Lifting Universal Masking in Schools - Covid-19 Incidence among Students and Staff.

BACKGROUND: In February 2022, Massachusetts rescinded a statewide universal masking policy in public schools, and many Massachusetts school districts lifted masking requirements during the subsequent weeks. In the greater Boston area, only two school districts - the Boston and neighboring Chelsea districts - sustained masking requirements through June 2022. The staggered lifting of masking requirements provided an opportunity to examine the effect of universal masking policies on the incidence of coronavirus disease 2019 (Covid-19) in schools. METHODS: We used a difference-in-differences analysis for staggered policy implementation to compare the incidence of Covid-19 among students and staff in school districts in the greater Boston area that lifted masking requirements with the incidence in districts that sustained masking requirements during the 2021-2022 school year. Characteristics of the school districts were also compared. RESULTS: Before the statewide masking policy was rescinded, trends in the incidence of Covid-19 were similar across school districts. During the 15 weeks after the statewide masking policy was rescinded, the lifting of masking requirements was associated with an additional 44.9 cases per 1000 students and staff (95% confidence interval, 32.6 to 57.1), which corresponded to an estimated 11,901 cases and to 29.4% of the cases in all districts during that time. Districts that chose to sustain masking requirements longer tended to have school buildings that were older and in worse condition and to have more students per classroom than districts that chose to lift masking requirements earlier. In addition, these districts had higher percentages of low-income students, students with disabilities, and students who were English-language learners, as well as higher percentages of Black and Latinx students and staff. Our results support universal masking as an important strategy for reducing Covid-19 incidence in schools and loss of in-person school days. As such, we believe that universal masking may be especially useful for mitigating effects of structural racism in schools, including potential deepening of educational inequities. CONCLUSIONS: Among school districts in the greater Boston area, the lifting of masking requirements was associated with an additional 44.9 Covid-19 cases per 1000 students and staff during the 15 weeks after the statewide masking policy was rescinded.

Inequities in COVID-19 vaccine and booster coverage across Massachusetts ZIP codes after the emergence of Omicron: A population-based cross-sectional study.

BACKGROUND: Inequities in Coronavirus Disease 2019 (COVID-19) vaccine and booster coverage may contribute to future disparities in morbidity and mortality within and between Massachusetts (MA) communities. METHODS AND FINDINGS: We conducted a population-based cross-sectional study of primary series vaccination and booster coverage 18 months into the general population vaccine rollout. We obtained public-use data on residents vaccinated and boosted by ZIP code (and by age group: 5 to 19, 20 to 39, 40 to 64, 65+) from MA Department of Public Health, as of October 10, 2022. We constructed population denominators for postal ZIP codes by aggregating census tract population estimates from the 2015-2019 American Community Survey. We excluded nonresidential ZIP codes and the smallest ZIP codes containing 1% of the state's population. We mapped variation in ZIP code-level primary series vaccine and booster coverage and used regression models to evaluate the association of these measures with ZIP code-level socioeconomic and demographic characteristics. Because age is strongly associated with COVID-19 severity and vaccine access/uptake, we assessed whether observed socioeconomic and racial/ethnic inequities persisted after adjusting for age composition and plotted age-specific vaccine and booster coverage by deciles of ZIP code characteristics. We analyzed data on 418 ZIP codes. We observed wide geographic variation in primary series vaccination and booster rates, with marked inequities by ZIP code-level education, median household income, essential worker share, and racial/ethnic composition. In age-stratified analyses, primary series vaccine coverage was very high among the elderly. However, we found large inequities in vaccination rates among younger adults and children, and very large inequities in booster rates for all age groups. In multivariable regression models, each 10 percentage point increase in "percent college educated" was associated with a 5.1 (95% confidence interval (CI) 3.9 to 6.3, p < 0.001) percentage point increase in primary series vaccine coverage and a 5.4 (95% CI 4.5 to 6.4, p < 0.001) percentage point increase in booster coverage. Although ZIP codes with higher "percent Black/Latino/Indigenous" and higher "percent essential workers" had lower vaccine coverage (-0.8, 95% CI -1.3 to -0.3, p < 0.01; -5.5, 95% CI -7.3 to -3.8, p < 0.001), these associations became strongly positive after adjusting for age and education (1.9, 95% CI 1.0 to 2.8, p < 0.001; 4.8, 95% CI 2.6 to 7.1, p < 0.001), consistent with high demand for vaccines among Black/Latino/Indigenous and essential worker populations within age and education groups. Strong positive associations between "median household income" and vaccination were attenuated after adjusting for age. Limitations of the study include imprecision of the estimated population denominators, lack of individual-level sociodemographic data, and potential for residential ZIP code misreporting in vaccination data. CONCLUSIONS: Eighteen months into MA's general population vaccine rollout, there remained large inequities in COVID-19 primary series vaccine and booster coverage across MA ZIP codes, particularly among younger age groups. Disparities in vaccination coverage by racial/ethnic composition were statistically explained by differences in age and education levels, which may mediate the effects of structural racism on vaccine uptake. Efforts to increase booster coverage are needed to limit future socioeconomic and racial/ethnic disparities in COVID-19 morbidity and mortality.

