the fully adjusted models. Immigrants had better functional outcome (mean difference (MD) = -0.22; p=0.02), and no difference for neurologic outcome (MD= -0.15; p=0.15). There was an association of worse cognitive outcome in immigrants (MD= -5.25; p=0.009), however, the association was explained by attenuated after the adjustment for the lower educational attainment in immigrants (MD= -0.79; p=0.64).

Conclusions: In this community, there was no evidence of worse stroke outcome among Mexican American immigrants, who had lived in the U.S. for decades, compared with non-immigrants. Further studies of more recent immigrant populations are warranted.

Epigenome-wide association study in whole blood on type 2 diabetes among sub-Saharan African individuals: findings from the RODAM study

BACKGROUND

Type 2 diabetes (T2D) results from a complex interplay between genetics and the environment. Several epigenome-wide association studies (EWAS) have found DNA methylation loci associated with T2D in European populations. However, data from African populations are lacking. We undertook the first EWAS for T2D among sub-Saharan Africans, aiming at identifying ubiquitous and novel DNA methylation loci associated with T2D.

METHODS

The Illumina 450k DNA-methylation array was used on whole blood samples of 713 Ghanaian participants (256 with T2D, 457 controls) from the cross-sectional Research on Obesity and Diabetes among African Migrants (RODAM) study. Differentially methylated positions (DMPs) for T2D and HbA1c were identified through linear regression analysis adjusted for age, sex, estimated cell counts, hybridization batch, array position and body mass index (BMI). We also did a candidate analysis of previously reported EWAS loci for T2D in non-African populations, identified through a systematic literature search.

RESULTS

Four DMPs [cg19693031 (TXNIP), cg04816311 (C7orf50), cg00574958 (CPT1A), cg07988171 (TPM4)] were associated with T2D after correction for inflation by possible systematic biases. The most strongly associated DMP-cg19693031, TXNIP (P = 2.6E-19) -showed hypomethylation in T2D cases compared with controls. Two out of the four DMPs [cg19693031 (TXNIP), cg04816311 (C7orf50)] remained associated with T2D after adjustment for BMI, and one locus [cg07988171 (TPM4)] that has not been reported previously.

CONCLUSIONS

In this first EWAS for T2D in sub-Saharan Africans, we have identified four DMPs at epigenome-wide level, one of which is novel. These findings provide insight into the epigenetic loci that underlie the burden of T2D in sub-Saharan Africans.

Factors hindering hypertension control: perspectives of front-line health professionals in rural Ghana

OBJECTIVE

Hypertension (HTN) control remains a major public health challenge in sub-Saharan Africa (SSA). Health professionals influence patient adherence and self-management practices for HTN particularly in rural and lower socio-economic communities in SSA. Contextual evidence on the reasons for the suboptimal control of HTN in clinical settings is crucial to improving health delivery practices for HTN and preventing HTN related-complications.

STUDY DESIGN

A cross-sectional qualitative study.

METHODS

Semistructured interviews were conducted among 40 purposively sampled front-line health professionals in seven health facilities in northern Ghana. Data were analysed using a thematic approach through pre-identified and evolving themes.

RESULTS

We identified three key themes underlying the poor HTN control. First, health professionals' barriers included communication difficulties, poor collaboration and referrals among health professionals and limited training on HTN and other non-communicable diseases (NCDs). Secondly, health system-related barriers included limited health personnel, drug shortages, inadequate facilities and equipment and challenges with National Health Insurance (NHIS). The third theme was patient-related barriers including non-adherence, use of traditional treatments, sociocultural factors and lack of appreciation.

CONCLUSION

A holistic public health approach, which builds upon health professionals' capacities, harnesses and integrates into existing health policy and systems structures and empowers and collaborates with communities could contribute to improving HTN control in rural settings. Health policymakers need to consider the sociocultural, economic and geographical characteristics in such settings, which influence health service delivery practices in designing and implementing HTN interventions. There is also a need for health policy to integrate NCD training and management of multiple and comorbid conditions into the training curriculum of health training institutions to build health professionals capacity to facilitate the uptake of evidence-based NCD interventions and manage the double burden of diseases.

Gene-environment Interaction on the Risk of Type 2 Diabetes Among Ethnic Minority Populations Living in Europe and North America: A Systematic Review

BACKGROUND

The body of evidence on gene-environment interaction (GEI) related to type 2 diabetes (T2D) has grown in the recent years. However, most studies on GEI have sought to explain variation within individuals of European ancestry and results among ethnic minority groups are inconclusive.

