Impacts of Medicaid Expansion Before Conception on Prepregnancy Health, Pregnancy Health, and Outcomes.

Preconception health care is heralded as an essential method of improving pregnancy health and outcomes. However, access to health care for low-income US women of reproductive age has been limited because of a lack of health insurance. Expansions of Medicaid program eligibility under the Affordable Care Act (as well as prior expansions in some states) have changed this circumstance and expanded health insurance coverage for low-income women. These Medicaid expansions provide an opportunity to assess whether obtaining health insurance coverage improves prepregnancy and pregnancy health and reduces prevalence of adverse pregnancy outcomes. We tested this hypothesis using vital statistics data from 2011-2017 on singleton births to female US residents aged 15-44 years. We examined associations between preconception exposure to Medicaid expansion and measures of prepregnancy health, pregnancy health, and pregnancy outcomes using a difference-in-differences empirical approach. Increased Medicaid eligibility was not associated with improvements in prepregnancy or pregnancy health measures and did not reduce the prevalence of adverse birth outcomes (e.g., prevalence of preterm birth increased by 0.1 percentage point (95% confidence interval: -0.2, 0.3)). Increasing Medicaid eligibility alone may be insufficient to improve prepregnancy or pregnancy health and birth outcomes. Preconception programming in combination with attention to other structural determinants of pregnancy health is needed.

Long-Term Implications of Post-ACA Health Reform on State Health Care Policy.

In the midst of the COVID-19 outbreak, health care reform has again taken a major role in the 2020 election, with Democrats weighing Medicare for All against extensions of the Affordable Care Act, while Republicans quietly seem to favor proposals that would eliminate much of the ACA and cut Medicaid. Although states play a major role in health care funding and administration, public and scholarly debates over these proposals have generally not addressed the potential disruption that reform proposals might create for the current state role in health care. We examine how potential reforms influence state-federal relations, and how outside factors like partisanship and exogenous shocks like the COVID-19 pandemic interact with underlying preferences of each level of government. All else equal, reforms that expand the ACA within its current framework would provide the least disruption for current arrangements and allow for smoother transitions for providers and patients, rather than the more radical restructuring proposed by Medicare for All or the cuts embodied in Republican plans.

Impact of Medicaid expansion on women with gynecologic cancer: a difference-in-difference analysis.

BACKGROUND: Women with gynecologic cancer face socioeconomic disparities in care that affect survival outcomes. The Affordable Care Act offered states the option to expand Medicaid enrollment eligibility criteria as a means of improving timely and affordable access to care for the most vulnerable. The variable uptake of expansion by states created a natural experiment, allowing for quasi-experimental methods that offer more unbiased estimates of treatment effects from retrospective data than the traditional regression adjustment. OBJECTIVE: To use a quasi-experimental, difference-in-difference framework to create unbiased estimates of impact of Medicaid expansion on women with gynecologic cancer. STUDY DESIGN: We performed a quasi-experimental retrospective cohort study from the National Cancer Database files for women with invasive cancers of the uterus, ovary and fallopian tube, cervix, vagina, and vulva diagnosed from 2008 to 2016. Using a marker for state Medicaid expansion status, we created difference-in-difference models to assess the impact of Medicaid expansion on the outcomes of access to and timeliness of care. We excluded women aged <40 years owing to the suppression of the state Medicaid expansions status in the data and women aged ≥65 years owing to the universal Medicare coverage availability. Our primary outcome was the rate of uninsurance at diagnosis. Secondary outcomes included Medicaid coverage, early-stage diagnosis, treatment at an academic facility, and any treatment or surgery within 30 days of diagnosis. Models were run within multiple subgroups and on a propensity-matched cohort to assess the robustness of the treatment estimates. The assumption of parallel trends was assessed with event study time plots. RESULTS: Our sample included 335,063 women. Among this cohort, 121,449 were from nonexpansion states and 213,614 were from expansion states, with 79,886 posttreatment cases diagnosed after the expansion took full effect in expansion states. The groups had minor differences in demographics, and we found occasional preperiod event study coefficients diverging from the mean, but the outcome trends were generally similar between the expansion and nonexpansion states in the preperiod, satisfying the necessary assumption for the difference-in-difference analysis. In a basic difference-in-difference model, the Medicaid expansion in January 2014 was associated with significant increases in insurance at diagnosis, treatment at an academic facility, and treatment within 30 days of diagnosis (P<.001 for all). In an adjusted model including all states and accounting for variable expansion implementation time, there was a significant treatment effect of Medicaid expansion on the reduction in uninsurance at diagnosis (-2.00%; 95% confidence interval, -2.3 to -1.7; P<.001), increases in early-stage diagnosis (0.80%; 95% confidence interval, 0.2-1.4; P=.02), treatment at an academic facility (0.83%; 95% confidence interval, 0.1-1.5; P=.02), treatment within 30 days (1.62%; 95% confidence interval, 1.0-2.3; P<.001), and surgery within 30 days (1.54%; 95% confidence interval, 0.8-2.3; P<.001). In particular, large gains were estimated for women living in low-income zip codes, Hispanic women, and women with cervical cancer. Estimates from the subgroup and propensity-matched cohorts were generally consistent for all outcomes besides early-stage diagnosis and treatment within 30 days. CONCLUSION: Medicaid expansion was significantly associated with gains in the access and timeliness of treatment for nonelderly women with gynecologic cancer. The implementation of Medicaid expansion could greatly benefit women in nonexpansion states. Gynecologists and gynecologic oncologists should advocate for Medicaid expansion as a means of improving outcomes and reducing socioeconomic and racial disparities.