Need for open data on COVID-19 vaccine uptake among pregnant people in the Caribbean: a call to action.

Pregnant people with coronavirus disease 2019 (COVID-19) have a higher risk of adverse maternal and fetal outcomes compared with pregnant people without COVID-19. In 2021, large increases in maternal mortality were reported in Jamaica, almost half of which were attributable to COVID-19. COVID-19 vaccination has been shown to reduce these risks, but low- and middle-income countries lack free, publicly available data, known as open data, on COVID-19 vaccine uptake for their pregnant populations. The objectives of this paper were to: review how high-income countries use open data to detect trends in COVID-19 vaccine uptake among pregnant people and develop vaccination distribution strategies; outline barriers to making open data available for maternal COVID-19 vaccination in the Caribbean; and propose a multipronged strategy that would increase the availability of open data on maternal COVID-19 vaccination in the Caribbean. A multipronged strategy to fill the data void would involve: (i) utilizing existing Caribbean maternal immunization data collection entities; (ii) adapting digital software tools to establish maternal electronic immunization registries; and (iii) collaborating with local partners skilled in data analytics. Making open data available for COVID-19 vaccine uptake among pregnant people in the Caribbean could offer substantial benefits, including the development of measurable maternal COVID-19 vaccination goals and the facilitation of vaccine decision-making discussions between providers and pregnant people.

Las embarazadas con la enfermedad por coronavirus del 2019 (COVID-19) tienen un mayor riesgo de resultados maternos y fetales adversos que aquellas libres de la enfermedad. En el 2021, en Jamaica se notificó un gran aumento de la mortalidad materna, del cual casi la mitad fue atribuible a la COVID-19. Se ha demostrado que la vacunación contra la COVID-19 reduce tales riesgos, pero los países de ingresos bajos y medianos carecen de datos gratuitos y de carácter público, conocidos como datos abiertos, sobre la aceptación de la vacuna contra la COVID-19 por parte de las mujeres durante el embarazo. Los objetivos del presente artículo consistieron en examinar cómo los países de ingresos altos utilizan los datos abiertos para detectar las tendencias de aceptación de la vacuna contra la COVID-19 entre las mujeres durante el embarazo y formular estrategias de distribución de las vacunas; señalar los obstáculos que dificultan la disponibilidad de los datos abiertos sobre la vacunación materna contra la COVID-19 en el Caribe; y proponer una estrategia múltiple que permita aumentar la disponibilidad de datos abiertos sobre la vacunación materna contra la COVID-19 en el Caribe. Una estrategia múltiple para llenar este vacío de información implicaría: a) utilizar las entidades de recopilación de datos sobre inmunización materna ya existentes en el Caribe; b) adaptar las herramientas informáticas digitales para crear registros electrónicos de vacunación materna; y c) colaborar con asociados locales especializados en el análisis de datos. Facilitar el acceso a los datos abiertos sobre la aceptación de la vacuna contra la COVID-19 entre las mujeres durante el embarazo en el Caribe podría ofrecer beneficios considerables, tales como el establecimiento de objetivos cuantificables en materia de vacunación materna contra la COVID-19, y propiciar las deliberaciones sobre la toma de decisiones en materia de vacunación entre los prestadores de atención de salud y las embarazadas.