OBJECTIVE

To investigate any interaction between a gene and an environmental factor in relation to T2D among ethnic minority groups living in Europe and North America.

METHODS

We systematically searched Medline and EMBASE databases for the published literature in English up to 25th March 2019. The screening, data extraction and quality assessment were performed by reviewers independently.

RESULTS

1068 studies identified through our search, of which nine cohorts of six studies evaluating several different GEIs were included. The mean follow-up time in the included studies ranged from 5 to 25.7 years. Most studies were relatively small scale and few provided replication data. All studies included in the review included ethnic minorities from North America (Native-Americans, African- Americans, and Aboriginal Canadian), none of the studies in Europe assessed GEI in relation to T2D incident in ethnic minorities. The only significant GEI among ethnic minorities was HNF1A rs137853240 and smoking on T2D incident among Native-Canadians (Pinteraction = 0.006).

CONCLUSION

There is a need for more studies on GEI among ethnicities, broadening the spectrum of ethnic minority groups being investigated, performing more discovery using genome-wide approaches, larger sample sizes for these studies by collaborating efforts such as the InterConnect approach, and developing a more standardized method of reporting GEI studies are discussed.

Differential associations between psychosocial stress and obesity among Ghanaians in Europe and in Ghana: findings from the RODAM study

PURPOSE

Psychosocial stress is associated with obesity in some populations, but it is unclear whether the association is related to migration. This study explored associations between psychosocial stress and obesity among Ghanaian migrants in Europe and non-migrant Ghanaians in Ghana.

METHODS

Cross-sectional data from the RODAM study were used, including 5898 Ghanaians residing in Germany, the UK, the Netherlands, rural Ghana, and urban Ghana. Perceived discrimination, negative life events and stress at work or at home were examined in relation to body mass index (BMI) and waist circumference (WC). Linear regression analyses were performed separately for migrants and non-migrants stratified by sex.

RESULTS

Perceived discrimination was not associated with BMI and WC in both migrants and non-migrants. However, negative life events were positively associated with BMI (β = 0.78, 95% CI 0.34-1.22) and WC (β = 1.96, 95% CI 0.79-3.12) among male Ghanaian migrants. Similarly, stress at work or at home was positively associated with BMI (β = 0.28, 95% CI 0.00-0.56) and WC (β = 0.84, 95% CI 0.05-1.63) among male Ghanaian migrants. Among non-migrant Ghanaians, in contrast, stress at work or at home was inversely associated with BMI and WC in both males (β = - 0.66, 95% CI - 1.03 to - 0.28; β = - 1.71 95% CI - 2.69 to - 0.73, respectively) and females (β = - 0.81, 95% CI - 1.20 to - 0.42; β = - 1.46, 95% CI - 2.30 to - 0.61, respectively).

CONCLUSIONS

Negative life events and stress at work or at home are associated with increased body weight among male Ghanaians in European settings, whereas stress at work or at home is associated with reduced body weight among Ghanaians in Ghana. More work is needed to understand the underlying factors driving these differential associations to assist prevention efforts.

Higher prevalence of peripheral arterial disease in Ghana compared to Ghanaian migrants in Europe: The RODAM study

BACKGROUND

Evidence suggests that the burden of peripheral artery disease (PAD) is rising more rapidly than other forms of cardiovascular diseases in sub-Saharan Africa, but the extent to which they differ between rural and urban settings in Africa and upon migration to Europe is unknown. We assessed the burden of PAD among Ghanaians living in rural- and urban-Ghana and Ghanaian migrants living in three European countries.

METHODS

Cross-sectional analyses of baseline data from the multicenter Research on Obesity and Diabetes among African Migrants (RODAM) study were done. Data from 5516 participants living in Europe (1487 Amsterdam, 546 Berlin, 1047 London) and Ghana [1419 urban and 1017 rural] aged 25-70years were included. PAD was defined as ankle brachial index≤0.90. Comparisons among sites were made using logistic regression analysis.

RESULTS

The age-standardized prevalence of PAD was higher in Ghanaians living in rural [7.52%, 95% CI = 5.87-9.51] and urban [8.93%, 7.44-10.64] Ghana than for their compatriots living in Europe [5.70%, 4.35-7.35 for London; 3.94%, 2.96-5.14 for Amsterdam; and 0.44%, 0.05-1.58 for Berlin]. The differences persisted even after adjustment for age, sex, education and the conventional cardiovascular risk factors [adjusted odds ratio = 3.16, 95% CI = 2.16-4.61, p < .001 for rural-Ghana; and 2.93, 1.87-4.58, p < .00 for urban-Ghana, compared with Ghanaian migrants in Europe].

