Racial/Ethnic, Nativity, and Sociodemographic Disparities in Maternal Hypertension in the United States, 2014-2015

Evaluation of a Question Prompt List About Cardiovascular Disease Risk and Prevention After Hypertensive Pregnancy: A Pilot Study

INTRODUCTION

The aim of this study was to pilot test a question prompt list (QPL) about cardiovascular disease (CVD) risk reduction after hypertensive pregnancy (HDP).

METHODS

In a prospective cohort study of adult women who had HDP given the QPL before and surveyed after a physician visit, we assessed perceived person-centred care, self-efficacy for self-management, perceived self-management and QPL feasibility.

RESULTS

Twenty-three women participated: 57% of diverse ethno-cultural groups, 65% < 40 years of age and 48% immigrants. Most scored high for person-centred care (mean 4.1 ± 0.2/5); and moderately for self-efficacy (mean 7.4 ± 0.6/10) and self-management (mean 3.1 ± 0.3/5). Most appreciated QPL design and reported QPL benefits: helped them to prepare for the visit and know what to ask; increased confidence to ask questions, knowledge of the link between HDP and CVD and lifestyle behaviours to reduce CVD risk. Most reported that physicians were receptive to discussing QPL questions.

CONCLUSION

Women appreciated the QPL and knowledge about self-management was high but self-efficacy for or perceived self-management was moderate. It appears feasible to share a QPL with ethno-culturally diverse women who can share it with physicians to facilitate discussions about post-pregnancy HDP-related CVD risk.

PATIENT OR PUBLIC CONTRIBUTION

This study involved women who experienced HDP and engaged ethno-culturally diverse women with lived experience of HDP as study advisors in all stages of the research.

Developing a question prompt tool to prevent and manage early cardiovascular disease after hypertensive pregnancy: qualitative interviews with women and clinicians

BACKGROUND

Persons (henceforth, women) who have hypertensive disorders of pregnancy (HDP) are at risk of premature cardiovascular disease (CVD). While largely preventable through lifestyle management, many women and clinicians are unaware of the risk. Based on prior research, we developed a question prompt tool (QPT) on preventing and managing CVD after HDP. The purpose of this study was to refine QPT design.

METHODS

We recruited Canadian women who had HDP and clinicians who might care for them using multiple strategies, conducted telephone interviews with consenting participants, and used qualitative description and inductive content analysis to derive themes.

RESULTS

We interviewed 21 women who varied in HDP type, CVD status, years since HDP pregnancy, age, geography and ethno-cultural group; and 21 clinicians who varied in specialty (midwife, nurse practitioner, family physician, internist, obstetrician, cardiologist), geography and years in practice. Participating women and clinicians agreed on needed improvements: more instructions, lay and gender-neutral language, links to additional information, more space for answers, graphic appeal, and both print and electronic format. Both groups identified similar barriers: clinicians lack time/willingness, and low language/health literacy and access to technology among women; enablers: translated, credible source/endorser, culturally relevant, organized by health trajectory stages; and likely benefits: raise awareness, empower women, encourage them to adopt healthy lifestyle. Women desired exposure to the QPT before or during pregnancy, while clinicians recommended waiting until postpartum to avoid overwhelming women. Similarly, most women said the QPT should be available through multiple avenues to empower them for health self-advocacy, while clinicians thought they should introduce the QPT to women, and decide when and which questions to address. To mitigate reluctance, clinicians recommended self-directed educational materials accompany the QPT.

CONCLUSIONS

We will use this information to refine QPT design and plan for future evaluation. If found to be effective and widely disseminated, the QPT could improve awareness and communication about this issue, and may reduce CVD risk in many women who have hypertensive pregnancies. Ongoing research is needed to more fully understand how QPTs support patient-clinician communication, and how to alert and prime both patients and clinicians to use QPTs.

Trends in the Incidence of Hypertensive Disorders of Pregnancy Among the Medicaid Population before and During COVID-19

Importance

Hypertensive disorders of pregnancy (HDP) are a group of high blood pressure disorders during pregnancy that are a leading cause of maternal and infant morbidity and mortality. Data on the trend in the incidence of HDP among the Medicaid population during coronavirus disease of 2019 (COVID-19) are lacking.

Objective

To determine the trends in the annual incidence of HDP among pregnant Medicaid-insured women in Louisiana before and during the COVID-19 pandemic (2016-2021).

Methods

A total of 113,776 pregnant women aged 15-50 years were included in this study. For multiparous individuals, only the first pregnancy was used in the analyses. Women with a diagnosis of each type-specific HDP were identified by using the International Classification of Diseases, 10th revision (ICD-10) codes. The annual incidence of HDP was calculated for each race and age subgroup. For each type-specific HDP, the annual age-specific incidence was calculated.

Results

The incidence of HDP increased from 10.5% in 2016 to 17.7% in 2021. The highest race/ethnicity-specific incidence of HDP was seen in African American women (19.2%), then White women (13.1%), followed by other women (10.7%).

Conclusion and Relevance

HDP remains a very prevalent and significant global health issue, especially in African American women and during the COVID-19 pandemic. Severe HDP substantially increases the risk of mortality in offspring and poses long-term issues for both mother and infant. HDP prevention holds particular relevance for the Medicaid population, given the health care disparities and barriers that impact quality of care, leading to an increased risk for HDP.

Prevalence of Hypertensive Disorders of Pregnancy and Gestational Diabetes Mellitus by Race and Ethnicity in Illinois, 2018 to 2020

PURPOSE

Use administrative discharge data from 2018 to 2020 to determine if there are differences in the prevalence of hypertensive disorders of pregnancy (HDP) and gestational diabetes mellitus (GDM) by race and ethnicity in Illinois.

STUDY DESIGN AND METHODS

This retrospective cross-sectional study used administrative discharge records from all patients who had live births in Illinois over a 3-year period; 2018, 2019, 2020. Multivariate analyses were performed to control for covariates and determine if associations vary by race and ethnicity for HDP and GDM.

RESULTS

A total of 287,250 discharge records were included. Multivariate analyses showed that after adjusting for covariates, non-Hispanic Black women had 1.60 increased odds of HDP compared to non-Hispanic White women (OR, 1.60; 95% CI, 1.55-1.65). Hispanic women (OR, 1.45; 95% CI, 1.40-1.50), Asian/Pacific Islander women (OR, 2.07; 95% CI, 1.97-2.17), and American Indian/Alaska Native women (OR, 1.43; 95% CI, 1.17-1.74) had an increased odds of GDM compared to non-Hispanic White women.

CLINICAL IMPLICATIONS

Women of color were at increased odds for HDP and GDM in Illinois. To eliminate poor maternal outcomes in women of color at risk for HDP and GDM, more culturally congruent health equity practices, policies, and comprehensive care interventions must be adopted.

Severe Maternal Morbidity among Low-Income Patients with Hypertensive Disorders of Pregnancy

OBJECTIVE

Hypertensive disorders of pregnancy (HDP) contribute significantly to the development of severe maternal morbidities (SMM), particularly among low-income women. The purpose of the study was to explore the relationship between maternal characteristics and SMM, and to investigate if differences in SMM exist among patients with HDP diagnosis.

STUDY DESIGN

This study utilized 2017 Alabama Medicaid administrative claims. SMM diagnoses were captured using the Centers for Disease Control and Prevention's classification by International Classification of Diseases codes. Maternal characteristics and frequencies were compared using Chi-square and Cramer's V statistics. Logistic regression analyses were conducted to examine multivariable relationships between maternal characteristics and SMM among patients with HDP diagnosis. Odds ratios and 95% confidence intervals (CIs) were used to estimate risk.

RESULTS

A higher proportion of patients experiencing SMM were >34 years old, Black, Medicaid for Low-Income Families eligible, lived in a county with greater Medicaid enrollment, and entered prenatal care (PNC) in the first trimester compared with those without SMM. Almost half of patients (46.2%) with SMM had a HDP diagnosis. After controlling for maternal characteristics, HDP, maternal age, county Medicaid enrollment, and trimester PNC entry were not associated with SMM risk. However, Black patients with HDP were at increased risk for SMM compared with White patients with HDP when other factors were taken into account (adjusted odds ratio [aOR] = 1.37, 95% CI: 1.11-1.69). Patients with HDP and SMM were more likely to have a prenatal hospitalization (aOR = 1.45, 95% CI: 1.20-1.76), emergency visit (aOR = 1.30, 95% CI: 1.07-1.57), and postpartum cardiovascular prescription (aOR = 2.43, 95% CI: 1.95-3.04).

CONCLUSION

Rates of SMM differed by age, race, Medicaid income eligibility, and county Medicaid enrollment but were highest among patients with clinical comorbidities, especially HDP. However, among patients with HDP, Black patients had an elevated risk of severe morbidity even after controlling for other characteristics.

KEY POINTS

· Patients with SMM were more likely to have a HDP diagnosis.. · Among those with HDP, Black patients had elevated risk of SMM.. · Differences in care delivery did not explain SMM disparities..

Racial and Ethnic Disparities among Pregnancies with Chronic Hypertension and Adverse Outcomes

OBJECTIVE

We aimed to ascertain whether the risk of adverse pregnancy outcomes in the United States among individuals with chronic hypertension differed by maternal race and ethnicity and to assess the temporal trend.

