Health Disparities in Rheumatic Diseases: Understanding Global Challenges in Africa, Europe, Latin America, and Asia and Proposing Strategies for Improvement

Rheumatoid arthritis in Latin America: pharmacotherapy and clinical challenges

INTRODUCTION

Rheumatoid arthritis (RA) poses significant healthcare challenges in Latin America (LA) due to its high prevalence and unique healthcare dynamics. Despite global advancements, LA faces specific hurdles in effectively managing RA.

AREAS COVERED

This review examines RA epidemiology, treatment strategies, and clinical challenges in LA. RA prevalence varies, with higher rates among indigenous populations. While conventional disease-modifying antirheumatic drugs (csDMARDs) are recommended as first-line therapy, access remains inconsistent. Biologics and targeted synthetic DMARDs are available, but biosimilars have limited accessibility, with drug prices varying significantly. Key barriers include supply interruptions, diagnosis delays, and high non-adherence rates driven by socioeconomic factors. A severe shortage of rheumatologists, particularly in rural areas, affects patient care. Cardiovascular events, comorbidities, and endemic infections further complicate RA management.

EXPERT OPINION

Although RA care in LA has improved through better use of csDMARDs and advanced treatments, major challenges persist, such as a shortage of specialists, limited medical education, and fragmented healthcare systems. Expanding training programs, enhancing telemedicine, and ensuring drug supply continuity are essential. Strengthening clinical research, improving access to affordable treatments, and developing comprehensive, region-specific strategies are crucial to closing the gap between LA and more developed regions in RA care..

Addressing the research gap: access to care hinders genetic discovery in systemic lupus erythematosus patients throughout the African diaspora

Systemic lupus erythematosus (SLE) is a complex autoimmune condition that disproportionately impacts non-White ethnic and racial groups, particularly individuals in the African diaspora who experience heightened incidence, prevalence, and adverse outcomes. Genetic and epigenetic factors play significant roles in SLE risk, however these factors neither explain the whole of SLE risk nor the stark racial disparities we observe. Moreover, our understanding of genetic risk factors within African ancestry populations is limited due to social and environmental influences on research participation, disease presentation, and healthcare access. Globally, the African diaspora faces barriers in accessing essential SLE diagnostic tools, therapeutics, healthcare practitioners, and high-quality clinical and translational research studies. Here, we provide insights into the current state of genetic studies within African ancestry populations and highlight the unique challenges encountered in SLE care and research across countries of varying income levels. We also identify opportunities to address these disparities and promote scientific equity for individuals affected by SLE within the global African diaspora.

Burden of Other Musculoskeletal Disorders in Latin America and the Caribbean: Findings of Global Burden of Disease Study 2019

OBJECTIVE

To describe the results from the Global Burden Disease (GBD) study 2019 on the burden of other musculoskeletal (MSK) disorders in Latin America and the Caribbean (LAC).

METHODS

In this cross-sectional study, we analyzed data from all LAC region in the GBD study from 1990 to 2019. Other MSK (other than rheumatoid arthritis, osteoarthritis, gout, low back pain, and neck pain) burden was measured as prevalence, mortality, years lived with disability (YLD), and disability-adjusted life (DALY), by year, sex, and country. We show the counts, rates, and 95% uncertainty intervals (95% UI). Joinpoint regression analysis was used to estimate the average annual percentage change (AAPC) from 1990 to 2019. A correlational analysis between the burden parameters and sociodemographic index (SDI) was performed.

RESULTS

In 2019, there were 52.0 million (95% UI, 44.8-60.1 million) individuals with other MSK disorders in LAC. The age-standardized mortality rate in 2019 was 1.2 (95% UI, 0.8-1.6) per 100,000 inhabitants. The AAPC was estimated as 0.1% (95% confidence interval [CI], 0.1-0.2) and 0.2% (95% CI, 0.1-0.3) for prevalence and mortality rates, respectively. The age-standardized DALY rate was 685.4 (95% UI, 483.6-483.6) per 100,000 inhabitants, representing an AAPC of 0.2% (95% CI, 0.1-0.3). The burden was larger in women and the elderly. The SDI was positively correlated with the prevalence of YLD in 2019.

CONCLUSIONS

LAC region has experienced a significant burden of other MSK disorders over the last three decades. To challenge this growing burden, population-based strategies designed to reduce the burden of other MSK and strengthen health systems to contribute effective and cost-efficient care are necessary.

