The impact of the State Children's Health Insurance Program's unborn child ruling expansions on foreign-born Latina prenatal care and birth outcomes, 2000-2007

Do studies evaluating early-life policy interventions fully adhere to the critical conditions of difference-in-differences? A systematic review

OBJECTIVES

To assess the reporting and methodological quality of early-life policy intervention papers that applied difference-in-differences (DiD) analysis.

STUDY DESIGN

Systematic review.

DATA SOURCES

Papers applying DiD of early-life policy interventions in high-income countries as identified by searching Medline, Embase and Scopus databases up to December, 2022.

STUDY ELIGIBILITY CRITERIA, PARTICIPANTS AND INTERVENTIONS

Studies evaluating policy interventions targeting expectant mothers, infants or children up to two years old and conducted in high income countries were included. We focused on seven critical conditions of DiD as proposed in a comprehensive checklist: data requirements, parallel trends, no-anticipation, standard statistical assumptions, common shocks, group composition and spillover.

RESULTS

The DiD included studies (n=19) evaluating early-life policy interventions in childhood development (n=4), healthcare utilisation and providers (n=4), nutrition programmes (n=3) and economic policies such as prenatal care expansion (n=8). Although none of the included studies met all critical conditions, the most reported and adhered to critical conditions were data requirements (n=18), standard statistical assumptions (n=11) and the parallel trends assumption (n=9). No-anticipation and spillover were explicitly reported and adhered to in two studies and one study, respectively.

CONCLUSIONS

This review highlights current deficiencies in the reporting and methodological quality of studies using DiD to evaluate early-life policy interventions. As the validity of study conclusions and consequent implications for policy depend on the extent to which critical conditions are met, this shortcoming is concerning. We recommend that researchers use the described checklist to improve the transparency and validity of their evaluations. The checklist should be further refined by adding order of importance or knock-out criteria and may also help facilitate uniform terminology. This will hopefully encourage reliable DiD evaluations and thus contribute to better policies relating to expectant mothers, infants and children.

Extending Driver's Licenses to Undocumented Immigrants: Comparing Perinatal Outcomes Following This Policy Shift

Research shows that restrictive immigration policies and practices are associated with poor health, but far less is known about the relationship between inclusive immigration policies and health. Using data from the United States natality files, we estimate associations between state laws granting undocumented immigrants access to driver's licenses and perinatal outcomes among 4,047,067 singleton births to Mexican and Central American immigrant birthing people (2008-2021). Fitting multivariable log binomial and linear models, we find that the implementation of a license law is associated with improvements in low birthweight and mean birthweight. Replicating these analyses among U.S.-born non-Hispanic White birthing people, we find no association between the implementation of a license law and birthweight. These findings support the hypothesis that states' extension of legal rights to immigrants improves the health of the next generation.

The association of maternal country/region of origin and nativity with infant mortality rate among Hispanic preterm infants

OBJECTIVES

Among US-born preterm infants of Hispanic mothers, we analyzed the unadjusted and adjusted infant mortality rate (IMR) by country/region of origin and maternal nativity status.

STUDY DESIGN

Using linked national US birth and death certificate data (2005-2014), we examined preterm infants of Hispanic mothers by subgroup and nativity. Clinical and sociodemographic covariates were included and the main outcome was death in the first year of life.

RESULTS

In our cohort of 891,216 preterm Hispanic infants, we demonstrated different rates of infant mortality by country and region of origin, but no difference between infants of Hispanic mothers who were US vs. foreign-born.

CONCLUSION

These findings highlight the need to disaggregate the heterogenous Hispanic birthing population into regional and national origin groups to better understand unique factors associated with adverse perinatal outcomes in order to develop more targeted interventions for these subgroups.

Uninsured immigrants in the United States significantly delayed the initiation of prenatal care after the changes to the Public Charge Rule

OBJECTIVE

We estimated the impact of the changes made to the Public Charge Rule on the initiation of prenatal care among uninsured immigrants in the United States.

STUDY DESIGN

We used a difference-in-differences approach to analyse the impact of the changes made to the Public Charge Rule (first difference) on initiation of prenatal care between uninsured and privately insured immigrants (second difference).