Gestantes com a doença pelo coronavírus 2019 (COVID-19) têm maior risco de desfechos maternos e fetais adversos em comparação com gestantes sem COVID-19. Em 2021, foi registrado um aumento acentuado da mortalidade materna na Jamaica, e quase metade era atribuível à COVID-19. Foi demonstrado que a vacinação contra a COVID-19 reduz esses riscos, mas os países de baixa e média renda não dispõem de dados gratuitos e publicamente disponíveis (os chamados dados abertos) sobre a adesão à vacina contra a COVID-19 entre gestantes. Os objetivos deste estudo foram: analisar como os países de alta renda usam dados abertos para detectar tendências na adesão à vacina contra a COVID-19 entre gestantes e desenvolver estratégias de distribuição da vacina; descrever os obstáculos para disponibilizar dados abertos sobre a vacinação materna contra a COVID-19 no Caribe; e propor uma estratégia multifacetada que aumente a disponibilidade de dados abertos sobre a vacinação materna contra a COVID-19 no Caribe. Uma estratégia multifacetada para obter dados a fim de preencher essa lacuna envolveria: (i) utilização das entidades existentes que coletam dados de imunização materna no Caribe; (ii) adaptação de ferramentas de software para estabelecer registros eletrônicos de imunização materna; e (iii) colaboração com parceiros locais especializados em análise de dados. A disponibilização de dados abertos sobre a adesão de gestantes à vacinação contra a COVID-19 no Caribe poderia oferecer benefícios substanciais, incluindo o desenvolvimento de metas mensuráveis de vacinação materna contra a COVID-19, e facilitar discussões entre profissionais de saúde e gestantes para a tomada de decisões sobre vacinas.

Rural-Urban Differences in Influenza Vaccination Among Adults in the United States, 2018-2019.

Objectives. To provide adjusted rates of self-reported receipt of the influenza vaccine in the 2018-2019 flu season among adults in large metropolitan, medium and small metropolitan, and nonmetropolitan areas of the United States by age group, gender, and race. Methods. We queried the 2019 National Health Interview Survey for respondents aged 18 years and older. To provide national estimates of influenza vaccination coverage, we performed sample-weighted multivariable logistic regressions and predicted marginal modeling while adjusting for age, gender, race/ethnicity, and urban-rural household designation. Results. After weighting, 48.1%, 46.2%, and 43.6% of adults from large metropolitan, small and medium metropolitan, and nonmetropolitan areas, respectively, received the influenza vaccine. Additionally, there was a trend toward declining influenza vaccination status from large metropolitan to rural areas in all age groups, both genders, and multiple racial/ethnic groups. Conclusions. Self-reported influenza vaccination rates were lower in rural than in urban areas among adults of all age groups and both genders. Using community leaders for health promotion, augmentation of the community health care workforce, and provision of incentives for providers to integrate influenza vaccination in regular visits may expand influenza vaccine coverage. (Am J Public Health. 2022;112(2):304-307. https://doi.org/10.2105/AJPH.2021.306575).

Neighborhood Social Cohesion and Inequalities in COVID-19 Diagnosis Rates by Area-Level Black/African American Racial Composition.

Geographic inequalities in COVID-19 diagnosis are now well documented. However, we do not sufficiently know whether inequalities are related to social characteristics of communities, such as collective engagement. We tested whether neighborhood social cohesion is associated with inequalities in COVID-19 diagnosis rate and the extent the association varies across neighborhood racial composition. We calculated COVID-19 diagnosis rates in Philadelphia, PA, per 10,000 general population across 46 ZIP codes, as of April 2020. Social cohesion measures were from the Southeastern Pennsylvania Household Health Survey, 2018. We estimated Poisson regressions to quantify associations between social cohesion and COVID-19 diagnosis rate, testing a multiplicative interaction with Black racial composition in the neighborhood, which we operationalize via a binary indicator of ZIP codes above vs. below the city-wide average (41%) Black population. Two social cohesion indicators were significantly associated with COVID-19 diagnosis. Associations varied across Black neighborhood racial composition (p <0.05 for the interaction test). In ZIP codes with ≥41% of Black people, higher collective engagement was associated with an 18% higher COVID-19 diagnosis rate (IRR=1.18, 95%CI=1.11, 1.26). In contrast, areas with <41% of Black people, higher engagement was associated with a 26% lower diagnosis rate (IRR=0.74, 95%CI=0.67, 0.82). Neighborhood social cohesion is associated with both higher and lower COVID-19 diagnosis rates, and the extent of associations varies across Black neighborhood racial composition. We recommend some strategies for reducing inequalities based on the segmentation model within the social cohesion and public health intervention framework.

The transient effect of a peer support intervention to improve adherence among adolescents and young adults failing antiretroviral therapy in Harare, Zimbabwe: a randomized control trial.