The Affordable Care Act at 10 Years: Evaluating the Evidence and Navigating an Uncertain Future.

The year 2020 marks the 10th anniversary of the signing of the Affordable Care Act (ACA). Perhaps the greatest overhaul of the US health care system in the past 50 y, the ACA sought to expand access to care, improve quality, and reduce health care costs. Over the past decade, there have been a number of challenges and changes to the law, which remains in evolution. While the ACA's policies were not intended to specifically target surgical care, surgical patients, surgeons, and the health systems within which they function have all been greatly affected. This article aims to provide a brief overview of the impact of the ACA on surgical patients in reference to its tripartite aim of improving access, improving quality, and reducing costs.

Refinement of the Affordable Care Act.

Regardless of what legislation the federal government adopts to address health insurance coverage for nonelderly Americans, private insurance will likely play a major role. This article begins by listing some of the major reasons critics dislike the Affordable Care Act (ACA), then discusses the validity of these concerns from an economics perspective. Criticisms of the ACA include the increased role of government in health care, the ACA's implicit income redistribution, and concern about high and rising insurance premiums. Suggestions for refining the ACA and its market-based insurance system are then offered, with the goals of lowering insurance premiums, improving coverage rates, and/or addressing the concerns of ACA critics. Americans favor the increase in insurance coverage that has occurred under the ACA. In order to sustain this level of coverage, steps to lower Marketplace premiums through a variety of strategies affecting potential enrollees, insurers, and healthcare providers are offered.

Implementation of the Affordable Care Act: A Comparison of Outcomes in Patients With Severe Sepsis and Septic Shock Using the National Inpatient Sample.