METHODS

We used the natality data by the National Center for Health Statistics as the main data source, which includes all singleton births in a hospital to an immigrant birthing person aged from 15 to 44. The study covers three phases: (1) the period prior to the leaked draft Executive Orders concerning changes made to the public charge policy-from January 2014 to December 2016; (2) the period after the draft Executive Orders were leaked until the proposal of the Public Charge Rule-from January 2017 to September 2018; and (3) post proposal of the Public Charge Rule -from October 2018 to December 2019.

RESULTS

After the proposal of the Public Charge Rule in 2018, the odds of initiating prenatal care in the first trimester decreased among uninsured immigrants by 12% (odds ratio [OR]: 0.880; 95% confidence interval [CI]: 0.832, 0.931) compared to privately insured immigrants. The odds of second trimester initiation of prenatal care was also negatively associated with the leak of the draft Executive Orders (OR: 0.942; 95% CI: 0.905, 0.981).

CONCLUSION

The results of this study suggest that uninsured immigrants in the United States significantly delayed prenatal care after the changes were made to the Public Charge Rule.

A realist synthesis to develop an explanatory model of how policy instruments impact child and maternal health outcomes

BACKGROUND

Child and maternal health, a key marker of overall health system performance, is a policy priority area by the World Health Organization and the United Nations, including the Sustainable Development Goals. Previous realist work has linked child and maternal health outcomes to globalization, political tradition, and the welfare state. It is important to explore the role of other key policy-related factors. This paper presents a realist synthesis, categorising policy instruments according to the established NATO model, to develop an explanatory model of how policy instruments impact child and maternal health outcomes.

METHODS

A systematic literature search was conducted to identify studies assessing the relationships between policy instruments and child and maternal health outcomes. Data were analysed using a realist framework. The first stage of the realist analysis process was to generate micro-theoretical initial programme theories for use in the theory adjudication process. Proposed theories were then adjudicated iteratively to produce a set of final programme theories.

FINDINGS

From a total of 43,415 unique records, 632 records proceeded to full-text screening and 138 papers were included in the review. Evidence from 132 studies was available to address this research question. Studies were published from 1995 to 2021; 76% assessed a single country, and 81% analysed data at the ecological level. Eighty-eight initial candidate programme theories were generated. Following theory adjudication, five final programme theories were supported. According to the NATO model, these were related to treasure, organisation, authority-treasure, and treasure-organisation instrument types.

CONCLUSIONS

This paper presents a realist synthesis to develop an explanatory model of how policy instruments impact child and maternal health outcomes from a large, systematically identified international body of evidence. Five final programme theories were supported, showing how policy instruments play an important yet context-dependent role in influencing child and maternal health outcomes.

Analysis of State Medicaid Expansion and Access to Timely Prenatal Care Among Women Who Were Immigrant vs US Born

IMPORTANCE

Disparities exist in access to timely prenatal care between immigrant women and US-born women. Exclusions from Medicaid eligibility based on immigration status may exacerbate disparities.

OBJECTIVE

To examine changes in timely prenatal care by nativity after Medicaid expansion.

DESIGN, SETTING, AND PARTICIPANTS

A cross-sectional difference-in-differences (DID) and triple-difference analysis of 22 042 624 singleton births from January 1, 2011, to December 31, 2019, in 31 states was conducted using US natality data. Data analysis was performed from February 1, 2021, to August 24, 2022.

EXPOSURES

Within 16 states that expanded Medicaid in 2014, the rate of timely prenatal care by nativity in years after expansion was compared with the rate in the years before expansion. Similar comparisons were conducted in 15 states that did not expand Medicaid and tested across expansion vs nonexpansion states.

MAIN OUTCOMES AND MEASURES

Timely prenatal care was categorized as prenatal care initiated in the first trimester. Individual-level covariates included age, parity, race and ethnicity, and educational level. State-level time-varying covariates included unemployment, poverty, and Immigrant Climate Index.