Health inequalities and social determinants of health: The role of syndemics in rheumatic disease

A syndemic is the co-existence of two or more health problems (including both social and biological features) that adversely influence each other with negative consequences on disease outcomes and perpetuation of inequalities. The syndemic approach can be applied to better understand the course of rheumatic musculoskeletal diseases (RMD) involving the study of adverse biological pathways and social determinants of health (SDH) all under the same framework. Identifying if a syndemic exists within RMDs may include investigating the synergic interactions between comorbidity (e.g., diabetes, obesity, chronic kidney diseases) and the concomitant of other adverse conditions (e.g., drug non-adherence, substance abuse), along with SDHs such as low household income, unemployment, low education, limited access to health care, as well as racial/ethnic discrimination. For decades, the understanding of RMDs progression has been based on causality, rather than investigating the kaleidoscopic web of connections that can potentially influence a disease course. The co-existence of health burdens in vulnerable populations, including those with RMD, specifically in certain socioeconomic groups, calls for new ways and strategies of thinking to improve our understanding of risk factors and co-morbidities to offer tailored interventions for clinical medicine and public health policy.

Global excellence in rheumatology: Africa-The contribution of African women rheumatologists

Over the last few decades, the development of Rheumatology on the African continent has made great strides. Alongside an increasing recognition of the prevalence and burden of disease from these conditions, has been a determination to raise awareness of these disorders in Africa together with an appreciation of the associated disease impact on individuals, families and society as a whole. Great improvements have also been made across the continent with regards to the education of medical students, trainee doctors and allied health professionals of these conditions. Furthermore, high quality rheumatological research is now emanating from Africa. Taken together, these actions mean that Africa is making a significant contribution to global excellence in Rheumatology. Although this achievement has been made possible by visionary, hardworking and inspirational men and women, we believe that it is vital to bring to light the extraordinary efforts of African female rheumatologists in this endeavor. Their contribution is all the more remarkable because of the barriers that women still face in medicine in general and in academia in particular. We showcase here, four women of distinction who in their own unique way, have exemplified the contribution of African female rheumatologists to global excellence in Africa. We pay tribute to them and to their ongoing efforts to act as beacons of excellence in rheumatology in Africa to men and especially to other women.

[18F]FDG PET/CT in rheumatoid arthritis

[¹⁸F]fluorodeoxyglucose (FDG) PET/CT can be used to image the inflammation in rheumatoid arthritis. Specifically, the synovial metabolic activity can be evaluated visually and measured using standard uptake values. Fluorine-18-labeled Sodium fluoride (NaF) PET/CT can be used to determine synovial osteoblastic activity. Response assessment using FDG PET/CT is routine in many cancers and this is now an emerging technique for rheumatoid arthritis. Vasculitis in rheumatoid arthritis (RA) can be also studied with FDG PET/CT and aortic calcification with NaF PET/CT. These techniques could be useful in determining RA disease severity. FDG PET/CT is a useful technique to exclude underlying malignancy when RA does not follow the expected course. A number of novel tracers are being studied with regard to their applicability in rheumatoid arthritis and some of these could even be used in a theranostic manner in the future.

Environmental and societal factors associated with COVID-19-related death in people with rheumatic disease: an observational study

Background

Differences in the distribution of individual-level clinical risk factors across regions do not fully explain the observed global disparities in COVID-19 outcomes. We aimed to investigate the associations between environmental and societal factors and country-level variations in mortality attributed to COVID-19 among people with rheumatic disease globally.

Methods

In this observational study, we derived individual-level data on adults (aged 18-99 years) with rheumatic disease and a confirmed status of their highest COVID-19 severity level from the COVID-19 Global Rheumatology Alliance (GRA) registry, collected between March 12, 2020, and Aug 27, 2021. Environmental and societal factors were obtained from publicly available sources. The primary endpoint was mortality attributed to COVID-19. We used a multivariable logistic regression to evaluate independent associations between environmental and societal factors and death, after controlling for individual-level risk factors. We used a series of nested mixed-effects models to establish whether environmental and societal factors sufficiently explained country-level variations in death.