CONCLUSIONS

Our study shows that Ghanaians living in Ghana have higher prevalence of PAD than their migrant compatriots. Further work is needed to identify potential factors driving the high prevalence of PAD among non-migrant Ghanaians to assist interventions aimed at reducing PAD burden.

Hyperuricaemia and its association with 10-year risk of cardiovascular disease among migrant and non-migrant African populations: the RODAM study

OBJECTIVE

In the advent of rapid urbanisation, migration and epidemiological transition, the extent to which serum uric acid (sUA) affects cardiovascular disease (CVD) risk among Africans is not well understood. We assessed differences in sUA levels and associations with CVD risk among migrant Ghanaians in Europe and non-migrant Ghanaians in rural and urban Ghana.

METHODS

Baseline data from 633 rural, 916 urban and 2315 migrant participants (40-70 years) from the cross-sectional RODAM study were analysed. Hyperuricaemia was defined as sUA >7 mg/dl in men and >6 mg/dl in women. The 10-year risk of atherosclerotic cardiovascular disease (ASCVD) was calculated using the American College of Cardiology (ACC)/American Heart Association (AHA) risk score which takes into account ethnic minority populations. High CVD risk was defined as ASCVD risk scores ≥7.5%. Logistic regressions were used to assess associations between hyperuricaemia and CVD risk.

RESULTS

Prevalence for hyperuricaemia in rural, urban and migrant participants was 17.4%, 19.1% and 31.7% for men, and 15.9%, 18.2% and 33.2% for women, respectively. Hyperuricaemia was positively associated with elevated CVD risk among rural residents (adjusted OR for men 3.28, 95% CI: 1.21-8.96, 6.36, 95% CI: 2.98-13.56 for women), urban residents (1.12, 95% CI: 0.45-2.81 for men, 2.11, 95% CI: 1.26-3.52 for women) and migrants (1.73, 95% CI: 1.01-2.96 for men, 4.61, 95% CI: 3.05-6.97 for women).

CONCLUSION

Our study shows variations of sUA levels in different African contexts. Hyperuricaemia is associated with elevated 10-year CVD risk in both migrants and non-migrants. Further studies should identify factors driving associations between sUA and CVD risk in Africans.

Psychosocial factors and hypertension prevalence among Ghanaians in Ghana and Ghanaian migrants in Europe: The RODAM study

Despite progress made to prevent and control hypertension, its prevalence has persisted in many countries. This study examined the associations between psychosocial factors and hypertension among Ghanaian non-migrants and migrants. Data were drawn from the Research on Obesity and Diabetes among African Migrants (RODAM) project. Findings show that among migrant women, those who experienced periods of stress at home/work had higher odds of hypertension. Among non-migrants, women with depression symptoms were more likely to be hypertensive. Furthermore, there was a positive association between negative life events and hypertension among non-migrant men. The findings highlight the importance of psychosocial factors in addressing hypertension prevalence in Ghanaian populations.

Dyslipidaemia among Ghanaian migrants in Europe and their compatriots in Ghana: the RODAM Study

Background

Sub-Saharan African (SSA) populations are believed to have a favourable lipid profile compared to European populations. However, geographical differences in the lipid profile of a homogenous SSA population residing in different geographical locations have not yet been assessed.

Methods

We used data from the multicentre, cross-sectional RODAM study including Ghanaian adults residing in rural and urban Ghana and in London, Amsterdam and Berlin (n = 5482). Dyslipidaemias were defined based on the 2012 European Guideline on Cardiovascular Prevention. The age-adjusted prevalence of dyslipidaemias was compared between the sites using prevalence ratios (PRs) adjusted for lifestyle and dietary covariates in different models.

Results

The age-standardised prevalence rate of high total cholesterol (TC) and LDL-cholesterol (LDL-C) was lower in rural than in urban Ghana and Ghanaian migrants in Europe. Adjusted PRs of high TC and LDL-C were higher in urban Ghana (TC PR = 2.15, 95% confidence interval 1.69-2.73) and Ghanaian migrant men (TC PR = 2.03 (1.56-2.63)) compared to rural Ghana, but there was no difference between rural and Ghanaian migrant women (TC PR = 1.01 (0.84-1.22)). High triglyceride levels were as prevalent in rural Ghana (11.6%) as in urban Ghana (12.8%), but were less prevalent in Ghanaian migrant women (2.0%). In both sexes, low HDL-cholesterol was most prevalent in rural Ghana (50.1%) and least prevalent in Europe (12.9%).