RESULTS

A total of 5 390 814 women preexpansion and 6 544 992 women postexpansion were included. At baseline in expansion states, among immigrant women, 413 479 (27.3%) were Asian, 110 829 (7.3%) were Black, 752 176 (49.6%) were Hispanic, and 238 746 (15.8%) were White. Among US-born women, 96 807 (2.5%) were Asian, 470 128 (12.1%) were Black, 699 776 (18.1%) were Hispanic, and 2 608 873 (67.3%) were White. Prenatal care was timely in 75.9% of immigrant women vs 79.9% of those who were US born in expansion states at baseline. After Medicaid expansion, the immigrant vs US-born disparity in timely prenatal care was similar to the preexpansion level (DID, -0.91; 95% CI, -1.91 to 0.09). Stratifying by race and ethnicity showed an increase in the Asian vs White disparity after expansion, with 1.53 per 100 fewer immigrant women than those who were US born accessing timely prenatal care (95% CI, -2.31 to -0.75), and in the Hispanic vs White disparity (DID, -1.18 per 100; 95% CI, -2.07 to -0.30). These differences were more pronounced among women with a high school education or less (DID for Asian women, -2.98; 95% CI, -4.45 to -1.51; DID for Hispanic women, -1.47; 95% CI, -2.48 to -0.46). Compared with nonexpansion states, differences in DID estimates were found among Hispanic women with a high school education or less (triple-difference, -1.86 per 100 additional women in expansion states who would not receive timely prenatal care; 95% CI, -3.31 to -0.42).

CONCLUSIONS AND RELEVANCE

The findings of this study suggest that exclusions from Medicaid eligibility based on immigration status may be associated with increased health care disparities among some immigrant groups. This finding has relevance to current policy debates regarding Medicaid coverage during and outside of pregnancy.

Publicly-Funded Services Providing Sexual, Reproductive, and Maternal Healthcare to Immigrant Women in the United States: A Systematic Review

Sexual, reproductive, and maternal health (SRMH) care in the US is highly politicized, with restrictions that impede immigrant women's health. This review describes SRMH outcomes among immigrant women accessing publicly-funded services. We examined articles published from December 2007 to August 2020 in PubMed, PsycINFO, and Web of Science databases, following PRISMA guidelines. Included articles (n = 9) consisted of predominantly Latina immigrant samples. The majority included a subsample of women classified as vulnerable due to low income, low educational attainment, and/or documentation status. Our search strategy included a range of SRMH outcomes; however, the majority of articles focused on prenatal care (PNC). Over half of the articles revealed that underserved immigrant women with access to Medicaid/CHIP during expansion had higher rates of PNC adequacy compared to those without access. There is a need for more research on the impact of publicly-funded services other than Medicaid on outcomes beyond PNC.

Federal, State, and Local Immigrant-Related Policies and Child Health Outcomes: a Systematic Review

The passage of US immigrant-related policies at the federal, state, and local level is on the rise. These policies may affect child health through several mechanisms. We performed a systematic review of English-language, peer-reviewed, quantitative studies examining US immigrant-related policies and the mental and physical health of youth in immigrant families. We searched PubMed and five social science databases for studies published between 1986 and 2019. Two independent reviewers screened the studies and appraised study quality. Of the final 17 studies, ten studies examined birth outcomes and seven studies examined other outcomes in childhood and adolescence (e.g., self-rated health). Generally, exclusionary policies were associated with worse health outcomes and inclusive policies were associated with better health outcomes. Several studies did not observe an association, but only one study found an association of the opposite direction. In that study, similar trends in different policy environments and across foreign-born and US-born women suggest alternative causes for the observed association. Overall, we find that exclusionary policies are, at best, neutral, but likely harmful towards child wellbeing, while inclusive policies can be beneficial.

State-Level Immigrant Prenatal Health Care Policy and Inequities in Health Insurance Among Children in Mixed-Status Families

Children in immigrant families are twice as likely to be uninsured as their counterparts, and states may influence these inequities by facilitating or restricting immigrant families' access to coverage. Our objective was to measure differences in insurance by mother's documentation status among a nationally representative sample of US-born children in immigrant families and to examine the role of state-level immigrant health care policy-namely, state-level immigrant access to prenatal coverage. Compared with US-born children in immigrant families with citizen mothers, children with undocumented immigrant mothers had a 17.0 percentage point (P < .001) higher uninsurance rate (8.8 percentage points higher in adjusted models, P < .05). However, in states with nonrestrictive prenatal coverage for immigrants, there were no differences in children's insurance by mother's documentation status, while large inequities were observed within states with restrictive policies. Our findings demonstrate the potential for state-level immigrant health care policy to mitigate or exacerbate inequities in children's insurance.