STUDY DESIGN

Population-based retrospective study using the U.S. Vital Statistics datasets evaluated pregnancies with chronic hypertension, singleton live births that delivered at 24 to 41 weeks. The coprimary outcomes were a composite maternal adverse outcome (preeclampsia, primary cesarean delivery, intensive care unit admission, blood transfusion, uterine rupture, or unplanned hysterectomy) and a composite neonatal adverse outcome (preterm birth, small for gestational age, Apgar's score <5 at 5 minutes, assisted ventilation> 6 hours, seizure, or death). Multivariable Poisson regression models were used to estimate adjusted relative risks (aRRs) and 95% confidence intervals (CIs).

RESULTS

Between 2014 and 2019, the rate of chronic hypertension in pregnancy increased from 1.6 to 2.2%. After multivariable adjustment, an increased risk for the composite maternal adverse outcome was found in Black (aRR = 1.10, 95% CI = 1.09-1.11), Hispanic (aRR = 1.04, 95% CI = 1.02-1.05), and Asian/Pacific Islander (aRR = 1.07, 95% CI = 1.05-1.10), compared with White individuals. Compared with White individuals, the risk of the composite neonatal adverse outcome was higher in Black (aRR = 1.39, 95% CI = 1.37-1.41), Hispanic (aRR = 1.15, 95% CI = 1.13-1.16), Asian/Pacific Islander (aRR = 1.34, 95% CI = 1.31-1.37), and American Indian (aRR = 1.12, 95% CI = 1.07-1.17). The racial and ethnic disparity remained unchanged during the study period.

CONCLUSION

We found a racial and ethnic disparity with maternal and neonatal adverse outcomes in pregnancies with chronic hypertension that remained unchanged throughout the study period.

KEY POINTS

· Between 2014 and 2019, the rate of chronic hypertension in pregnancy increased.. · Among people with chronic hypertension, there are racial and ethnic disparities in adverse outcomes.. · Black, Hispanic, and Asian/Pacific Islander have a higher risk of the adverse neonatal outcomes..

Prepregnancy plant-based diets and risk of hypertensive disorders of pregnancy

BACKGROUND

Plant-based diets have been associated with a lower risk of cardiovascular disease in nonpregnant adults, but specific evidence for their effects on risk of hypertensive disorders of pregnancy is scarce.

OBJECTIVE

This study aimed to evaluate the prospective association between adherence to plant-based diets before pregnancy and the risk for hypertensive disorders of pregnancy. We hypothesized that women with higher adherence to plant-based diets would have a lower risk for hypertensive disorders of pregnancy.

STUDY DESIGN

We followed 11,459 parous women (16,780 singleton pregnancies) without chronic diseases, a history of preeclampsia, and cancers who participated in the Nurses' Health Study II (1991-2009), which was a prospective cohort study. Diet was assessed every 4 years using a validated food frequency questionnaire from which we calculated the plant-based diet index (higher score indicates higher adherence) to evaluate the health associations of plant-based diets among participants while accounting for the quality of plant-based foods. Participants self-reported hypertensive disorders of pregnancy, including preeclampsia and gestational hypertension. We estimated the relative risk of hypertensive disorders of pregnancy in relation to plant-based diet index adherence in quintiles using generalized estimating equations log-binomial regression while adjusting for potential confounders and accounting for repeated pregnancies for the same woman.

RESULTS

The mean (standard deviation) age at first in-study pregnancy was 35 (4) years. A total of 1033 cases of hypertensive disorders of pregnancy, including 482 cases of preeclampsia (2.9%) and 551 cases of gestational hypertension (3.3%) were reported. Women in the highest quintile of plant-based diet index were significantly associated with a lower risk for hypertensive disorders of pregnancy than women in the lowest quintile (relative risk, 0.76; 95% confidence interval, 0.62-0.93). There was an inverse dose-response relationship between plant-based diet index and risk for hypertensive disorders of pregnancy. The multivariable-adjusted relative risk (95% confidence interval) of hypertensive disorders of pregnancy for women in increasing quintiles of plant-based diet index were 1 (ref), 0.93 (0.78-1.12), 0.86 (0.72-1.03), 0.84 (0.69-1.03), and 0.76 (0.62-0.93) with a significant linear trend across quintiles (P trend=.005). This association was slightly stronger for gestational hypertension (relative risk, 0.77; 95% confidence interval, 0.60-0.99) than for preeclampsia (relative risk, 0.80; 95% confidence interval, 0.61-1.04). Mediation analysis suggested that body mass index evaluation for dietary assessment and pregnancy explained 39% (95% confidence interval, 15%-70%]) of the relation between plant-based diet index and hypertensive disorders of pregnancy and 48% (95% confidence interval, 12%-86%]) of the relation between plant-based diet index and gestational hypertension.

CONCLUSION

Higher adherence to plant-based diets was associated with a lower risk of developing hypertensive disorders of pregnancy. Much of the benefit seems to be related to improved weight control.

Racial and Economic Segregation Over the Life Course and Incident Hypertensive Disorders of Pregnancy Among Black Women in California

Black women in the United States have the highest incidence of hypertensive disorders of pregnancy (HDP) and are disproportionately burdened by its adverse sequalae, compared with women of all racial and ethnic groups. Segregation, a key driver of structural racism for Black families, can provide information critical to understanding these disparities. We examined the association between racial and economic segregation at 2 points and incident HDP using intergenerationally linked birth records of 45,204 Black California-born primiparous mothers (born 1982-1997) and their infants (born 1997-2011), with HDP ascertained from hospital discharge records. Women's early childhood and adulthood neighborhoods were categorized as deprived, mixed, or privileged based on the Index of Concentration at the Extremes (a measure of concentrated racial and economic segregation), yielding 9 life-course trajectories. Women living in deprived neighborhoods at both time points experienced the highest odds of HDP (from mixed effect logistic regression, unadjusted odds ratio = 1.26, 95% confidence interval: 1.13, 1.40) compared with women living in privileged neighborhoods at both time points. All trajectories involving residence in a deprived neighborhood in early childhood or adulthood were associated with increased odds of HDP, whereas mixed-privileged and privileged-mixed trajectories were not. Future studies should assess the causal nature of these associations.

Acculturation, Acculturative Stress, Experience of Discrimination, and Cesarean Birth in Mexican American Women

Introduction: There is evidence that Mexican Americans are more likely to have cesarean birth than non-Hispanic White Americans. The purpose of this study was to identify factors related to acculturation along with psychological and sociodemographic factors associated with birth mode in a prospective cohort of Mexican American women in Texas. Methods: This secondary analysis included 244 Mexican American pregnant women. Women with a prior cesarean birth were excluded. Variable selection was guided by Berry's Theoretical Framework of Acculturation. Correlations and logistic regression were used to examine relationships and predict risk of cesarean birth. Mediators and moderators were also considered. Results: Eighty women birthed by cesarean. Analytic and parent samples were similar in all demographics. After controlling for parity in logistic regression, greater Spanish language-related acculturative stress (adjusted odds ratio [AOR], 1.06, 95% confidence interval [CI] [1.01, 1.11], p = .028) and experience of discrimination (AOR, 1.18, 95% CI [1.00, 1.38], p = .044) increased the odds of cesarean birth. The relationship between acculturative stress and birth mode was moderated by birth facility. Conclusion: Acculturative stress and discrimination may play a role in birth mode for Mexican American women birthing in Texas. Birth facility and acculturative stress may be interacting in ways that have clinical significance but are yet unexplored.

Trends of hypertensive disorders of pregnancy among the Medicaid population before and during COVID-19

Hypertensive disorders of pregnancy (HDP) are a group of high blood pressure disorders during pregnancy that are a leading cause of maternal and infant morbidity and mortality. The trend of HDP among the Medicaid population during the coronavirus disease of 2019 (COVID-19) is severely lacking. To determine the trends in the annual prevalence of HDP among Louisiana Medicaid pregnant women before and during the COVID-19 pandemic (2016-2021), a total of 113,776 pregnant women aged 15-50 years was included in this study. For multiparous individuals, only the first pregnancy was used in the analyses. Women with a diagnosis of each type-specific HDP were identified by using the ICD-10 codes. The prevalence of HDP increased from 10.5% in 2016 to 17.7% in 2021. The highest race/ethnicity-specific incidence of HDP was seen in African American women (13.1%), then white women (9.4%), followed by other women (7.9%). HDP remains as a very prevalent and significant global health issue, especially in African American women. Obesity and physical inactivity are major risk factors of HDP, which became amplified during the COVID-19 pandemic and led to a higher prevalence of HDP. Severe HDP substantially increases the risk of mortality in offspring and long-term issues in both the mother and infant. This is very pertinent to the Medicaid population due to the disparities and barriers that diminish the quality of healthcare they receive.

Political representation and perinatal outcomes to Black, White, and Hispanic people in Georgia: a cross-sectional study

PURPOSE

Our goal was to estimate differences in perinatal outcomes by racial differences in political representation, a measure of structural racism.

METHODS

We gathered data on the racial composition of county-level elected officials for all counties in Georgia (n = 159) in 2022. We subtracted the percent of non-White elected officials from the percent of non-White residents to calculate the "representation difference," with greater positive values indicating a larger disparity. We linked this to data from 2020-2021 birth certificates (n = 238,795) on outcomes (preterm birth, <37 weeks, low birthweight birth <2500 g, birthweight, hypertensive disorders of pregnancy, cesarean delivery). We fit log binomial and linear models with generalized estimating equations, stratified by individual race/ethnicity and including individual and county covariates.