OBJECTIVES: Sepsis is the most common and costly diagnosis in U.S.' hospitals. Despite quality improvement programs and heightened awareness, sepsis accounts for greater than 50% of all hospital deaths. A key modifier of outcomes is access to healthcare. The Affordable Care Act, passed in 2010, expanded access to health insurance coverage. The purpose of this study was to evaluate changes in insurance coverage and outcomes in patients with severe sepsis and septic shock as a result of the full implementation of the Affordable Care Act. DESIGN: This retrospective study uses data from the Healthcare Cost and Utilization Project National Inpatient Sample during 2011-2016. Data were divided into two groups: 2011-2013 (pre Affordable Care Act) and 2014-2016 (post Affordable Care Act). Outcomes were in-hospital mortality, mortality rates based on insurance type, and hospital length of stay. PATIENTS: Hospitalized adults between the ages 18 and 64. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: A total of 361,323 severe sepsis or septic shock hospital discharges were included. Comparing pre-Affordable Care Act with post-Affordable Care Act, there was a 4.75% increase in medicaid coverage and a 1.91% decrease in the uninsured. Overall in-hospital mortality decreased from 22.90% pre-Affordable Care Act to 18.59% post-Affordable Care Act. Pre-Affordable Care Act uninsured patients had the highest mortality (25.68%). Patients with medicaid had the greatest reduction in mortality (5.71%) and length of stay (2.45 d). The mean (SD) length of stay pre Affordable Care Act was 13.92 (17.42) days, compared with 12.35 (15.76) days post Affordable Care Act. All results were statistically significant (p < 0.0001). CONCLUSIONS: In this cohort, there was an increase in insured patients with severe sepsis and septic shock post Affordable Care Act. Mortality and length of stay decreased in the post-Affordable Care Act period with the greatest reduction identified in the medicaid population. The improvement in outcomes could be attributed to advances in management, earlier presentation, patients being less severely ill and receiving treatment sooner.

Incorporating Prescription Drugs Into Affordable Care Act Risk Adjustment.

BACKGROUND: The 2010 Patient Protection and Affordable Care Act reformed the individual and small group health insurance markets and established a risk adjustment program to create a level playing field for competition. A new set of predictive models for measuring enrollee risk across plans was developed for the Patient Protection and Affordable Care Act-reformed markets, referred to as the Department of Health and Human Services Hierarchical Condition Category (HHS-HCC) models. Beginning in 2018, selected prescription drug classes were added to the models as risk markers. OBJECTIVE: We describe the motivations, concerns, methodology, and results of adding prescription drug utilization to the HHS-HCC models. METHODS: Separate HHS-HCC models are estimated by enrollee age and plan actuarial value. We defined and added 10 prescription drug classes, called RXCs, to the HHS-HCC adult models. RESULTS: Using selected RXCs alongside demographic and diagnostic indicators yielded modest overall improvement in HHS-HCC models' predictive power. Also, adding RXCs captures the higher costs of enrollees taking certain expensive pharmaceuticals and allows imputation of diagnoses for enrollees utilizing a drug but lacking the associated diagnosis. CONCLUSIONS: Including selected drugs in risk adjustment improved the models' predictive power. In addition, inclusion of selected drugs may discourage insurers from using formulary and drug benefit design to avoid enrollment of patients taking high-cost drugs, such as for HIV, multiple sclerosis, and rheumatoid arthritis, and improve access for enrollees taking these drugs. Adding RXCs also may improve plan risk measurement for plans with less complete diagnosis reporting.

Higher Rates of Preventive Health Care With Commercial Insurance Compared With Medicaid: Findings From the Arkansas Health Care Independence "Private Option" Program.

BACKGROUND: A requirement of the Arkansas Medicaid Section 1115 demonstration waiver was to evaluate the level of care received for Medicaid expansion eligible beneficiaries enrolled in commercial Qualified Health Plans (QHPs) in the Health Care Independence "Private Option" Program. This allowed for a direct comparison of Medicaid and commercial system performance serving similar newly covered adults. RESEARCH DESIGN: In 2014, assignment to either Medicaid or a QHP was made based upon a psychometrically derived continuous composite score to exceptional health care needs assessment screener using a sharp a priori threshold cutpoint. Using a regression discontinuity design we compared preventive care (flu vaccination and screening rates) services in the 2 programs over 3 years. RESULTS: Compared with Medicaid enrollees, a higher percentage of QHP enrollees consistently received eligible preventive care screenings with 15.3, and 6.9% more receiving at least 1 or all eligible screenings, respectively. For individual preventive care outcomes and compared with Medicaid enrollees over the 3 years under study, a higher percentage of eligible QHP enrollees received a flu shot, cholesterol screenings, glycated hemoglobin assessment, and cervical and breast cancer periodic assessments. No differences were found for colorectal periodic assessments. CONCLUSIONS: These findings suggest that at least for preventive services, the Medicaid federal equal access requirement is not being met for those within Medicaid fee-for-service coverage. This persisted across all 3 years of the program. Differential payment rates for services between Medicaid and QHPs are likely a major contributing factor.