Conclusions

The lipid profile of Ghanaians varied by geographical location, and differential gradients of the individual dyslipidaemias could be observed between the locations. Additional research is needed to identify factors driving these differential risks in order to assist prevention efforts.

Key messages

The lipid profile of Ghanaians in urban Ghana and Europe is less favourable compared to the lipid profile of rural Ghanaian residents. Substantial differences in lipid profiles could be observed between the geographical locations.

Association between psychosocial stress and obesity among migrant and non-migrant Ghanaians

Background

Psychosocial stress is associated with obesity in some populations, but it is unclear whether the association is related to migration.

Aim

This study explored associations between psychosocial stress and obesity among Ghanaian migrants in Europe and non-migrant Ghanaians in Ghana.

Methods

Cross-sectional data from the RODAM study were used, including 5898 Ghanaians residing in Germany, the UK, the Netherlands, rural Ghana, and urban Ghana. Perceived discrimination, negative life events and stress at work or at home were examined in relation to body mass index (BMI) and waist circumference (WC). Linear regression analyses were performed separately for migrants and non-migrants stratified by sex.

Results

Perceived discrimination was not associated with BMI and WC in both migrants and non-migrants. However, negative life events were positively associated with BMI (β = 0.78, 95% CI, 0.34 to 1.22) and WC (β = 1.96, 95% CI, 0.79 to 3.12) among male Ghanaian migrants. Among non-migrant Ghanaians, in contrast, stress at work or at home was inversely associated with BMI and WC in both males (β=-0.66, 95% CI, -1.03 to -0.28; β=-1.71 95% CI, -2.69 to -0.73, respectively) and females (β=-0.81, 95% CI, -1.20 to -0.42; β=-1.46, 95% CI, -2.30 to -0.61, respectively).

Conclusions

Negative life events are associated with increased body weight among Ghanaians in European settings, whereas stress at work or at home is associated with reduced body weight among Ghanaians in Ghana. More work is needed to understand the underlying factors driving these differential associations in order to assist prevention efforts.

Key messages

Negative life events are associated with increased body weight among Ghanaians in European settings, whereas stress at work or at home is associated with reduced body weight among Ghanaians in Ghana. More work is needed to understand the underlying factors driving these differential associations in order to assist prevention efforts.

Hyperuricemia And Estimated Cardiovascular Risk Among Migrant and non-migrant Africans

Objective

In the advent of rapid urbanization, migration and epidemiological transition, the extent to which serum uric acid (sUA) affects cardiovascular disease (CVD) risk among Africans is not well understood. We assessed differences in sUA levels and associations with estimated CVD risk among migrant Ghanaians in Europe, and non-migrant Ghanaians in rural and urban Ghana.

Methods

Baseline data from 633 rural, 916 urban and 2315 migrant RODAM study participants (40-70 years) were analyzed. Hyperuricemia was defined as sUA &gt;7mg/dl in males and &gt;6mg/dl in females. Elevated CVD risk was defined as pooled cohort equation estimates ≥ 7.5%. Logistic regressions were used to assess differences in hyperuricemia and associations with estimated CVD risk. Receiver operator curves were used to calculate sUA cut off values that maximised likelihood of elevated CVD risk.

Results

Prevalence for hyperuricemia in rural, urban and migrant participants were 17.4%, 19.1% and 31.7% for men, and 15.9%, 18.2% and 33.2% for women, respectively. Hyperuricemia was positively associated with elevated CVD risk among rural residents(adjusted OR for men 2.88, 95%CI, 1.20-6.88, 5.32, 95%CI, 2.86-9.95 for women), urban residents(1.26, 95%CI, 0.59-2.69 for men, 2.41, 95%CI, 1.56-3.73 for women) and migrants(2.39, 95%CI, 1.57-3.64) for men, 3.74, 95%CI, 2.78-5.02 for women). SUA cut-off values were 6.8mg/dl in men and 5.2mg/dl in women.

Conclusions

Our study shows variations of sUA levels in different African contexts. Hyperuricemia is associated with elevated estimated CVD risk in both migrants and non-migrants. Further studies should identify factors driving associations between SUA and CVD risk in Africans.

Key messages

Hyperuricemia is a risk factor for cardiovascular risk in both migrants and non-migrants. Cardiovascular risk is seen at low levels of serum uric acid levels in Africans.