RESULTS

Median representation difference was 17.5% points (interquartile range: 17.2). A 25-percentile point increase in representation difference was associated with a greater risk of hypertensive disorders of pregnancy [White: adjusted risk ratio (RR): 1.12, 95% confidence interval (CI): (1.05, 1.2), Black: 1.06, 95% CI: (0.95, 1.17), other: 1.14, 95% CI: (1.0, 1.3), Hispanic: 1.19, 95% CI: (1.07, 1.32)] and lower mean birthweight for Black birthing people [adjusted beta -15.3, 95% CI: (-25.5, -7.4)].

CONCLUSIONS

Parity in political representation may be associated with healthier environments.

Achieving Consensus Among Stakeholders Using the Nominal Group Technique: A Perinatal Quality Collaborative Approach

BACKGROUND AND OBJECTIVES

Public health systems exhibiting strong connections across the workforce experience substantial population health improvements. This is especially important for improving quality and achieving value among vulnerable populations such as mothers and infants. The purpose of this research was to demonstrate how Alabama's newly formed perinatal quality collaborative (Alabama Perinatal Quality Collaborative [ALPQC]) used evidenced-based processes to achieve consensus in identifying population quality improvement (QI) initiatives.

METHODS

This multiphase quantitative and qualitative study engaged stakeholders (n = 44) at the ALPQC annual meeting. Maternal and neonatal focused QI project topics were identified and catalogued from active perinatal quality collaborative websites. The Delphi method and the nominal group technique (NGT) were used to prioritize topics using selected criteria ( impact , enthusiasm , alignment , and feasibility ) and stakeholder input.

RESULTS

Using the Delphi method, 11 of 27 identified project topics met inclusion criteria for stakeholder consideration. Employing the NGT, maternal projects received more total votes (n = 535) than neonatal projects (n = 313). Standard deviations were higher for neonatal projects (SD: feasibility = 10.9, alignment = 17.9, enthusiasm = 19.2, and impact = 22.1) than for maternal projects (SD: alignment = 5.9, enthusiasm = 7.3, impact = 7.9, and feasibility = 11.1). Hypertension in pregnancy (n = 117) and neonatal abstinence syndrome (n = 177) achieved the most votes total and for impact (n = 35 and n = 54, respectively) but variable support for feasibility .

CONCLUSIONS

Together, these techniques achieved valid consensus across multidisciplinary stakeholders in alignment with state public health priorities. This model can be used in other settings to integrate stakeholder input and enhance the value of a common population QI agenda.

Chronic Hypertension in Pregnancy: A Lens Into Cardiovascular Disease Risk and Prevention

Hypertension is a major, modifiable risk factor for cardiovascular disease (CVD) in the United States. Over the past decade, the prevalence of chronic hypertension (CHTN) during pregnancy has nearly doubled with persistent race- and place-based disparities. Blood pressure elevations are of particular concern during pregnancy given higher risk of maternal and fetal morbidity and mortality, as well as higher lifetime risk of CVD in birthing individuals with CHTN. When identified during pregnancy, CHTN can, therefore, serve as a lens into CVD risk, as well as a modifiable target to mitigate cardiovascular risk throughout the life course. Health services and public health interventions that equitably promote cardiovascular health during the peripartum period could have an important impact on preventing CHTN and reducing lifetime risk of CVD. This review will summarize the epidemiology and guidelines for the diagnosis and management of CHTN in pregnancy; describe the current evidence for associations between CHTN, adverse pregnancy outcomes, and CVD; and identify opportunities for peripartum care to equitably reduce hypertension and CVD risk throughout the life course.

Person-centered care for diverse women: Narrative review of foundational research

Despite advocacy and recommendations to improve health care and health for persons who identify as women, women continue to face inequities in access to and quality of care. Person-centered care for women is one approach that could reduce gendered inequities. We conducted a series of studies to understand what constitutes person-centered care for women and how to achieve it. The overall aim of this article is to highlight the key findings of those studies that can inform policy, practice, and ongoing research. We conducted a narrative review of all studies related to person-centered care for women conducted in our group starting in 2018 over a 5-year period, which was general at the outset, and increasingly focused on racialized immigrant women who constitute a large proportion of the Canadian population. We organized study summaries by research phase: synthesis of person-centered care for women research, exploration of existing person-centered care for women guidance, consultation with key informants, consensus survey of key informants to prioritize strategies to achieve person-centered care for women, and consensus meeting with key informants to prioritize future research. We conducted the reported research in collaboration with an advisory group of diverse women and managers of community agencies. Our research revealed that little prior research had fully established what constitutes person-centered care for women, and in particular, how to achieve it. We also found little acknowledgment of person-centered care for women or strategies to support it in medical curriculum, clinical guidelines, or healthcare policies. We subsequently consulted women who differed by age, ethno-cultural group, health issue, education and geography, and clinicians of different specialties, who offered considerable insight on strategies to support person-centered care for women. Other diverse women, clinicians, healthcare managers, and researchers prioritized issues that warrant future research. We hope that by compiling a summary of our completed research, we draw attention to the need for person-centered care for women and motivate others to pursue it through policy, practice, and research.

Racial and ethnic differences in the relationship between infant loss after prior live birth and hypertensive disorders in pregnancy

BACKGROUND

Race and ethnicity influence the distribution and severity of hypertensive disorders of pregnancy (HDP) in the U.S. population, although the impact of prior infant loss on this relationship requires further investigation.

OBJECTIVES

The aim of this study was to assess the relationship between history of infant loss and the risk of HDP by maternal race and ethnicity.

METHODS

For this large cross-sectional study, data were analyzed from the National Center for Health Statistics Vital Statistics Natality Birth Data, 2014-2017. The primary outcome was HDP, and the primary predictor was infant loss after prior live birth. Maternal race/ethnicity was the secondary predictor categorized as Non-Hispanic White (NHW), Non-Hispanic Black (NHB), Hispanic, Asian, or Other. Multiple logistic regression was used to assess the association between history of infant loss and HDP by race and ethnicity.

RESULTS

The 9,439,520 women included in this sample were 51% NHW, 15% NHB, 25% Hispanic, 6% Asian, and 3% Other with a mean age of 29.8 ± 5.3 years. In adjusted analyses, infant loss after prior live birth was significantly associated with an 11% odds of HDP (OR 1.11, 95% CI 1.08, 1.13). Stratified by race, NHB (OR 1.28; 95% CI 1.21, 1.36) women had significantly higher odds of HDP, and Hispanic (OR 0.84, 95% CI 0.79, 0.90) and Asian (OR 0.85, 95% CI 0.75, 0.97) women had significantly lower odds compared to NHW women. Within races, all women with infant loss after prior live birth had significantly higher odds of HDP (p < .001), except Other women (p = .632).

CONCLUSIONS

Infant loss after prior live birth was significantly associated with higher odds of HDP among NHB women after adjusting for covariates. Further research is warranted to assess underlying mechanisms associated with higher odds of HDP in NHB women.

Risk factors and pregnancy outcomes vary among Asian American, Native Hawaiian, and Pacific Islander individuals giving birth in California

OBJECTIVE

To compare frequencies of risk factors and pregnancy outcomes in ethnic groups versus the combined total of Asian American, Native Hawaiian, and Pacific Islander (AANHPI) populations.

METHODS

Using linked birth and fetal death certificate and maternal hospital discharge data (California 2007-2018), we estimated frequencies of 15 clinical and sociodemographic exposures and 11 pregnancy outcomes. Variability across 15 AANHPI groups was compared using a heat map and compared to frequencies for the total group (n = 904,232).

RESULTS

AANHPI groups varied significantly from each other and the combined total regarding indicators of social disadvantage (e.g., range for high school-level educational or less: 6.4% Korean-55.8% Samoan) and sociodemographic factors (e.g., maternal age <20 years: 0.2% Chinese-8.8% Guamanian) that are related to adverse pregnancy outcomes. Perinatal outcomes varied significantly (e.g., severe maternal morbidity: 1.2% Korean-1.9% Filipino). No single group consistently had risk factors or outcome prevalence at the extremes, i.e., no group was consistently better or worse off across examined factors.

CONCLUSIONS

Substantial variability in perinatal risk factors and outcomes exists across AANHPI groups. Aggregation into "AANHPI" is not appropriate for outcome reporting.

Use of Self-Measured Blood Pressure Monitoring to Improve Hypertension Equity

PURPOSE OF REVIEW

To evaluate how self-measured blood pressure (SMBP) monitoring interventions impact hypertension equity.

RECENT FINDINGS

While a growing number of studies have recruited participants from safety-net settings, racial/ethnic minority groups, rural areas, or lower socio-economic backgrounds, few have reported on clinical outcomes with many choosing to evaluate only patient-reported outcomes (e.g., satisfaction, engagement). The studies with clinical outcomes demonstrate that SMBP monitoring (a) can be successfully adopted by historically excluded patient populations and safety-net settings and (b) improves outcomes when paired with clinical support. There are few studies that explicitly evaluate how SMBP monitoring impacts hypertension disparities and among rural, low-income, and some racial/ethnic minority populations. Researchers need to design SMBP monitoring studies that include disparity reduction outcomes and recruit from broader populations that experience worse hypertension outcomes. In addition to assessing effectiveness, studies must also evaluate how to mitigate multi-level barriers to real-world implementation of SMBP monitoring programs.