A Comparison of Health Risk and Costs Across Private Insurance Markets.

BACKGROUND: The Patient Protection and Affordable Care Act (PPACA) established new parameters for the individual and small group health insurance markets starting in 2014. We study these 2 reformed markets by comparing health risk and costs to the more mature large employer market. STUDY DATA: For 2017, claims data for all enrollees in PPACA-compliant individual and small group market plans as well as claims data from a sample of large employer market enrollees. VARIABLES AND METHODOLOGY: Risk scores and total (unadjusted and risk-adjusted) per-member-per-month (PMPM) allowed charges. Differences across markets in enrollment duration, age, and geographic distribution are addressed. The analysis is descriptive. RESULTS: Compared with large employer market enrollees, health risk was 3% lower among PPACA small group market enrollees and 20% higher among PPACA individual market enrollees. After adjusting for differences in health risk, enrollees in the PPACA individual market had 27% lower PMPM allowed charges than enrollees in the large employer market and enrollees in the PPACA small group market had 12% lower PMPM allowed charges than enrollees in the large employer market. CONCLUSIONS: On average, the PPACA individual market enrolls sicker individuals than the 2 group markets. But this does not translate to higher health costs; in fact, enrollees in the PPACA individual market accumulate lower allowed charges than enrollees in the large employer market. Lower-income enrollees particularly accumulate lower allowed charges. Narrower networks and increased enrollee cost-sharing among individual market plans, though they may reduce the value of coverage, likely significantly reduce allowed charges.

The Impact of Medicaid Expansion for Adults Under the Affordable Care Act on Preventive Care for Children: Evidence From the Southern United States.

INTRODUCTION: The Affordable Care Act of 2010 expanded Medicaid to low-income adults at or below 138% of the Federal Poverty Level (FPL). The aim of this study was to examine if expanding Medicaid to adults had an impact on preventive health care utilization of children from low-income families (focusing on families with annual incomes 0%-99% and 100%-199% of the FPL). METHODS: This study used data from the 2016 and 2017 National Survey of Children's Health and a quasi-experimental difference-in-differences method. The dependent variable was the number of preventive care visits in the past year and the primary independent variable was the Medicaid expansion status of the state. Louisiana expanded Medicaid in 2016 (treatment group) and neighboring nonexpansion states of Texas and Mississippi constituted the control group. Differences in dependent variable were calculated between survey years 2016 and 2017. RESULTS: In Louisiana, the change in the predicted probability of at least 1 preventive care visit among children of ages 0-17 years, from 0% to 99% FPL families, was higher by 26 percentage points after Medicaid was expanded (2017 vs. 2016), as compared with the change in the predicted probability (2017 vs. 2016) of at least 1 preventive care visit among children of ages 0-17 years, from 0% to 99% FPL families in the nonexpansion states, Texas and Mississippi. CONCLUSIONS: Children in poverty residing in a Medicaid expansion state, Louisiana, had increased likelihood of having an annual preventive care visit after expansion of Medicaid eligibility under the Affordable Care Act, as compared with children in nonexpansion states. Thus, this study showed that the implications of the public health insurance expansion for adults were not limited to adult health outcomes, but extended to children's health care utilization.

Effects of State-level Medicaid Expansion on Veterans Health Administration Dual Enrollment and Utilization: Potential Implications for Future Coverage Expansions.