Metabolic syndrome among Ghanaian migrants and their homeland counterparts: the RODAM study

Background

Metabolic syndrome (MetSyn) is a major risk factor for type 2 diabetes (T2D) and cardiovascular disease (CVD). T2D and CVD are a major burden among African populations both in Africa and in high-income countries. However, it is unknown whether the prevalence of MetSyn shows geographical differences between a homogenous population residing in different settings in Africa and Europe.

Methods

We used data from the cross-sectional multi-centre Research on Obesity and Diabetes among African Migrants (RODAM) study that was conducted among Ghanaians aged 25-70 years residing in rural and urban Ghana and in Amsterdam, London and Berlin (n = 5659). MetSyn was defined according to the 2009 harmonized definition. Geographical locations were compared using age-standardised prevalence rates and prevalence ratios (PRs), adjusted for age, education, physical activity and smoking.

Results

In men, the age-standardised prevalence of MetSyn was 8.3% in rural Ghana and showed a positive gradient through urban Ghana (23.6%, PR = 1.85, 95% confidence interval 1.17-2.92) to Europe, with the highest prevalence in Amsterdam (31.4%; PR = 4.45, 2.94-6.75). In women, there was a rural to urban gradient in MetSyn prevalence (rural Ghana 25%, urban Ghana 34.4%, PR = 1.38, 1.13-1.68), but small differences in MetSyn prevalence between urban Ghanaian and European Ghanaian women (Amsterdam 38.4%). The prevalence rates of the individual MetSyn components showed a positive rural-urban-Europe gradient. However, compared to their urban and European counterparts, a low HDL-C level was significantly more prevalent among rural Ghanaians.

Conclusions

MetSyn and its components are highly prevalent in Ghana as well as in Ghanaian migrants in Europe. To understand the mechanisms driving the geographical differences in MetSyn, further research is needed, thereby aiming for the reduction of T2D and CVD prevalence in SSA populations.

Key messages

Metabolic syndrome is more prevalent in urban compared to rural Ghana, and even more prevalent in Ghanaian migrants in Europe. Its components show the same positive gradient, expect for low HDL-C, which shows a negative gradient.

Chronic kidney disease burden among African migrants in three European countries and in urban and rural Ghana: the RODAM cross-sectional study

Background

Chronic kidney disease (CKD) is a major burden among sub-Saharan African (SSA) populations. However, differences in CKD prevalence between rural and urban settings in Africa, and upon migration to Europe are unknown. We therefore assessed the differences in CKD prevalence among homogenous SSA population (Ghanaians) residing in rural and urban Ghana and in three European cities, and whether conventional risk factors of CKD explained the observed differences. Furthermore, we assessed whether the prevalence of CKD varied among individuals with hypertension and diabetes compared with individuals without these conditions.

Methods

For this analysis, data from Research on Obesity & Diabetes among African Migrants (RODAM), a multi-centre cross-sectional study, were used. The study included a random sample of 5607 adult Ghanaians living in Europe (1465 Amsterdam, 577 Berlin, 1041 London) and Ghana (1445 urban and 1079 rural) aged 25-70 years. CKD status was defined according to severity of kidney disease using the combination of glomerular filtration rate (G1-G5) and albuminuria (A1-A3) levels as defined by the 2012 Kidney Disease: Improving Global Outcomes severity classification. Comparisons among sites were made using logistic regression analysis.

Results

CKD prevalence was lower in Ghanaians living in Europe (10.1%) compared with their compatriots living in Ghana (13.3%) even after adjustment for age, sex and conventional risk factors of CKD [adjusted odds ratio (OR) = 0.70, 95% confidence interval (CI) 0.56-0.88, P = 0.002]. CKD prevalence was markedly lower among Ghanaian migrants with hypertension (adjusted OR = 0.54, 0.44-0.76, P = 0.001) and diabetes (adjusted OR = 0.37, 0.22-0.62, P = 0.001) compared with non-migrant Ghanaians with hypertension and diabetes. No significant differences in CKD prevalence was observed among non-migrant Ghanaians and migrant Ghanaians with no hypertension and diabetes. Among Ghanaian residents in Europe, the odds of CKD were lower in Amsterdam than in Berlin, while among Ghanaian residents in Ghana, the odds of CKD were lower in rural Ghana (adjusted OR = 0.68, 95% CI 0.53-0.88, P = 0.004) than in urban Ghana, but these difference were explained by conventional risk factors.