Oregon's Expansion of Prenatal Care Improved Utilization Among Immigrant Women

Objectives To determine whether expanding Emergency Medicaid to cover prenatal care in Oregon affected maternal health outcomes for unauthorized immigrants. Methods This study takes place in Oregon from 2003 to 2015 and includes all Emergency Medicaid and Medicaid claims for women aged 12-51 with a pregnancy related claim. To isolate the effect of expanding access to prenatal care, we utilized a difference-in-differences approach that exploits the staggered rollout of the prenatal care program. The primary outcome was a composite measure of severe maternal morbidity and mortality. Additional outcomes include adequacy of prenatal care, detection of pregnancy complications and birth outcomes. Results A total of 213,746 pregnancies were included, with 35,182 covered by Emergency Medicaid, 12,510 covered by Emergency Medicaid Plus (with prenatal care), and 166,054 covered by standard Medicaid. Emergency Medicaid Plus coverage did not affect severe maternal morbidity (all pregnancies 0.05%, CI - 0.29; 0.39; high-risk pregnancies 2.20%, CI - 0.47; 4.88). The program did reduce inadequate care among all pregnancies (- 31.75%, 95% CI - 34.47; - 29.02) and among high risk pregnancies (- 38.60%, CI - 44.17; - 33.02) and increased diagnosis of gestational diabetes (6.24%, CI 4.36; 8.13; high risk pregnancies 10.48%, CI 5.87; 15.08), and poor fetal growth (7.37%, CI 5.69; 9.05; high risk pregnancies 5.34%, CI 1.00; 9.68). The program also increased diagnosis of pre-existing diabetes mellitus (all pregnancies 2.93%, CI 2.16; 3.69), hypertensive diseases of pregnancy (all pregnancies 1.28%, CI 0.52; 2.04) and a history of preterm birth (all pregnancies 0.87%, CI 0.27; 1.47). Conclusions for Practice Oregon's prenatal care expansion program produced positive effects for unauthorized immigrant women and their children.

Policies of Exclusion: Implications for the Health of Immigrants and Their Children

Public policies play a crucial role in shaping how immigrants adapt to life in the United States. Federal, state, and local laws and administrative practices impact immigrants' access to education, health insurance and medical care, cash assistance, food assistance, and other vital services. Additionally, immigration enforcement activities have substantial effects on immigrants' health and participation in public programs, as well as effects on immigrants' families. This review summarizes the growing literature on the consequences of public policies for immigrants' health. Some policies are inclusive and promote immigrants' adaptation to the United States, whereas other policies are exclusionary and restrict immigrants' access to public programs as well as educational and economic opportunities. We explore the strategies that researchers have employed to tease out these effects, the methodological challenges of undertaking such studies, their varying impacts on immigrant health, and steps that can be undertaken to improve the health of immigrants and their families.

Public Health Insurance and Health Care Utilization for Children in Immigrant Families

Objectives To estimate the impacts of public health insurance coverage on health care utilization and unmet health care needs for children in immigrant families. Methods We use survey data from National Health Interview Survey (NHIS) (2001-2005) linked to data from Medical Expenditures Panel Survey (MEPS) (2003-2007) for children with siblings in families headed by at least one immigrant parent. We use logit models with family fixed effects. Results Compared to their siblings with public insurance, uninsured children in immigrant families have higher odds of having no usual source of care, having no health care visits in a 2 year period, having high Emergency Department reliance, and having unmet health care needs. We find no statistically significant difference in the odds of having annual well-child visits. Conclusions for practice Previous research may have underestimated the impact of public health insurance for children in immigrant families. Children in immigrant families would likely benefit considerably from expansions of public health insurance eligibility to cover all children, including children without citizenship. Immigrant families that include both insured and uninsured children may benefit from additional referral and outreach efforts from health care providers to ensure that uninsured children have the same access to health care as their publicly-insured siblings.