BACKGROUND: Adolescents and young adults living with HIV in sub Saharan Africa are at high risk of poor adherence to antiretroviral therapy (ART) and virologic failure (VF). METHODS: We conducted a randomized control trial among adolescents and young adults on ART with VF to assess the effectiveness of a community-based peer support intervention aimed at improving VF. Viral load (VL) levels were obtained at 12, 24 and 36 weeks. A subset of the participants had baseline HIV drug resistance (HIVDR) genotyped using Sanger sequencing. RESULTS: The participants' median (interquartile range (IQR)) age was 18.1 (IQR: 15.1-20.0) years and half (50.5%, n = 107) were male. At week 24, the proportion of subjects with a detectable viremia was significantly lower in the intervention arm than in the standard of care (SOC) arm (76.0% (n = 79) vs. 89.0% (n = 96), p = 0.013). At Week 36, there remained a difference in the proportion of subjects with a detectable VL between the intervention arm (68.3%, n = 71) and SOC arm (79.6%, n = 86), which was trending towards statistical significance (p = 0.059). There was no difference in the probability of having a detectable VL over time between the intervention and SOC groups (adjusted odds ratio: 1.14, p = 0.439). Baseline HIVDR was observed in 44.0% of the participants in the intervention and 56.0% in the SOC group (p = 0.146). CONCLUSION: A transient effect of the peer support intervention in improving VF was observed among adolescents and young people failing ART. TRIAL REGISTRATION: This study is registered with www.clinicaltrials.gov under the reference number: NCT02833441.

HIV-Related Medical Mistrust, HIV Testing, and HIV Risk in the National Survey on HIV in the Black Community.

Black Americans are greatly affected by HIV disparities and exhibit high levels of medical mistrust, including HIV conspiracy beliefs, a form of mistrust around HIV's origin and treatment. A 2002-2003 national survey of Black Americans found that 48% believed that "HIV is a manmade virus." However, the extent to which such beliefs remain widespread is unknown. Moreover, HIV conspiracy beliefs have been associated with greater HIV risk, but have also been associated with a higher testing likelihood-and no research to date has attempted to explain these seemingly contradictory findings. We obtained updated data on prevalence and correlates of HIV conspiracy beliefs from the US National Survey on HIV in the Black Community, a nationally representative e-mail survey of 868 Black individuals aged 18-50 years (February-April 2016). Substantial percentages agreed that HIV is man-made (31%) and that the government is withholding a cure for HIV (40%). HIV conspiracy beliefs and HIV risk were both significantly associated with a higher HIV testing likelihood. The association between HIV conspiracy beliefs and HIV testing was significantly mediated by individual-level HIV risk (73% of total effect), but not by area-level socioeconomic position (an ecological determinant of higher HIV prevalence). Mistrust remains high among Black Americans, but the association of mistrust with prevention behaviors is complex. People who do not trust the public health system may also be at greater risk-and thus, more likely to get tested, potentially due to greater access to community-based testing venues that engage higher risk populations.

Facilitators and Barriers to Pre-Exposure Prophylaxis (PrEP) Use Among Black Individuals in the United States: Results from the National Survey on HIV in the Black Community (NSHBC).

This study explores willingness to use PrEP among Black individuals in the US. From February to April 2016, an online survey was administered to a nationally representative sample of Black individuals. 855 individuals who were HIV negative by self-report participated [mean age: 33.6 (SD 9.2); 45.5% male]. Among all respondents, 14.5% were aware of, and 26.0% would be willing to use PrEP. Among high-risk individuals (N = 327), 19.8% knew about and 35.1% would be willing to use PrEP. The most common reason for lack of willingness among high-risk individuals was low self-perceived risk (65.1%). In multivariate analysis, individuals reporting single marital status [OR 1.8 (1.2, 2.5), p = 0.002], depressive symptoms [OR 1.6 (1.2, 2.2), p = 0.0054], arrest history [OR 1.7(1.2, 2.4), p = 0.0003], PrEP knowledge [OR 1.5 (1.0, 2.3), p = 0.0247] and belief in HIV conspiracies [OR 1.3 (1.1, 1.5), p = 0.0075] were more willing to use PrEP. Participants who saw a health care provider less frequently were less willing to use PrEP [OR 0.5 (0.4, 0.8), p = 0.0044]. Among a nationally representative sample of Black individuals, few high risk individuals were willing to use PrEP. Interventions to increase risk awareness, PrEP knowledge and access to care are necessary to improve PrEP uptake.