Conclusion

Our study shows important differences in CKD prevalence among Ghanaians living in Europe compared with those living in Ghana, independent of conventional risk factors, with marked differences among those with hypertension and diabetes. Further research is needed to identify factors that might explain the observed difference across sites to implement interventions to reduce the high burden of CKD, especially in rural and urban Ghana.

Illness representations and coping practices for self-managing hypertension among sub-Saharan Africans: A comparative study among Ghanaian migrants and non-migrant Ghanaians

OBJECTIVE

Hypertension (HTN) control is a major obstacle among sub-Saharan African populations partly due to poor self-management. We explored and compared how persons' social and physical context shapes their illness representations regarding HTN and the coping strategies they develop and adapt to mitigate challenges in self-managing HTN.

METHODS

A cross sectional multisite qualitative study using semi-structured interviews among 55 Ghanaians with HTN living in The Netherlands and urban and rural Ghana. A thematic approach was used in data analysis.

RESULTS

Family HTN history, personal experiences with HTN and outcomes of using biomedical and traditional treatments shaped participants' illness representations and coping strategies. Migrants and urban non-migrants modified medication schedules and integrated taking medication into daily routine activities to cope with experienced side effects of taking antihypertensive medication while rural non-migrants used traditional remedies and medicines to mitigate experienced medication side effects and/or in search for a cure for HTN.

CONCLUSION

Contextual factors within participants' social and physical environments shape their illness representations and coping strategies for HTN though interactive phrases.

PRACTICE IMPLICATIONS

Health professionals should harness the relationships within peoples' social and physical environments, encourage implementation of family-wide behavioural changes and involve family and communities in HTN treatment to enhance patients' self-management of HTN.

Is social support associated with hypertension control among Ghanaian migrants in Europe and non-migrants in Ghana? The RODAM study

Hypertension (HTN) control is crucial in preventing HTN-related complications such as stroke and coronary heart disease. Yet, HTN control remains suboptimal particularly among sub-Saharan African (SSA) populations partly due to poor self-management. Self-management of HTN is influenced by social support, but the evidence on the role of social support on HTN control particularly among SSA populations is limited. This study assessed the association between multiple proxies for social support and HTN control among Ghanaians resident in Ghana and Europe. The Research on Obesity and Diabetes among African Migrants (RODAM) study participants with HTN and who self-reported HTN (n = 1327) were included in this analysis. Logistic regression was used to assess the association between proxies of social support and HTN control (SBP < 140 mmHg and DBP < 90 mmHg) with adjustments for age and socioeconomic status (SES). Among Ghanaian males in both Europe and Ghana, cohabiting with more than two persons was associated with increased odds of having HTN controlled. Male hypertensive patients cohabiting with ≥ 5 persons had the highest odds of having HTN controlled after adjustment for age and SES (OR 0.30; 95% CI 0.16-0.57; 0.60; 0.34-1.04, respectively). This association was not observed among females. Relationship status, frequency of religious activity attendance and satisfaction with social support did not show any significant association with HTN control. Our study shows that cohabitation is significantly associated with HTN control but in males only. The other proxies for social support appeared not to be associated with HTN control. Involving persons living with Ghanaian men with HTN in the treatment process may help to improve adherence to HTN treatment. Further research is needed to explore in-depth, how these social support proxies could contribute to improved HTN control among SSA populations.

A population-based retrospective study comparing cancer mortality between Moluccan migrants and the general Dutch population: equal risk 65 years after immigration?

OBJECTIVE

To test the hypothesis that cancer mortality rates among the Moluccan-Dutch, the oldest non-Western migrant group to arrive in the Netherlands after the Second World War, are similar to those in the general Dutch population.

DESIGN

Population-based retrospective study.

SETTING

Data from the national cause of death registry in the Netherlands and municipal registries.

PARTICIPANTS

Using historic records containing family names of all Moluccan-Dutch who arrived in the Netherlands in 1951, we identified 81 591 Moluccan-Dutch persons in the national cause of death registry of the Netherlands. The reference group consisted of 15 866 538 persons of the general Dutch population.

OUTCOME MEASURES

Mortality data were linked to demographic data from municipal registries. We calculated all-cancer and cancer-specific mortality and measured differences between the two groups using Poisson regression, adjusting for sex, age and area socioeconomic status. We conducted a sub-analysis for the first-generation and second-generation Moluccan-Dutch.

RESULTS

There was no difference in all-cancer mortality between Moluccan-Dutch and the general Dutch population. Mortality was higher among Moluccan-Dutch for liver, cervix and corpus uteri cancers, but lower for stomach, oesophagus, kidney and nervous system cancers. For most cancers, mortality risk as compared with the general Dutch population varied between different generations of Moluccan-Dutch.