Black Nativity and Health Disparities: A Research Paradigm for Understanding the Social Determinants of Health

After more than a century of research and debate, the scientific community has yet to reach agreement on the principal causes of racialized disparities in population health. This debate currently centers on the degree to which "race residuals" are a result of unobserved differences in the social context or unobserved differences in population characteristics. The comparative study of native and foreign-born Black populations represents a quasi-experimental design where race is "held constant". Such studies present a unique opportunity to improve our understanding of the social determinants of population health disparities. Since native and foreign-born Black populations occupy different sociocultural locations, and since populations with greater African ancestry have greater genetic diversity, comparative studies of these populations will advance our understanding of the complex relationship between sociocultural context, population characteristics and health outcomes. Therefore, we offer a conceptual framing for the comparative study of native and foreign-born Blacks along with a review of 208 studies that compare the mental and physical health of these populations. Although there is some complexity, especially with respect to mental health, the overall pattern is that foreign-born Blacks have better health outcomes than native-born Blacks. After reviewing these studies, we conclude with suggestions for future studies in this promising area of social and medical research.

Hypertensive Disorders of Pregnancy and Cardiovascular Disease Risk Across Races and Ethnicities: A Review

Pregnancy is often considered to be a "cardiometabolic stress-test" and pregnancy complications including hypertensive disorders of pregnancy can be the first indicator of increased risk of future cardiovascular disease. Over the last two decades, more evidence on the association between hypertensive disorders of pregnancy and cardiovascular disease has become available. However, despite the importance of addressing existing racial and ethnic differences in the incidence of cardiovascular disease, most research on the role of hypertensive disorders of pregnancy is conducted in white majority populations. The fragmented knowledge prohibits evidence-based targeted prevention and intervention strategies in multi-ethnic populations and maintains the gap in health outcomes. In this review, we present an overview of the evidence on racial and ethnic differences in the occurrence of hypertensive disorders of pregnancy, as well as evidence on the association of hypertensive disorders of pregnancy with cardiovascular risk factors and cardiovascular disease across different non-White populations, aiming to advance equity in medicine.

Nitric oxide-related gene and microRNA expression in peripheral blood in pregnancy vary by self-reported race

Adverse pregnancy outcomes disproportionately affect non-Hispanic (NH) Black patients in the United States. Structural racism has been associated with increased psychosocial distress and inflammation and may trigger oxidative stress. Thus, the nitric oxide (NO) pathway (involved in the regulation of inflammation and oxidative stress) may partly explain the underlying disparities in obstetric outcomes.Cohort study of 154 pregnant patients with high-risk obstetric histories; n = 212 mRNAs and n = 108 microRNAs (miRNAs) in the NO pathway were evaluated in circulating white blood cells. NO pathway mRNA and miRNA transcript counts were compared by self-reported race; NH Black patients were compared with women of other races/ethnicities. Finally, miRNA-mRNA expression levels were correlated.Twenty-two genes (q < 0.10) were differentially expressed in self-identified NH Black individuals. Superoxide dismutase 1 (SOD1), interleukin-8 (IL-8), dynein light chain LC8-type 1 (DYNLL1), glutathione peroxidase 4 (GPX4), and glutathione peroxidase 1 (GPX1) were the five most differentially expressed genes among NH Black patients compared to other patients. There were 63 significantly correlated miRNA-mRNA pairs (q < 0.10) demonstrating potential miRNA regulation of associated target mRNA expression. Ten miRNAs that were identified as members of significant miRNA-mRNA pairs were also differentially expressed among NH Black patients (q < 0.10).These findings support an association between NO pathway and inflammation and infection-related mRNA and miRNA expression in blood drawn during pregnancy and patient race/ethnicity. These findings may reflect key differences in the biology of inflammatory gene dysregulation that occurs in response to the stress of systemic racism and that underlies disparities in pregnancy outcomes.

Gestational Diabetes and Hypertensive Disorders of Pregnancy by Maternal Birthplace

INTRODUCTION

Gestational diabetes mellitus and hypertensive disorders of pregnancy increase the risk for future adverse health outcomes in the pregnant woman and baby, and disparities exist in the rates of gestational diabetes mellitus and hypertensive disorders of pregnancy by race/ethnicity. The objective of this study is to identify the differences in gestational diabetes mellitus and hypertensive disorders of pregnancy rates by maternal place of birth within race/ethnicity groups.

METHODS

In women aged 15-44 years at first live singleton birth in U.S. surveillance data between 2014 and 2019, age-standardized rates of gestational diabetes mellitus and hypertensive disorders of pregnancy and the rate ratios of gestational diabetes mellitus and hypertensive disorders of pregnancy in women born outside versus those born in the U.S. were evaluated, stratified by race/ethnicity. Analyses were conducted in 2021.

RESULTS

Of 8,574,264 included women, 6,827,198 were born in the U.S. (mean age=26.2 [SD 5.7] years), and 1,747,066 were born outside the U.S. (mean age=28.2 [SD=5.8] years). Overall, the gestational diabetes mellitus rate was higher in women born outside than in those born in the U.S. (70.3, 95% CI=69.9, 70.7 vs 53.2, 95% CI=53.0, 53.4 per 1,000 live births; rate ratio=1.32, 95% CI=1.31, 1.33), a pattern observed in most race/ethnic groups. By contrast, the overall hypertensive disorders of pregnancy rate was lower in those born outside than in those born in the U.S. (52.5, 95% CI=52.2, 52.9 vs 90.1, 95% CI=89.9, 90.3 per 1,000 live births; rate ratio=0.58, 95% CI=0.58, 0.59), a pattern observed in most race/ethnic groups.

CONCLUSIONS

In the U.S., gestational diabetes mellitus rates were higher and hypertensive disorders of pregnancy rates were lower in women born outside the U.S. than in those born in the U.S. in most race/ethnicity groups.

Characterizing Hypertensive Disorders of Pregnancy Among Medicaid Recipients in a Nonexpansion State

Background: The incidence of hypertensive disorders of pregnancy (HDP) are on the rise in the United States, especially in the South, which has a heavy chronic disease burden and large number of Medicaid nonexpansion states. Sizeable disparities in HDP outcomes exist by race/ethnicity, geography, and health insurance coverage. Our objective is to explore HDP in the Alabama Medicaid maternity population, and the association of maternal sociodemographic, clinical, and care utilization characteristics with HDP diagnosis. Materials and Methods: Data were from Alabama Medicaid delivery claims in 2017. Bivariate analyses were used to examine maternal characteristics by HDP diagnosis. Hierarchical generalized linear models, with observations nested at the county level, were used to assess multivariable relationships between maternal characteristics and HDP diagnosis. Results: Among women with HDP diagnosis, a higher proportion were older, Black, had other comorbidities, and had more perinatal hospitalizations or emergency visits compared with those without HDP diagnosis. There were increased odds of an HDP diagnosis for older women and those with comorbidities. Black women (adjusted odds ratio [aOR] = 1.24, 95% confidence interval [CI]: 1.16-1.33), women insured only during pregnancy by Sixth Omnibus Reconciliation Act Medicaid (aOR = 1.08, 95% CI: 1.02-1.15), and women entering prenatal care (PNC) in the second trimester (aOR = 1.10, 95% CI: 1.03-1.18) had elevated odds of HDP diagnosis compared with their counterparts. Conclusions: Beyond traditional demographic and clinical risk factors, not having preconception insurance coverage or first trimester PNC entry were associated with higher odds of HDP diagnosis. Improving the provision and timing of maternity coverage among Medicaid recipients, particularly in nonexpansion states, may help identify and treat women at risk of HDP and associated adverse perinatal outcomes.

Integrative Review of Disparities in Mode of Birth and Related Complications among Mexican American Women

INTRODUCTION

Cesarean rates are particularly high among Hispanic women in some regions of the United States, placing a disproportionate health burden on women and their newborns. This integrative review synthesized the literature on mode of birth (vaginal vs cesarean) and related childbirth complications (hemorrhage, surgical site infection, perineal trauma) among Mexican American women living in the United States.

METHODS

Four electronic databases, PubMed, Embase, CINAHL, and SCOPUS, were searched to identify studies meeting the inclusion criteria, research studies that included Mexican American women who were pregnant or postpartum. Results were limited to English language and publications that were peer-reviewed and published before May 2020. Covidence was used in article identification, screening, and assessment. Critical appraisal of the research was performed using the Quality Assessment Tool for Studies with Diverse Designs.

RESULTS

Ten articles met inclusion criteria. In some studies, Mexican American women born in the United States were more likely to have cesareans than women born in Mexico; in other studies, these findings were reversed. Mexican American women often had lower unadjusted cesarean rates compared with non-Hispanic white women, but adjusting for birth facility (some facilities perform more cesareans than others), sociodemographic, and risk factors often revealed Mexican American women have a higher adjusted risk for cesarean birth. Women with higher socioeconomic status had higher cesarean rates compared with women with lower socioeconomic status. In studies of birth outcome by level of acculturation, women who were US-oriented had higher rates of cesarean and more frequent perinatal complications. By ethnic subgroup, rates of cesarean and complications varied among Hispanic women.

DISCUSSION

Birth facility was associated with perinatal outcomes for Mexican American women; those who gave birth at higher-performing facilities had better outcomes when compared with women who gave birth at lower-performing facilities. After adjusting for pregnancy complications, Mexican American women had a greater risk for cesarean birth compared with non-Hispanic white women, a finding that may have clinical practice implications. Level of acculturation affected birth outcomes, but more research using precise instruments is needed.

