he COVID-19 pandemic has exposed racial and ethnic health disparities, inequities, and systemic racism in neurology. 1 Health disparities are negative differences in health that are associated with social, economic, and environmental disadvantages. Inequities are differences in access to or availability of facilities and services that are considered modifiable and associated with social disadvantage. Social determinants of health (SDOH) are conditions in which people are born, grow, live, work, and age that adversely affect health (Figure 1). 2 In many cases, SDOH are unevenly distributed and are shaped by the distribution of power, money, and resources (Figure 2). 2-4 Recently, the negative health impact of systematic racism in the US 5 has come to the forefront.Central nervous system immune-mediated diseases like multiple sclerosis (MS) and neuromyelitis optica spectrum disorder (NMOSD) start in early adulthood, carry a high risk of disability, and disproportionately affect Black 6,7 and Hispanic and Latinx 7 individuals. Myelin oligodendrocyte glycoprotein antibody (MOG-Ab)associated disease is a rare central nervous system inflammatory dis-order accounting for up to 42% of patients with NMOSD. 8 These conditions are expected to increase in Black and Hispanic and Latinx individuals as the US population grows. It is thus crucial to consider the disadvantages these populations face in achieving health equity. This review provides a contemporary synthesis of evidence examining health disparities, inequities, and SDOH in US Black and Hispanic and Latinx patients with MS, NMOSD, and MOG-Ab disorders.
MethodsWe searched PubMed, MEDLINE, and EMBASE with medical subject heading terms race OR ethnicity OR minorities OR African/ African American/Black OR Hispanic/Latin/Latin American/Latinx OR Asian AND disparities OR inequality OR inequity OR social determinants of health AND (1) multiple sclerosis OR (2) neuromyelitis optica spectrum disorder/neuromyelitis optica OR NMOSD/NMO (3) Myelin oligodendrocyte glycoprotein antibody OR MOG/ IMPORTANCE There is empirical evidence that social determinants of health (SDOH) impact health outcomes in Black and Hispanic and Latinx individuals in the US. Recently, SDOH have risen to the top as essential intervention targets that could help alleviate racial and ethnic disparities. Neuromyelitis optica spectrum disorder (NMOSD) disproportionately affects Black individuals, and multiple sclerosis (MS) has seen a recent shift in select racial groups. It is unclear to what degree SDOH have been investigated and contribute to racial and ethnic health disparities and inequities.OBSERVATIONS This narrative review provides a contemporary synthesis of SDOH associated with racial and ethnic health disparities and inequities in MS, NMOSD, and other autoimmune disorders, such as myelin oligodendrocyte glycoprotein antibody (MOG-Ab)-associated disease. These immune-mediated neurological diseases were chosen for their capacity to be a high burden to society and because of complementary SDOH-associa...