CONCLUSIONS

Several decades after migration, the Moluccan-Dutch show similar all-cancer mortality, but different cancer-specific mortality rates, when compared with the general Dutch population.

Cross-sectional study of association between psychosocial stressors with chronic kidney disease among migrant and non-migrant Ghanaians living in Europe and Ghana: the RODAM study

OBJECTIVES

The association between psychosocial stressors (PS) and chronic kidney disease (CKD) among sub-Saharan African (SSA) populations is unknown. We examined the association between PS and CKD prevalence among rural and urban Ghanaians and Ghanaian migrants living in three European cities. We also assessed if the influence of PS on CKD is partially mediated by primary risk factors (hypertension and diabetes) of CKD.

DESIGN

A multi-centred cross sectional data from the Research on Obesity and Diabetes among African Migrants study.

SETTING

Rural and urban Ghana and three European cities (Amsterdam, Berlin and London).

PARTICIPANTS

A random sample of 5659 adults (Europe 3167, rural Ghana 1043 and urban Ghana 1449) aged 25-70 years.

EXPLANATORY MEASURES

PS defined by negative life events, perceived discrimination, perceived stress at work/home and depressive symptoms. Three CKD outcomes were considered using the 2012 Kidney Disease: Improving Global Outcomes severity of CKD classification. Comparisons between PS and CKD outcomes were made using logistic regression analyses across all sites.

RESULTS

We observed higher proportion of negative life events (68.7%) and perceived permanent stress (15.9%) among Ghanaians living in Ghana than Ghanaians living in Europe. Depressive symptoms (7.5%) and perceived discrimination (29.7%) were more common among Ghanaians living in Europe than Ghanaians living in Ghana. No significant association was observed between any of the PS constructs and CKD outcomes across sites except for positive association between stress at work/home and albuminuria (2.81, 95% CI 1.46 to 5.40) and CKD risk (2.78, 95% CI 1.43 to 5.43) among Ghanaians living in Berlin.

CONCLUSION

Our study found a positive association between stress at work/home and albuminuria and CKD risk. There was no convincing evidence of associations between the other PS constructs and the prevalence of CKD risk. Further studies are needed to identify potential factors driving the high prevalence of CKD among these populations.

Microvascular and macrovascular complications in type 2 diabetes Ghanaian residents in Ghana and Europe: The RODAM study

AIMS

To compare microvascular and macrovascular complication rates among Ghanaians with type 2 diabetes (T2D) living in Ghana and in three European cities (Amsterdam, London and Berlin).

METHODS

Data from the multicenter Research on Obesity and Diabetes among African Migrants (RODAM) study were analyzed. 650 Ghanaian participants with T2D (206 non-migrant and 444 migrants) were included. Logistic regression analyses were used to determine the association between migrant status and microvascular (nephropathy and retinopathy) and macrovascular (coronary artery disease (CAD), peripheral artery disease (PAD) and stroke) complications with adjustment for age, gender, socioeconomic status, alcohol, smoking, physical activity, hypertension, BMI, total-cholesterol, and HbA1c.

RESULTS

Microvascular and macrovascular complications rates were higher in non-migrant Ghanaians than in migrant Ghanaians (nephropathy 32.0% vs. 19.8%; PAD 11.2% vs. 3.4%; CAD 18.4% vs. 8.3%; and stroke 14.5% vs. 5.6%), except for self-reported retinopathy (11.0% vs. 21.6%). Except nephropathy and stroke, the differences persisted after adjustment for the above-mentioned covariates: PAD (OR 7.48; 95% CI, 2.16-25.90); CAD (2.32; 1.09-4.93); and retinopathy (0.23; 0.07-0.75).

CONCLUSIONS

Except retinopathy, the rates of microvascular and macrovascular complications were higher in non-migrant than in migrant Ghanaians with T2D. Conventional cardiovascular risk factors did not explain the differences except for nephropathy and stroke.

20 year trends in renal disease mortality in Ghana: A review of autopsies

AIM

Data on the changing levels in renal morbidity and mortality are scant globally. We sought to assess trends in renal disease mortality and attributable causes over a 20 year period in Ghana.