Faith leaders' messaging is essential to enhance HIV prevention among black Americans: results from the 2016 National Survey on HIV in the black community (NSHBC).

BACKGROUND: To investigate whether religious service attendance and faith leaders' messages about HIV and same-sex relationships are associated with acceptance of HIV prevention strategies. METHODS: Multivariable Poisson regression assessed whether attending religious services, faith leaders' messages about HIV and same-sex relationships, and supportiveness of those messages were associated with HIV testing, as well as knowledge of and willingness to use pre-exposure prophylaxis (PrEP) among 868 Black Americans [45% men; M (SD) = 34 (9) years-old] in the 2016 National Survey on HIV in the Black Community, USA. RESULTS: Participants who reported attending services monthly and/or hearing faith leaders' messages that were supportive of same-sex relationships had a significantly higher likelihood of willingness to use PrEP (adjusted Rate Ratio[ARR] = 1.76; 95% confidence interval [CI] = 1.09, 2.48) and aRR = 2.19; 95% CI = 1.35, 3.55, respectively), independent of HIV risk. Homophobia was significantly associated with higher likelihood of being aware of PrEP and testing for HIV testing in the past 12 months. CONCLUSIONS: Faith leaders' messaging can influence Black Americans' perceptions and uptake of HIV prevention strategies. Faith institutions and faith leaders should be involved in designing and disseminating HIV prevention strategies.

Non-communicable diseases and HIV care and treatment: models of integrated service delivery.

OBJECTIVES: Non-communicable diseases (NCD) are a growing cause of morbidity in low-income countries including in people living with human immunodeficiency virus (HIV). Integration of NCD and HIV services can build upon experience with chronic care models from HIV programmes. We describe models of NCD and HIV integration, challenges and lessons learned. METHODS: A literature review of published articles on integrated NCD and HIV programs in low-income countries and key informant interviews were conducted with leaders of identified integrated NCD and HIV programs. Information was synthesised to identify models of NCD and HIV service delivery integration. RESULTS: Three models of integration were identified as follows: NCD services integrated into centres originally providing HIV care; HIV care integrated into primary health care (PHC) already offering NCD services; and simultaneous introduction of integrated HIV and NCD services. Major challenges identified included NCD supply chain, human resources, referral systems, patient education, stigma, patient records and monitoring and evaluation. The range of HIV and NCD services varied widely within and across models. CONCLUSIONS: Regardless of model of integration, leveraging experience from HIV care models and adapting existing systems and tools is a feasible method to provide efficient care and treatment for the growing numbers of patients with NCDs. Operational research should be conducted to further study how successful models of HIV and NCD integration can be expanded in scope and scaled-up by managers and policymakers seeking to address all the chronic care needs of their patients.

Interdisciplinary HIV care in a changing healthcare environment in the USA.

HIV remains a complex disease that requires comprehensive, coordinated care to ensure optimal outcomes. In the USA, interdisciplinary models of care have developed over time to optimize treatment outcomes. These models may be increasingly important in an era of healthcare reform in the USA. A qualitative study of nine clinical sites funded by the Ryan White HIV/AIDS Program (RWHAP), the federally funded "safety net" program for uninsured and underinsured people living with HIV, was undertaken to identify components of successful models of interdisciplinary HIV care. Findings suggest that these include: (1) patient-centered, one-stop-shop approaches with integrated or co-located services; (2) diverse teams of clinical and nonclinical providers; (3) a site culture that promotes a stigma reducing environment for clients; (4) the availability of a comprehensive array of medical, behavioral health, and psychosocial services; (5) effective communication strategies, including electronic health records (EHRs); and (6) a focus on quality. The importance of RWHAP funding in sustaining these programs is highlighted.

The Community As A Full Partner: A New Model For Public Health.

The COVID-19 pandemic demonstrated a need to strengthen the US public health system by shifting toward much greater community engagement and leadership. In November and December 2023, we conducted separate online surveys of community-based organizations and large metropolitan health departments to identify barriers and opportunities for building a public health system with strong community partnerships. Identified barriers included mistrust, siloed health departments with structural challenges in funding community-based organizations, and insufficient shared decision making. The surveys helped inform our six policy recommendations: establish state and local community councils to formalize the roles of community-based organizations in public health decision making; dedicate funding to these organizations; offer funding that is not limited to a specific disease or condition; simplify procurement and reporting processes directed to community-based organizations; create a training and technical assistance program for these organizations; and increase public health worker diversity, including sustainable funding for community health workers.