Use of Race, Ethnicity, and National Origin in Studies Assessing Cardiovascular Risk in Women With a History of Hypertensive Disorders of Pregnancy

Women with a history of hyperBtensive disorders of pregnancy (HDP) are at particularly high risk for cardiovascular disease (CVD) and CVD-related death, and certain racial and ethnic subpopulations are disproportionately affected by these conditions. We examined the use of race, ethnicity, and national origin in observational studies assessing CVD morbidity and mortality in women with a history of HDP. A total of 124 studies, published between 1976 and 2021, were reviewed. We found that white women were heavily overrepresented, encompassing 53% of all participants with HDP. There was limited and heterogeneous reporting of race and ethnicity information across studies and only 27 studies reported including race and/or ethnicity variables in at least 1 statistical analysis. Only 2 studies mentioned the use of these variables as a strength; several others (k = 18) reported a lack of diversity among participants as a study limitation. Just over half of included articles (k = 68) reported at least 1 sociodemographic variable other than race and ethnicity (eg, marital status and income); however, none investigated how they might have worked synergistically or antagonistically with race and/or ethnicity to influence participants' risk of CVD. These findings highlight significant areas for improvement in cardiovascular obstetrics research, including the need for more robust and standardized methods for collecting, reporting, and using sociodemographic information. Future studies of CVD risk in women with a history of HDP should explicitly examine racial and ethnic differences and use an intersectional approach.

Nativity-Related Disparities in Preeclampsia and Cardiovascular Disease Risk Among a Racially Diverse Cohort of US Women

IMPORTANCE

Preeclampsia is an independent risk factor for future cardiovascular disease and disproportionally affects non-Hispanic Black women. The association of maternal nativity and duration of US residence with preeclampsia and other cardiovascular risk factors is well described among non-Hispanic Black women but not among women of other racial and ethnic groups.

OBJECTIVE

To examine differences in cardiovascular risk factors and preeclampsia prevalence by race and ethnicity, nativity, and duration of US residence among Hispanic, non-Hispanic Black, and non-Hispanic White women.

DESIGN, SETTING, AND PARTICIPANTS

This cross-sectional analysis of the Boston Birth Cohort included a racially diverse cohort of women who had singleton deliveries at the Boston Medical Center from October 1, 1998, to February 15, 2016. Participants self-identified as Hispanic, non-Hispanic Black, or non-Hispanic White. Data were analyzed from March 1 to March 31, 2021.

EXPOSURES

Maternal nativity and duration of US residence (<10 vs ≥10 years) were self-reported.

MAIN OUTCOME AND MEASURES

Diagnosis of preeclampsia, the outcome of interest, was retrieved from maternal medical records.

RESULTS

A total of 6096 women (2400 Hispanic, 2699 non-Hispanic Black, and 997 non-Hispanic White) with a mean (SD) age of 27.5 (6.3) years were included in the study sample. Compared with Hispanic and non-Hispanic White women, non-Hispanic Black women had the highest prevalence of chronic hypertension (204 of 2699 [7.5%] vs 65 of 2400 [2.7%] and 28 of 997 [2.8%], respectively), obesity (658 of 2699 [24.4%] vs 380 of 2400 [15.8%] and 152 of 997 [15.2%], respectively), and preeclampsia (297 of 2699 [11.0%] vs 212 of 2400 [8.8%] and 71 of 997 [7.1%], respectively). Compared with their counterparts born outside the US, US-born women in all 3 racial and ethnic groups had a significantly higher prevalence of obesity (Hispanic women, 132 of 556 [23.7%] vs 248 of 1844 [13.4%]; non-Hispanic Black women, 444 of 1607 [27.6%] vs 214 of 1092 [19.6%]; non-Hispanic White women, 132 of 776 [17.0%] vs 20 of 221 [9.0%]), smoking (Hispanic women, 98 of 556 [17.6%] vs 30 of 1844 [1.6%]; non-Hispanic Black women, 330 of 1607 [20.5%] vs 53 of 1092 [4.9%]; non-Hispanic White women, 382 of 776 [49.2%] vs 42 of 221 [19.0%]), and severe stress (Hispanic women, 76 of 556 [13.7%] vs 85 of 1844 [4.6%]; non-Hispanic Black women, 231 of 1607 [14.4%] vs 120 of 1092 [11.0%]; non-Hispanic White women, 164 of 776 [21.1%] vs 26 of 221 [11.8%]). After adjusting for sociodemographic and cardiovascular risk factors, birth status outside the US (adjusted odds ratio [aOR], 0.74 [95% CI, 0.55-1.00]) and shorter duration of US residence (aOR, 0.62 [95% CI, 0.41-0.93]) were associated with lower odds of preeclampsia among non-Hispanic Black women. However, among Hispanic and non-Hispanic White women, maternal nativity (aOR for Hispanic women, 1.07 [95% CI, 0.72-1.60]; aOR for non-Hispanic White women, 0.98 [95% CI, 0.49-1.96]) and duration of US residence (aOR for Hispanic women <10 years, 1.04 [95% CI, 0.67-1.59]; aOR for non-Hispanic White women <10 years, 1.20 [95% CI, 0.48-3.02]) were not associated with preeclampsia.

CONCLUSIONS AND RELEVANCE

Nativity-related disparities in preeclampsia persisted among non-Hispanic Black women but not among Hispanic and non-Hispanic White women after adjusting for sociodemographic and cardiovascular risk factors. Further research is needed to explore the interplay of factors contributing to nativity-related disparities in preeclampsia, particularly among non-Hispanic Black women.

Understanding racial disparities in severe maternal morbidity using Bayesian network analysis

Previous studies have evaluated the marginal effect of various factors on the risk of severe maternal morbidity (SMM) using regression approaches. We add to this literature by utilizing a Bayesian network (BN) approach to understand the joint effects of clinical, demographic, and area-level factors. We conducted a retrospective observational study using linked birth certificate and insurance claims data from the Arkansas All-Payer Claims Database (APCD), for the years 2013 through 2017. We used various learning algorithms and measures of arc strength to choose the most robust network structure. We then performed various conditional probabilistic queries using Monte Carlo simulation to understand disparities in SMM. We found that anemia and hypertensive disorder of pregnancy may be important clinical comorbidities to target in order to reduce SMM overall as well as racial disparities in SMM.

Dietary Habits and Medications to Control Hypertension Among Women of Child-Bearing Age in the United States from 2001 to 2016

BACKGROUND

Hypertension (HTN) in pregnancy is a leading cause of maternal morbidity and mortality in the United States. Although the Dietary Approaches to Stop Hypertension (DASH) diet is recommended for all adults with HTN, rates of DASH adherence and antihypertensive medication use in women of child-bearing age are unknown. Our objectives were to determine DASH adherence and antihypertensive medication use in women of child-bearing age.

METHODS

In the National Health and Nutrition Examination Surveys from 2001 to 2016, we estimated DASH adherence among women of child-bearing age (20-50 years). We derived a DASH score (0-9) based on 9 nutrients, with DASH adherence defined as DASH score ≥4.5. HTN was defined by blood pressure (BP) ≥130/80 mm Hg or antihypertensive medication use. DASH scores were compared across BP categories and antihypertensive medication use was categorized.

RESULTS

Of the 7,782 women, the mean age (SE) was 32.8 (0.2) years, 21.4% were non-Hispanic Black, and 20.3% had HTN. The mean DASH score was 2.11 (0.06) for women with self-reported HTN and 2.40 (0.03) for women with normal BP (P < 0.001). DASH adherence was prevalent in 6.5% of women with self-reported HTN compared with 10.1% of women with normal BP (P < 0.05). Self-reported HTN is predominantly managed with medications (84.8%), while DASH adherence has not improved in these women from 2001 to 2016. Moreover, 39.5% of US women of child-bearing age are taking medications contraindicated in pregnancy.

CONCLUSIONS

Given the benefits of optimized BP during pregnancy, this study highlights the critical need to improve DASH adherence and guide prescribing among women of child-bearing age.

Explaining the Black-White Disparity in Preterm Birth: A Consensus Statement From a Multi-Disciplinary Scientific Work Group Convened by the March of Dimes

In 2017-2019, the March of Dimes convened a workgroup with biomedical, clinical, and epidemiologic expertise to review knowledge of the causes of the persistent Black-White disparity in preterm birth (PTB). Multiple databases were searched to identify hypothesized causes examined in peer-reviewed literature, 33 hypothesized causes were reviewed for whether they plausibly affect PTB and either occur more/less frequently and/or have a larger/smaller effect size among Black women vs. White women. While definitive proof is lacking for most potential causes, most are biologically plausible. No single downstream or midstream factor explains the disparity or its social patterning, however, many likely play limited roles, e.g., while genetic factors likely contribute to PTB, they explain at most a small fraction of the disparity. Research links most hypothesized midstream causes, including socioeconomic factors and stress, with the disparity through their influence on the hypothesized downstream factors. Socioeconomic factors alone cannot explain the disparity's social patterning. Chronic stress could affect PTB through neuroendocrine and immune mechanisms leading to inflammation and immune dysfunction, stress could alter a woman's microbiota, immune response to infection, chronic disease risks, and behaviors, and trigger epigenetic changes influencing PTB risk. As an upstream factor, racism in multiple forms has repeatedly been linked with the plausible midstream/downstream factors, including socioeconomic disadvantage, stress, and toxic exposures. Racism is the only factor identified that directly or indirectly could explain the racial disparities in the plausible midstream/downstream causes and the observed social patterning. Historical and contemporary systemic racism can explain the racial disparities in socioeconomic opportunities that differentially expose African Americans to lifelong financial stress and associated health-harming conditions. Segregation places Black women in stressful surroundings and exposes them to environmental hazards. Race-based discriminatory treatment is a pervasive stressor for Black women of all socioeconomic levels, considering both incidents and the constant vigilance needed to prepare oneself for potential incidents. Racism is a highly plausible, major upstream contributor to the Black-White disparity in PTB through multiple pathways and biological mechanisms. While much is unknown, existing knowledge and core values (equity, justice) support addressing racism in efforts to eliminate the racial disparity in PTB.