METHODS

A retrospective analysis of 20 year autopsy records of the Pathology Departments of leading teaching hospitals in Ghana, (Korle-Bu Teaching Hospital (KBTH) in Accra and Komfo Anokye Teaching Hospital (KATH) in Kumasi) from January 1994 to December 2013. Data comprising autopsies from in-patients, community cases and coroners' cases were used. We defined primary cause of death as death directly due to renal disease and secondary cause of death as death in which renal disease was a comorbid or contributing factor.

RESULTS

Over the period, there were a total of 94 309 deaths, of which 5608 were attributed to renal disease (5.9/100). Mortality rate remained fairly the same from 1994 to 2009 (5.0%), but doubled from 2010 to 2013 (10.8%). Similar trends were observed among males and females during the same period. However, males had slightly higher mortality rates (6.6%; 95% CI: 46.1%-6.8%) compared to females (5.6%; 95% CI: 5.4%-5.8%; P = 0.271). The major leading attributable causes of renal disease death include end stage renal disease 45.0% and acute pyelonephritis accounting for 20.9% of the cases. Hypertensive heart disease accounted for 30.0% of all secondary cause of death while congestive heart disease and septicaemia accounted for 13.0% and 12.0%, respectively.

CONCLUSIONS

We observed marked increase in the renal disease mortality rate during the last few years predominantly driven by chronic and infectious related renal diseases as a main cause, and hypertensive heart disease and congestive heart failure as the main secondary causes. Measures geared towards prevention, treatment and managing such conditions may impact on the reduction of renal disease mortality rate among Ghanaian populations.

Eligibility for cardiovascular risk screening among different ethnic groups: The HELIUS study

BACKGROUND

Ethnic differences in the age-of-onset of cardiovascular risk factors may necessitate ethnic-specific age thresholds to initiate cardiovascular risk screening. Recent European recommendations to modify cardiovascular risk estimates among certain ethnic groups may further increase this necessity.

AIMS

To determine ethnic differences in the age to initiate cardiovascular risk screening, with and without implementation of ethnic-specific modification of estimated cardiovascular risk.

METHODS

We included 18,031 participants of Dutch, South-Asian Surinamese, African Surinamese, Ghanaian, Turkish and Moroccan background from the HELIUS study (Amsterdam). Eligibility for cardiovascular risk screening was defined as being eligible for blood pressure-lowering treatment, based on a combination of systolic blood pressure, estimated cardiovascular risk, and ethnic-specific conversion of estimated cardiovascular risk as recommended by European cardiovascular disease prevention guidelines. Age-specific proportions of eligibility were determined and compared between ethnic groups via logistic regression analyses.

RESULTS

Dutch men reached the specified threshold to initiate cardiovascular risk screening (according to Dutch guidelines) at an average age of 51.5 years. Among ethnic minority men, this age ranged from 39.8 to 52.4. Among Dutch women, the average age threshold was 53.4. Among ethnic minority women, this age ranged from 36.8 to 49.1. Age-adjusted odds of eligibility were significantly higher than in the Dutch among all subgroups, except among Moroccan men. Applying ethnic-specific conversion factors had minimal effect on the age to initiate screening in all subgroups.

CONCLUSIONS

Most ethnic minority groups become eligible for blood pressure-lowering treatment at a lower age and may therefore benefit from lower age-thresholds to initiate cardiovascular risk screening.

Early-life factors are associated with waist circumference and type 2 diabetes among Ghanaian adults: The RODAM Study

Early-life experiences may fuel the emergence of obesity and type 2 diabetes among African populations. We evaluated childhood socio-economic status (SES) and childhood nutritional status as risk factors for increased waist circumference and type 2 diabetes among Ghanaian adults. In the multi-center, cross-sectional Research on Obesity and Diabetes among African Migrants (RODAM) Study, we calculated associations (adjusted for demographics and lifestyle) of parental education and anthropometric markers of childhood nutrition [leg length, leg length-to-height ratio (LHR)] with waist circumference and type 2 diabetes, respectively. Among 5,575 participants (mean age: 46.2 years; 62% female), lower education of either parent (vs. higher) was consistently associated with higher waist circumference (∆: 1.6-3.4 cm). Lower father's education tended to increase the odds of type 2 diabetes by 50% in women (95% confidence interval (CI): 1.0, 2.4). Reduced leg length and LHR were associated with higher waist circumference. But only in men, leg length was inversely related to type 2 diabetes (OR per 1 standard deviation decrease: 1.1; 95% CI: 1.0, 1.3). In this study, markers of poor childhood SES and early-life nutritional status relate to abdominal obesity in men and women and to type 2 diabetes in men. Thus, prevention efforts should start in early childhood.