Correlates of Homonegativity Towards Men Who Have Sex With Men Among Black Individuals in the United States.

This study aims to identify the factors that are associated with homonegativity toward men who have sex with men (MSM) within Black communities since the expansion of LGBTQ rights. A survey was completed in 2016 by a nationally representative sample of 868 Black respondents, 18-50 years old, via e-mail. Demographics, perception of same-gender sexual behaviors, religiosity, experienced racism, and contact with the carceral system (CS) were assessed. 61.6% of respondents endorsed at least one homonegative belief. Being male, residing in the South, attending religious services, receiving homonegative faith messaging, and having contact with the CS were significantly associated with homonegativity toward MSM while experiencing racism, older age, and residing in a non-metropolitan area were not. Education efforts on LGBTQ identities in Black communities should engage faith communities, extend to metropolitan and non-metropolitan areas of the South, and include younger and older adults. Programs that decrease the arrest of Black individuals may also help reduce homonegativity toward MSM.

Factors Associated With Coronavirus Disease 2019 Vaccine Uptake Among Pregnant Women and Nonpregnant Women of Reproductive Age in Jamaica.

Background: Despite high rates of coronavirus disease 2019 (COVID-19)-related maternal mortality, Jamaica currently has little data on COVID-19 vaccine uptake among pregnant women. Methods: We conducted a cross-sectional, web-based survey of 192 reproductive-aged women in Jamaica from February 1 to 8, 2022. Participants were recruited from a convenience sample of patients, providers, and staff at a teaching hospital. We assessed self-reported COVID-19 vaccination status and COVID-19-related medical mistrust (operationalized as vaccine confidence, government mistrust, and race-based mistrust). We used multivariable modified Poisson regression to test the association between vaccine uptake and pregnancy. Results: Of 192 respondents, 72 (38%) were pregnant. Most (93%) were Black. Vaccine uptake was 35% in pregnant women versus 75% in nonpregnant women. Pregnant women were more likely to cite healthcare providers versus the government as trustworthy sources of COVID-19 vaccine information (65% vs 28%). Pregnancy, low vaccine confidence, and government mistrust were associated with a lower likelihood of COVID-19 vaccination (adjusted prevalence ratio [aPR] = 0.68 [95% confidence interval {CI}, .49-.95], aPR = 0.61 [95% CI, .40-.95], and aPR = 0.68 [95% CI, .52-.89], respectively). Race-based mistrust was not associated with COVID-19 vaccination in the final model. Conclusions: Pregnancy, low vaccine confidence, and government mistrust were associated with a lower likelihood of COVID-19 vaccination among reproductive-aged women in Jamaica. Future studies should evaluate the efficacy of strategies proven to improve maternal vaccination coverage, including standing "opt-out" vaccination orders and collaborative provider and patient-led educational videos tailored for pregnant individuals. Strategies that decouple vaccine messaging from government agencies also warrant evaluation.

Racial Disparities in Periprosthetic Joint Infections after Primary Total Joint Arthroplasty: A Retrospective Study.

In the United States, racial disparities have been observed in complications following total joint arthroplasty (TJA), including readmissions and mortality. It is unclear whether such disparities also exist for periprosthetic joint infection (PJI). The clinical data registry of a large New England hospital system was used to identify patients who underwent TJA between January 2018 and December 2021. The comorbidities were evaluated using the Elixhauser Comorbidity Index (ECI). We used Poisson regression to assess the relationship between PJI and race by estimating cumulative incidence ratios (cIRs) and 95% confidence intervals (CIs). We adjusted for age and sex and examined whether ECI was a mediator using structural equation modeling. The final analytic dataset included 10,018 TJAs in 9681 individuals [mean age (SD) 69 (10)]. The majority (96.5%) of the TJAs were performed in non-Hispanic (NH) White individuals. The incidence of PJI was higher among NH Black individuals (3.1%) compared with NH White individuals (1.6%) [adjusted cIR = 2.12, 95%CI = 1.16-3.89; p = 0.015]. Comorbidities significantly mediated the association between race and PJI, accounting for 26% of the total effect of race on PJI incidence. Interventions that increase access to high-quality treatments for comorbidities before and after TJA may reduce racial disparities in PJI.