Validation of Hypertensive Disorders During Pregnancy: ICD-10 Codes in a High-burden Southeastern United States Hospital

BACKGROUND

Identification of hypertensive disorders in pregnancy research often uses hospital International Classification of Diseases v. 10 (ICD-10) codes meant for billing purposes, which may introduce misclassification error relative to medical records. We estimated the validity of ICD-10 codes for hypertensive disorders during pregnancy overall and by subdiagnosis, compared with medical record diagnosis, in a Southeastern United States high disease burden hospital.

METHODS

We linked medical record data with hospital discharge records for deliveries between 1 July 2016, and 30 June 2018, in an Atlanta, Georgia, public hospital. For any hypertensive disorder (with and without unspecified codes) and each subdiagnosis (hemolysis, elevated liver enzymes, and low platelet count [HELLP] syndrome, eclampsia, preeclampsia with and without severe features, chronic hypertension, superimposed preeclampsia, and gestational hypertension), we calculated positive predictive value (PPV), negative predictive value (NPV) sensitivity, and specificity for ICD-10 codes compared with medical record diagnoses (gold standard).

RESULTS

Thirty-seven percent of 3,654 eligible pregnancies had a clinical diagnosis of any hypertensive disorder during pregnancy. Overall, ICD-10 codes identified medical record diagnoses well (PPV, NPV, specificity >90%; sensitivity >80%). PPV, NPV, and specificity were high for all subindicators (>80%). Sensitivity estimates were high for superimposed preeclampsia, chronic hypertension, and gestational hypertension (>80%); moderate for eclampsia (66.7%; 95% confidence interval [CI] = 22.3%, 95.7%), HELLP (75.0%; 95% CI = 50.9%, 91.3%), and preeclampsia with severe features (58.3%; 95% CI = 52.6%, 63.8%); and low for preeclampsia without severe features (3.2%; 95% CI, 1.4%, 6.2%).

CONCLUSIONS

We provide bias parameters for future US-based studies of hypertensive outcomes during pregnancy in high-burden populations using hospital ICD-10 codes.

Prevalence and Social and Built Environmental Determinants of Maternal Prepregnancy Obesity in 68 Major Metropolitan Cities of the United States, 2013-2016

Objective

Maternal prepregnancy obesity is related to increased maternal morbidity and mortality and poor birth outcomes. However, prevalence and risk factors for prepregnancy obesity in US cities are not known. This study examines the prevalence and social and environmental determinants of maternal prepregnancy obesity (BMI ≥30), overweight/obesity (BMI ≥25), and severe obesity (BMI ≥40) in the 68 largest metropolitan cities of the United States.

Methods

We fitted logistic and Poisson regression models to the 2013–2016 national vital statistics birth cohort data (N = 3,083,600) to derive unadjusted and adjusted city differentials in maternal obesity and to determine social and environmental determinants.

Results

Considerable disparities existed across cities, with the prevalence of prepregnancy obesity ranging from 10.4% in San Francisco to 36.6% in Detroit. Approximately 63.0% of mothers in Detroit were overweight or obese before pregnancy, compared with 29.2% of mothers in San Francisco. Severe obesity ranged from 1.4% in San Francisco to 8.5% in Cleveland. Women in Anchorage, Buffalo, Cleveland, Fresno, Indianapolis, Louisville, Milwaukee, Oklahoma City, Sacramento, St Paul, Toledo, Tulsa, and Wichita had >2 times higher adjusted odds of prepregnancy obesity compared to those in San Francisco. Race/ethnicity, maternal age, parity, marital status, nativity/immigrant status, and maternal education were important individual-level risk factors and accounted for 63%, 39%, and 72% of the city disparities in prepregnancy obesity, overweight/obesity, and severe obesity, respectively. Area deprivation, violent crime rates, physical inactivity rates, public transport use, and access to parkland and green spaces remained significant predictors of prepregnancy obesity even after controlling for individual-level covariates.

Conclusions

Substantial disparities in maternal prepregnancy obesity among the major US cities remain despite risk-factor adjustment, with women in several Southern and Midwestern cities experiencing high risks of obesity. Sound urban policies are needed to promote healthier lifestyles and favorable social and built environments for obesity reduction and improved maternal health.

Racial/Ethnic Differences in Socioeconomic Status and Medical Correlates of Trial of Labor After Cesarean and Vaginal Birth After Cesarean

Objectives: Black and Latinx women have higher rates of trial of labor after cesarean (TOLAC) compared with White women, but lower rates of vaginal birth after cesarean (VBAC). This study examined potential racial/ethnic differences in correlates of TOLAC and VBAC. Materials and Methods: The analytic sample includes term, singleton hospital births to women with one prior cesarean in birth certificate data for 2016. We estimated associations between medical factors (diabetes, hypertension, and prepregnancy obesity) and socioeconomic status (education level and insurance type) and TOLAC and VBAC using logistic regression, stratifying by race/ethnicity and testing whether coefficients differed across models. Results: Hypertension and obesity were more strongly related to reduced chances of TOLAC among White women than among women of color. For example, having a body mass index (BMI) between 30 and 39 (vs. normal BMI) was associated with a 6.3 percentage-point (pp) lower probability of TOLAC for White women, a 5.9 pp lower probability for Black women, and 2.9 pp lower probability for Latinx women. Paying out-of-pocket for birth was associated with a 5.5 pp increase in the probability of TOLAC among White women, versus a 3.2 pp decrease among Black women. Overweight and obesity were associated with lower probability of VBAC, but the magnitude of this association was smaller for Black and Latinx women than for White women. Conclusions: More research is needed to elucidate the underlying decision-making processes that lead to these associations. Future work should focus on ensuring equity in access to VBAC-supportive providers and hospitals and fostering informed decision-making after a prior cesarean.

Relationship of Preeclampsia With Maternal Place of Birth and Duration of Residence Among Non-Hispanic Black Women in the United States

BACKGROUND

Preeclampsia is one of the leading causes of maternal mortality in the United States. It disproportionately affects non-Hispanic Black (NHB) women, but little is known about how preeclampsia and other cardiovascular disease risk factors vary among different subpopulations of NHB women in the United States. We investigated the prevalence of preeclampsia by nativity (US born versus foreign born) and duration of US residence among NHB women.

METHODS

We analyzed cross-sectional data from the Boston Birth Cohort (1998-2016), with a focus on NHB women. We performed multivariable logistic regression to investigate associations between preeclampsia, nativity, and duration of US residence after controlling for potential confounders.

RESULTS

Of 2697 NHB women, 40.5% were foreign born. Relative to them, US-born NHB women were younger, in higher percentage current smokers, had higher prevalence of obesity (body mass index ≥30 kg/m2) and maternal stress, but lower educational level. The age-adjusted prevalence of preeclampsia was 12.4% and 9.1% among US-born and foreign-born women, respectively. When further categorized by duration of US residence, the prevalence of all studied cardiovascular disease risk factors except for diabetes was lower among foreign-born NHB women with <10 versus ≥10 years of US residence. Additionally, the odds of preeclampsia in foreign-born NHB women with duration of US residence <10 years was 37% lower than in US-born NHB women. In contrast, the odds of preeclampsia in foreign-born NHB women with duration of US residence ≥10 years was not significantly different from that of US-born NHB women after adjusting for potential confounders.

CONCLUSIONS

The prevalence of preeclampsia and other cardiovascular disease risk factors is lower in foreign-born than in US-born NHB women. The healthy immigrant effect, which typically results in health advantages for foreign-born women, appears to wane with longer duration of US residence (≥10 years). Further research is needed to better understand these associations.

Trends and Racial/Ethnic, Socioeconomic, and Geographic Disparities in Maternal Mortality from Indirect Obstetric Causes in the United States, 1999-2017

BACKGROUND

This study examines trends and inequalities in US maternal mortality from indirect obstetric causes (ICD-10 codes: O98-O99) and specific chronic conditions by maternal race/ethnicity, socioeconomic status, nativity/immigrant status, marital status, place and region of residence, and cause of death.

METHODS

National vital statistics data from 1999 to 2017 were used to compute maternal mortality rates by sociodemographic factors. Rate ratios and log-linear regression were used to model mortality trends and differentials.

RESULTS

During 1999-2017, maternal mortality from indirect causes showed an upward trend; the annual rates increased by 11.2% for the overall population, 12.9% for non-Hispanic Whites, and 9.4% for non-Hispanic Blacks. The proportion of all maternal deaths due to indirect causes increased from 12.0% in 1999 to 26.9% in 2017. Maternal mortality from CVD increased sharply over time, from 0.40/100,000 live births in 1999 to 1.82 in 2017. During 2013-2017, compared to non-Hispanic Whites, non-Hispanic Blacks had 83% higher, Hispanics 51% lower, and Asian/Pacific Islanders 55% lower mortality from indirect causes. Non-Hispanic White women with <12 years of education had 4.4 times higher mortality than those with a college degree. Unmarried, US-born, and women living in rural areas and deprived areas had 90%, 80%, 60%, and 97% higher maternal mortality risks than married, immigrant, and women in urban areas and affluent areas, respectively. Maternal mortality from infectious diseases, including HIV, was 4.1 times greater and from respiratory diseases 2.9 greater among non-Hispanic Black women compared to non-Hispanic White women.