State And Federal Coverage For Pregnant Immigrants: Prenatal Care Increased, No Change Detected For Infant Health

Expanded health insurance coverage for pregnant immigrant women who are in the United States lawfully as well as those who are in the country without documentation may address barriers in access to pregnancy-related care. We present new evidence on the impact of states' public health insurance expansions for pregnant immigrant women (both state-funded and expansions under the Children's Health Insurance Program) on their prenatal care use, mode of delivery, and infant health. Our quasi-experimental design compared changes in immigrant women's outcomes in states expanding coverage to changes in outcomes for nonimmigrant women in the same state and to women in nonexpanding states. We found that prenatal care use increased among all immigrant women following coverage expansion and that cesarean section increased among immigrant women with less than a high school diploma. We found no effects on the incidence of low birthweight, preterm birth, being small for gestational age, or infant death. State public insurance programs that cover pregnant immigrant women appear to have improved prenatal care utilization without observable changes in infant health or mortality.

Expanding Prenatal Care to Unauthorized Immigrant Women and the Effects on Infant Health

OBJECTIVE

To measure the effect of access to prenatal care on unauthorized and low-income, new legal permanent resident immigrant women and their offspring.

METHODS

We used a difference-in-differences design that leverages the staggered rollout of Emergency Medicaid Plus by county from 2008 to 2013 as a natural experiment to estimate the effect on health service utilization for women and health outcomes for their infants. Regular Medicaid pregnancies were used as an additional control in a triple difference design.

RESULTS

Our sample included pregnancies covered by Emergency Medicaid (35,182), Emergency Medicaid Plus (12,510), and Medicaid (166,054). After expansion of access to prenatal care, there was an increase in prenatal visits (7.2 more visits, 95% CI 6.45-7.96), receipt of adequate prenatal care (28% increased rate, CI 26-31), rates of diabetes screening (61% increased rate, CI 56-66), and fetal ultrasonograms (74% increased rate, CI 72-76). Maternal access to prenatal care was also associated with an increased number of well child visits (0.24 more visits, CI 0.07-0.41), increased rates of recommended screenings and vaccines (0.04 increased probability, CI 0.002-0.074), and reduced infant mortality (-1.01/1,000, CI -1.42 to -0.60) and rates of extremely low birth weight (less than 1,000 g) (-1.33/1,000, CI -2.44 to -0.21).

CONCLUSION

Our results provide evidence of increased utilization and improved health outcomes for unauthorized immigrants and their children who are U.S. citizens after introduction of prenatal care expansion in Oregon. This study contributes to the debate around reauthorization of the Children's Health Insurance Program in 2017.

Food Insecurity and Cardiovascular Health in Pregnant Women: Results From the Food for Families Program, Chelsea, Massachusetts, 2013-2015

BACKGROUND

Food insecurity, uncertainty about the ability to acquire adequate food, is associated with cardiometabolic disease in pregnant women. Whether food insecurity interventions improve cardiometabolic health is unknown.

METHODS

We conducted a retrospective analysis of women who visited the obstetrics clinic in a community health center from 2013 through 2015. Patients could be referred to the Food for Families (Food for Families) program, which connects food insecure women to food resources. We hypothesized that participation in Food for Families would be associated with better blood pressure and blood glucose trends during pregnancy. We used a propensity score-matched design to reduce bias from differential entry into Food for Families.

RESULTS

Eleven percent of women who visited the obstetrics clinic were referred to Food for Families. In propensity score-matched analyses, we found no difference in baseline systolic blood pressure (SBP) between those who were referred and enrolled in Food for Families (113.5 mm Hg), those who were referred and did not enroll in Food for Families (113.9 mm Hg), and those who were not referred to Food for Families (114 mm Hg) (P = .79). However, during pregnancy, women who were referred to and enrolled in Food for Families had a better SBP trend (0.2015 mm Hg/wk lower, P = .006). SBP trends did not differ between women who were referred and did not enroll in Food for Families and those who were not referred. We observed no differences in blood glucose trends between groups (P = .40).

CONCLUSIONS

Food for Families participation was associated with better blood pressure trends in pregnant women but no differences in blood glucose trends. Food insecurity reduction programs may improve cardiovascular health for vulnerable pregnant women, and this topic deserves further study incorporating randomized program entry.