Findings

14 044 patients from 23 countries were included in the analyses. 10 178 (72·5%) individuals were female and 3866 (27·5%) were male, with a mean age of 54·4 years (SD 15·6). Air pollution (odds ratio 1·10 per 10 μg/m3 [95% CI 1·01-1·17]; p=0·0105), proportion of the population aged 65 years or older (1·19 per 1% increase [1·10-1·30]; p<0·0001), and population mobility (1·03 per 1% increase in number of visits to grocery and pharmacy stores [1·02-1·05]; p<0·0001 and 1·02 per 1% increase in number of visits to workplaces [1·00-1·03]; p=0·032) were independently associated with higher odds of mortality. Number of hospital beds (0·94 per 1-unit increase per 1000 people [0·88-1·00]; p=0·046), human development index (0·65 per 0·1-unit increase [0·44-0·96]; p=0·032), government response stringency (0·83 per 10-unit increase in containment index [0·74-0·93]; p=0·0018), as well as follow-up time (0·78 per month [0·69-0·88]; p<0·0001) were independently associated with lower odds of mortality. These factors sufficiently explained country-level variations in death attributable to COVID-19 (intraclass correlation coefficient 1·2% [0·1-9·5]; p=0·14).

Interpretation

Our findings highlight the importance of environmental and societal factors as potential explanations of the observed regional disparities in COVID-19 outcomes among people with rheumatic disease and lay foundation for a new research agenda to address these disparities.

Funding

American College of Rheumatology and European Alliance of Associations for Rheumatology.

Health disparities in systemic lupus erythematosus-a narrative review

PURPOSE OF REVIEW

To describe root causes of health disparities by reviewing studies on incidence and outcomes of systemic lupus erythematosus (SLE) related to ethnic, race, gender, or socioeconomic differences and to propose solutions.

RECENT FINDINGS

SLE outcomes have steadily improved over the past 40 years but are not uniformly distributed across various racial and ethnic groups. Belonging to racial and ethnic minority has been cited as a risk factor for more severe disease and poor outcome in SLE. Population-based registries have demonstrated that Black patients with SLE have significantly lower life expectancy compared to White patients. Lower socioeconomic status has been shown to be one of the strongest predictors of progression to end stage renal disease in lupus nephritis. An association between patient experiences of racial discrimination, increased SLE activity, and damage has also been described. The lack of representation of marginalized communities in lupus clinical trials further perpetuates these disparities. To that end, the goal of a rheumatology workforce that resembles the patients it treats has emerged as one of many solutions to current shortfalls in care. Disparities in SLE incidence, treatment, and outcomes have now been well established. The root causes of these disparities are multifactorial including genetic, epigenetic, and socioeconomic. The underrepresentation of marginalized communities in lupus clinical trials further worsen these disparities. Efforts have been made recently to address disparities in a more comprehensive manner, but systemic causes of disparities must be acknowledged and political will is required for a sustained positive change.

A glimpse into the future of systemic lupus erythematosus

This viewpoint article on a forecast of clinically meaningful changes in the management of systemic lupus erythematosus (SLE) in the next 10 years is based on a review of the current state of the art. The groundwork has been laid by a robust series of classification criteria and treatment recommendations that have all been published since 2019. Building on this strong foundation, SLE management predictably will take significant steps forward. Assessment for lupus arthritis will presumably include musculoskeletal sonography. Large-scale polyomics studies are likely to unravel more of the central immune mechanisms of the disease. Biomarkers predictive of therapeutic success may enter the field; the type I interferon signature, as a companion for use of anifrolumab, an antibody against the common type I interferon receptor, is one serious candidate. Besides anifrolumab for nonrenal SLE and the new calcineurin inhibitor voclosporin in lupus nephritis, both of which are already approved in the United States and likely to become available in the European Union in 2022, several other approaches are in advanced clinical trials. These include advanced B cell depletion, inhibition of costimulation via CD40 and CD40 ligand (CD40L), and Janus kinase 1 (Jak1) and Tyrosine kinase 2 (Tyk2) inhibition. At the same time, essentially all of our conventional therapeutic armamentarium will continue to be used. The ability of patients to have successful SLE pregnancies, which has become much better in the last decades, should further improve, with approaches including tumor necrosis factor blockade and self-monitoring of fetal heart rates. While we hope that the COVID-19 pandemic will soon be controlled, it has highlighted the risk of severe viral infections in SLE, with increased risk tied to certain therapies. Although there are some data that a cure might be achievable, this likely will remain a challenge beyond 10 years from now.