CONCLUSIONS AND GLOBAL HEALTH IMPLICATIONS

While maternal mortality from direct obstetric causes has declined during the past two decades, maternal deaths due to indirect causes, particularly from pre-existing medical conditions, including CVD and metabolic disorders, have increased. Understanding complex interactions among social determinants, indirect causes, and proximate/direct causes is important to reducing maternal mortality and improving maternal health.

Trends and Social Inequalities in Maternal Mortality in the United States, 1969-2018

BACKGROUND

Despite the previous long-term decline and a recent increase in maternal mortality, detailed social inequalities in maternal mortality in the United States (US) have not been analyzed. This study examines trends and inequalities in US maternal mortality by maternal race/ethnicity, socioeconomic status, nativity/immigrant status, marital status, area deprivation, urbanization level, and cause of death.

METHODS

National vital statistics data from 1969 to 2018 were used to compute maternal mortality rates by sociodemographic factors. Mortality trends by deprivation level were analyzed by using census-based deprivation indices. Rate ratios and log-linear regression were used to model mortality trends and differentials.

RESULTS

Maternal mortality declined by 68% between 1969 and 1998. However, there was a recent upturn in maternal mortality, with the rate increasing from 9.9 deaths/100,000 live births in 1999 to 17.4 in 2018. The large racial disparity persisted over time; Black women in 2018 had a 2.4 times higher risk of maternal mortality than White women. During 2013-2017, the rate varied from 7.0 for Chinese women to 42.0 for non-Hispanic Black women. Unmarried status, US-born status, lower education, and rural residence were associated with 50-114% higher maternal mortality risks. Mothers in the most-deprived areas had a 120% higher risk of mortality than those in the most-affluent areas; both absolute and relative disparities in mortality by deprivation level widened between 2002 and 2018. Hemorrhage, pregnancy-related hypertension, embolism, infection, and chronic conditions were the leading causes of maternal death, with 31% of the deaths attributable to indirect obstetric causes.

CONCLUSIONS AND GLOBAL HEALTH IMPLICATIONS

Despite the steep long-term decline in US maternal mortality, substantial racial/ethnic, socioeconomic, and rural-urban disparities remain. Monitoring disparities according to underlying social determinants is key to reducing maternal mortality as they give rise to inequalities in social conditions and health-risk factors that lead to maternal morbidity and mortality.

Hypertensive Disorders of Pregnancy

Hypertension is the most common medical disorder occurring during pregnancy and a leading cause of maternal and perinatal morbidity and mortality. Accurate blood pressure measurement and the diagnosis and treatment of hypertensive disorders during pregnancy and in the postpartum period are pivotal to improve outcomes. This article details hemodynamic adaptations to pregnancy and provides an approach to the prevention, diagnosis, and management of hypertensive disorders of pregnancy (HDP) and hypertensive emergencies. In addition, it reviews optimal strategies for the care of women with hypertension during the fourth trimester and beyond to minimize future cardiovascular risk.

Predictors of Postpartum Persisting Hypertension Among Women with Preeclampsia Admitted at Carlos Manuel de Cèspedes Teaching Hospital, Cuba

PURPOSE

We established the prevalence and predictors of persisting hypertension in women with preeclampsia admitted at the Carlos Manuel de Cèspedes Teaching Hospital in Cuba so as to guide the health-care providers in early identification of the patients at risk for timely intervention.

PATIENTS AND METHODS

A three-year prospective cohort study was conducted between March 2017 and March 2020. A cohort of 178 women diagnosed with preeclampsia at the hypertension unit of Carlos Manuel de Cèspedes Teaching Hospital were recruited. Interviewer administered questionnaires and laboratory and ultrasound scan result forms were used to collect the data. Binary logistic regression was conducted to determine the predictors. All data analyses were conducted using STATA version 14.2.

RESULTS

Forty-five (27.8%) of the studied 162 patients were still hypertensive at 12 weeks postpartum. Maternal age of 35 years or more (aRR=1.14,95% CI:1.131-4.847, p=0.022), early onset preeclampsia (before 34 weeks of gestation) (aRR=7.93, 95% CI:1.812-34.684, p=0.006), and elevated serum creatinine levels of more than 0.8mg/dl (aRR=1.35, 95% CI:1.241-3.606, p=0.032) were the independent predictors of persisting hypertension at 12 weeks postpartum.

CONCLUSION

Recognition of these predictors and close follow-up of patients with preeclampsia will improve the ability to diagnose and monitor women likely to develop persisting hypertension before its onset for timely interventions.

Hypertension During Pregnancy

PURPOSE OF REVIEW

Hypertensive disorders of pregnancy affect about 5-10% of pregnancies impacting maternal, fetal, and neonatal outcomes. We review the recent studies in this field and discuss the pathophysiology, diagnosis, and management of hypertension during pregnancy, as well as the short- and long-term consequences on the cardiovascular health of women.

RECENT FINDINGS

Although the American College of Cardiology/American Heart Association revised their guidelines for hypertension in the general population in 2017, hypertension during pregnancy continues to be defined as a systolic blood pressure (SBP) ≥ 140 mmHg and/or a diastolic blood pressure (DBP) ≥ 90 mmHg, measured on two separate occasions. The addition of stage 1 hypertension will increase the prevalence of hypertension during pregnancy, identifying more women at risk of preeclampsia; however, more research is needed before changing the BP goal because a lower target BP has a risk of poor placental perfusion. Women with chronic hypertension have a higher incidence of superimposed preeclampsia, cesarean section, preterm delivery before 37 weeks' gestation, birth weight less than 2500 g, neonatal unit admission, and perinatal death. They also have a higher risk of developing cardiovascular disease later in life. The guidelines recommend low-dose aspirin for women with moderate and high risk of preeclampsia. While treating pregnant women with hypertension, the effectiveness of the antihypertensive agent must be balanced with risks to the fetus. Hypertensive disorders of pregnancy should be appropriately and promptly recognized and treated during pregnancy. They should further be co-managed by the obstetrician and cardiologist to decrease the long-term negative impact on the cardiovascular health of women.

Preterm birth outcomes among Asian women by maternal place of birth

OBJECTIVE

To investigate overall, spontaneous, and medically indicated preterm birth (PTB) rates between US-born and non-US-born Asian women living in California.

STUDY DESIGN

Nulliparous women with a singleton livebirth and Asian race in California between 2007 and 2011 were investigated. The prevalence of overall (<37 weeks), spontaneous, and medically indicated PTB was examined by self-reported race and place of birth among ten Asian subgroups.

RESULTS

There were marked differences in PTB rates between the individual Asian subgroups. After adjustments, non-US-born Chinese, Japanese, Vietnamese, and Indian women had lower odds of overall PTB and Chinese, Vietnamese, Cambodian, and Indian women had lower odds of spontaneous PTB compared with their US-born counterparts.

CONCLUSION

Further investigation of biological and social factors contributing to these lower odds of spontaneous PTB among the non-US-born Asian population could potentially offer clues for reducing the burden of PTB among the US born.

Cardiovascular Health Among Pregnant Women, Aged 20 to 44 Years, in the United States

Background Pregnancy is a cardiometabolic stressor and thus a critical period to address women's lifetime cardiovascular health (CVH). However, CVH among US pregnant women has not been characterized. Methods and Results We analyzed cross-sectional data from National Health and Nutrition Examination Surveys 1999 to 2014 for 1117 pregnant and 8200 nonpregnant women, aged 20 to 44 years. We assessed 7 CVH metrics using American Heart Association definitions modified for pregnancy; categorized metrics as ideal, intermediate, or poor; assigned these categories 2, 1, or 0 points, respectively; and summed across the 7 metrics for a total score of 0 to 14 points. Total scores 12 to 14 indicated high CVH; 8 to 11, moderate CVH; and 0 to 7, low CVH. We applied survey weights to generate US population-level estimates of CVH levels and compared pregnant and nonpregnant women using demographic-adjusted polytomous logistic and linear regression. Among pregnant women, the prevalences (95% CIs) of ideal levels of CVH metrics were 0.1% (0%-0.3%) for diet, 27.3% (22.2%-32.3%) for physical activity, 38.9% (33.7%-44.0%) for total cholesterol, 51.1% (46.0%-56.2%) for body mass index, 77.7% (73.3%-82.2%) for smoking, 90.4% (87.5%-93.3%) for blood pressure, and 91.6% (88.3%-94.9%) for fasting glucose. The mean total CVH score was 8.3 (95% CI, 8.0-8.7) of 14, with high CVH in 4.6% (95% CI, 0.5%-8.8%), moderate CVH in 60.6% (95% CI, 52.3%-68.9%), and low CVH in 34.8% (95% CI, 26.4%-43.2%). CVH levels were significantly lower among pregnant versus nonpregnant women; for example, 13.0% (95% CI, 11.0%-15.0%) of nonpregnant women had high CVH (adjusted, comparison P=0.01). Conclusions From 1999 to 2014, <1 in 10 US pregnant women, aged 20 to 44 years, had high CVH.

