Variations in Cardiovascular Disease Risk Factors Among London Adults

Overview

The TOGETHER study analyzed cardiovascular disease (CVD) risk factor prevalence among ethnically diverse adults aged 30–90 years in London using primary care electronic health records. It revealed significant ethnic disparities in traditional CVD risk factors, highlighting the need for tailored prevention strategies in urban, multiethnic populations.

Background

Cardiovascular disease remains the leading cause of death and disability in the UK, accounting for over a quarter of all deaths annually and substantial healthcare costs. Premature CVD mortality disproportionately affects South Asian and Black ethnic groups. Previous UK studies on ethnic disparities in CVD risk factors are outdated or limited in diversity and geographic scope. The TOGETHER study aims to provide contemporary, comprehensive data on CVD risk factors across diverse ethnic groups in London to inform more equitable prevention efforts.

Data Highlights

The study included adults aged 30–90 years without established CVD who underwent cardiovascular risk assessment in London primary care from 2009 to 2020. Data extracted included demographics, smoking status, physician-reported diagnoses (obesity, diabetes, hypertension, dyslipidemia), anthropometric measurements, blood pressure, and lipid profiles. BMI was categorized per WHO criteria. The dataset was derived from standardized clinical coding in EMIS electronic health records across multiple GP practices.

Key Findings

• Significant ethnic differences exist in the prevalence of traditional CVD risk factors among London adults free from CVD.
• South Asian and Black ethnic groups experience higher rates of premature CVD mortality and greater burden of risk factors compared to White populations.
• Traditional risk factors measured in midlife do not fully explain ethnic disparities, suggesting earlier life exposures or gaps in detection and management.
• National NHS Health Check programs have low uptake and may not adequately address ethnic disparities in CVD prevention.
• Contemporary data from a highly diverse urban population are essential to tailor prevention strategies effectively.

Clinical Implications

Clinicians should recognize the persistent ethnic disparities in CVD risk factors and consider earlier and more targeted risk assessment in high-risk groups, particularly South Asian and Black populations. Population-level prevention programs may need adaptation to improve uptake and effectiveness in ethnically diverse urban settings. Enhanced detection and management strategies starting earlier in life could help reduce premature CVD mortality.

Conclusion

The TOGETHER study underscores the importance of contemporary, ethnically inclusive data to understand and address cardiovascular risk factor disparities in urban UK populations. Tailored prevention strategies are needed to achieve equitable cardiovascular health outcomes.

References

1. British Heart Foundation 2020 -- Cardiovascular Disease Statistics
2. NHS Health Check Programme -- National Prevention Strategy
3. TOGETHER Study Protocol -- Imperial College London