Prevalence, Awareness, Treatment, and Control and Related Factors of Hypertension in Multiethnic Agriculture, Stock-Raising, and Urban Xinjiang, Northwest China: A Cross-Sectional Screening for 47000 Adults

Background

Hypertension is the leading cause of cardiovascular disease. Distribution of hypertension and related factors among multiethnic population in Northwest China remains scarce. The aim was to determine prevalence, awareness, treatment, control, and risk factors associated with hypertension among multiethnic population in Northwest China.

Methods

We conducted a blood pressure (BP) screening project covering a third of adults in Emin Xinjiang, Northwest China, during 2014–2016. Hypertension was defined as systolic BP ≥ 140 mmHg, diastolic BP ≥ 90 mmHg, and/or taking antihypertension drugs. We compared prevalence, awareness, treatment, and control of hypertension and related factors by different regions (agriculture, stock-raising, or urban) and by ethnic groups.

Results

Totally 47,040 adults were screened with 48.5% women. Overall prevalence, awareness, treatment, and control of hypertension were 26.5%, 64.6%, 44.5%, and 15.3%, respectively. Age-gender-adjusted hypertension prevalence was higher in urban (28.2%) than in other regions and in Kazakh (30.3%) than in others. The lowest awareness and treatment rates were observed in the agricultural region and in Kazakh subjects, while the lowest control was in the stock-raising region (13.8%) and in Kazakh subjects (12.6%). After adjusting for age, gender, ethnicity, and regions, compared to normal weight, nonsmokers, and nondrinkers, obesity, smoking, and alcohol intake were significantly related to increased prevalence of hypertension by 94%, 1.5, and 3.9 folds, respectively.

Conclusions

Disparities in hypertension control among regions and ethnic groups suggested inadequate screening and treatment, especially in stock-raising regions and Kazakh populations. Control of alcohol intake, smoking, and obesity should be at high priority of health promotion.

Changes in the Prevalence of Chronic Hypertension in Pregnancy, United States, 1970 to 2010

We estimated changes in the prevalence of chronic hypertension among pregnant women and evaluated the extent to which changes in obesity and smoking were associated with these trends. We designed a population-based cross-sectional analysis of over 151 million women with delivery-related hospitalizations in the United States, 1970 to 2010. Maternal age, year of delivery (period), and maternal year of birth (birth cohort), as well as race, were examined as risk factors for chronic hypertension. Prevalence rates and rate ratios with 95% CIs of chronic hypertension in relation to age, period, and birth cohort were derived through age-period-cohort models. We also examined how changes in obesity and smoking rates influenced age-period-cohort effects. The overall prevalence of chronic hypertension was 0.63%, with black women (1.24%) having more than a 2-fold higher rate than white women (0.53%; rate ratio, 2.31; 95% CI, 2.30–2.32). In the age-period-cohort analysis, the rate of chronic hypertension increased sharply with advancing age and period from 0.11% in 1970 to 1.52% in 2010 (rate ratio, 13.41; 95% CI, 13.22–13.61). The rate of hypertension increased, on average, by 6% (95% CI, 5–6) per year, with the increase being slightly higher among white (7%; 95% CI, 6%–7%) than black (4%; 95% CI, 3%–4%) women. Adjustments for changes in rates of obesity and smoking were not associated with age and period effects. We observed a substantial increase in chronic hypertension rates by age and period and an over 2-fold race disparity in chronic hypertension rates.

Systematic Review of Chronic Discrimination and Changes in Biology During Pregnancy Among African American Women

Profound racial health disparities in maternal and infant health exist in the USA. Discrimination based on race may contribute to these disparities, but the biological pathways through which racial discrimination acts on health are not fully known. Even less is known about these pathways during development. Examining how racial discrimination becomes biology is paramount because it may shed light on how and when such social forces result in lasting biological consequences for health and wellbeing. To begin exploring this issue, we performed a systematic review of the relationships between experiences of chronic racial discrimination and relevant biomarkers measured during pregnancy among African American women. The literature search included studies published prior to August 2018 in the MEDLINE, Embase, and PsycINFO databases, and 11 studies met our inclusion criteria. We evaluated the articles based on the biological system that the authors investigated, which included the immune, neuroendocrine, and cardiovascular systems. We found that the current literature provides preliminary evidence that experiences of chronic racial discrimination are associated with changes in maternal biology during pregnancy. However, the literature was limited in both quantity and quality. We found only 11 studies that addressed this subject, four of which only provided indirect evidence, and many studies had small sample sizes. Future work in this area should develop more informative methods that consider the interaction between interpersonal and structural racial discrimination, individual variation, and sociocultural factors. We conclude researchers should continue to work in this area and focus on developing more effective study designs and larger sample sizes.

The Role of Immigration in the Health of Lesbian, Gay, Bisexual, and Transgender Older Adults in the United States

Lesbian, gay, bisexual, and transgender (LGBT) aging research is growing around the globe. Yet, few studies have examined the interconnectedness of different populations and cultures. This study examines whether LGBT foreign-born older adults experience greater health disparities than their U.S.-born counterparts. We conducted a cross-sectional analysis of the National Health, Aging, and Sexuality/Gender Study: Aging with Pride from 2014, which assessed measures of health and well-being among LGBT adults aged 50 years and older (n =2,441). We compared sociodemographic characteristics, health-care access, health behaviors, and health outcomes between foreign-born and U.S.-born participants. Foreign-born LGBT older adults reported greater socioeconomic disadvantage and higher levels of experiencing barriers to health-care access than U.S.-born LGBT older adults. Groups did not significantly differ in health behaviors and health outcomes when controlling for sociodemographic factors. Greater understanding of the mechanisms that shape the relationship between migration and health among the LGBT population is warranted.

Risk Factors, Imaging Findings, and Sex Differences in Spontaneous Coronary Artery Dissection

Spontaneous coronary artery dissection (SCAD) is increasingly being recognized. However, data supporting diagnosis and management are scarce. We analyze a contemporary and comprehensive SCAD registry to advance the understanding of SCAD risk factors, angiographic appearance, and gender differences. This is a retrospective analysis of a prospectively populated database of SCAD patients seen at the Massachusetts General Hospital (MGH) between June 2013 and October 2017. Core laboratory analysis of both coronary angiograms and computerized tomographic (CT) angiography of the extracoronary vessels was performed. Of the 113 patients, 87% were female and mean age was 47 ± 10 years. Traditional cardiovascular risk factors including hypertension, hyperlipidemia, and smoking were present in 27%, 14%, and 22% of patients. Among females, 14%, 8%, and 9% had a history of gestational hypertension, pre-eclampsia, and gestational diabetes, respectively. Fifteen percent had used fertility treatment and 47% of postmenopausal women had used hormone replacement therapy. Angiography showed multivessel SCAD in 42%, severe coronary artery tortuosity in 59%, and extracoronary vascular abnormalities in 100% of patients with complete CT angiographic imaging. Gender differences revealed a self-reported depression and anxiety prevalence of 20% and 32%, respectively, in women compared with 0% in men. Type 1 SCAD was more commonly diagnosed in men than women (71% vs 29%, p <0.01). In conclusion, we highlight under-recognized features of SCAD including (1) relation with pregnancy complications and exposure to hormonal therapy; (2) diffuse, multivessel process in tortuous coronaries on a background of extracoronary arterial abnormalities; and (3) gender differences highlighting the role of mental health as well as potential underdiagnoses in men.

Infant Mortality in the United States, 1915-2017: Large Social Inequalities have Persisted for Over a Century

OBJECTIVES

We examined trends in racial/ethnic, socioeconomic, and geographic disparities in age- and cause-specific infant mortality in the United States during 1915-2017.

METHODS

Log-linear regression and inequality indices were used to analyze temporal infant mortality data from the National Vital Statistics System and the National Linked Birth/Infant Death files according to maternal and infant characteristics.

RESULTS

During 1915-2017, the infant mortality rate (IMR) declined dramatically overall and for black and white infants; however, black/white disparities in mortality generally increased through 2000. Racial disparities were greater in post-neonatal mortality than neonatal mortality. Detailed racial/ethnic comparisons show an approximately five-fold difference in IMR, ranging from a low of 2.3 infant deaths per 1,000 live births for Chinese infants to a high of 8.5 for American Indian/Alaska Natives and 11.2 for black infants. Infant mortality from major causes of death showed a downward trend during the past 5 decades although there was a recent upturn in mortality from prematurity/low birthweight and unintentional injury. In 2016, black infants had 2.5-2.8 times higher risk of mortality from perinatal conditions, sudden infant death syndrome, influenza/pneumonia, and unintentional injuries, and 1.3 times higher risk of mortality from birth defects compared to white infants. Educational disparities in infant mortality widened between 1986 and 2016; mothers with less than a high school education in 2016 experienced 2.4, 1.9, and 3.7 times higher risk of infant, neonatal, and post-neonatal mortality than those with a college degree. Geographic disparities were marked and widened across regions, with states in the Southeast region having higher IMRs.

CONCLUSIONS AND GLOBAL HEALTH IMPLICATIONS

Social inequalities in infant mortality have persisted and remained marked, with the disadvantaged ethnic and socioeconomic groups and geographic areas experiencing substantially increased risks of mortality despite the declining trend in mortality over time. Widening social inequalities in infant mortality are a major factor contributing to the worsening international standing of the United States.