OBJECTIVE: The objective of this study was to examine how pre-Affordable Care Act (ACA) state-level Medicaid expansions affect dual enrollment and utilization of Veterans Health Administration (VA) and Medicaid-funded care. RESEARCH DESIGN: We employed difference-in-difference analysis to determine the association between pre-ACA Medicaid expansions in New York and Arizona in 2001 and VA utilization. Participants' dual enrollment in Medicaid and VA, the distribution of their annual hospital admissions and emergency department (ED) visits between VA and Medicaid were dependent variables. We controlled for age, race, sex, disease burden, distance to VA facilities and income-based eligibility for VA services. MEASURES: Secondary data collected from 1999 to 2006 in 2 states expanding Medicaid and 3 demographically similar nonexpansion states. We obtained residency, enrollment and utilization data from VA's Corporate Data Warehouse and Medicaid Analytic Extract files. RESULTS: For low-income Veterans, Medicaid expansion was associated with increased dual enrollment of 4.87 percentage points (99% confidence interval: 4.48-5.25), a 4.63-point decline in VA proportion of admissions (-5.87 to -3.38), and a 11.70-point decrease in the VA proportion of ED visits (-13.06 to -10.34). Results also showed increases in the number of total (VA plus Medicaid) annual per-capita hospitalizations and ED visits among the group of VA enrollees most likely to be eligible for expansion. CONCLUSIONS: This study shows slight usage shifts when Veterans gain access to non-VA care. It highlights the need to overcome care-coordination challenges among VA patients as states implement ACA Medicaid expansion and policymakers consider additional expansions of public health insurance programs such as Medicare-for-All.

Changes in Health Care Access, Behaviors, and Self-reported Health Among Low-income US Adults Through the Fourth Year of the Affordable Care Act.

BACKGROUND: Health care access increased for low-income Americans under the Affordable Care Act (ACA). It is unknown whether these changes in access were associated with improved self-reported health. OBJECTIVE: Determine changes in health care access, health behaviors, and self-reported health among low-income Americans over the first 4 years of the ACA, stratified by state Medicaid expansion status. DESIGN: Interrupted time series and difference-in-differences analysis. SUBJECTS: Noninstitutionalized US adults (18-64 y) in low income households (<138% federal poverty level) interviewed in the Behavioral Risk Factor Surveillance System 2011-2017 (N=505,824). MEASURES: Self-reported insurance coverage, access to a primary care physician, avoided care due to cost; self-reported general health, days of poor physical health, days of poor mental health days, and days when poor health limited usual activities; self-reported health behaviors, use of preventive services, and diagnoses. RESULTS: Despite increases in access, the ACA was not associated with improved physical or general health among low-income adults during the first 4 years of implementation. However, Medicaid expansion was associated with fewer days spent in poor mental health (-1.1 d/mo, 95% confidence interval: -2.1 to -0.5). There were significant changes in specific health behaviors, preventive service use, and diagnosis patterns during the same time period which may mediate the relationship between the ACA rollout and self-reported health. CONCLUSION: In nationally-representative survey data, we observed improvements in mental but not physical self-reported health among low-income Americans after 4 years of full ACA implementation.

Impact of the Affordable Care Act Medicaid Expansion on Utilization of Mental Health Care.

BACKGROUND: The Affordable Care Act's Medicaid expansions (ME) increased insurance coverage for low-income Americans, among whom unmet need for mental health care is high. Empirical evidence regarding the impact of expanding insurance coverage on use of mental health services among low income and minority populations is lacking. METHODS: Data on mental health service use collected between 2007 and 2015 by the Medical Expenditures Panel Survey from nationally representative cross-sectional samples of low income (income<138% of the federal poverty line) adults were analyzed. Use trends among people in states that expanded Medicaid (ME states; n=29,827) were compared with concurrent trends among people in states that did not (non-ME states; n=22,873), with statistical adjustment for demographic characteristics and psychological distress. RESULTS: Annual outpatient visits for mental health conditions increased by 0.513 (0.053-0.974) visits per person, from a baseline rate in ME states of 0.894 visits per person. However, no significant changes were observed in number of mental health related hospital stays, emergency department visits or prescription fills. The increase outpatient visits was limited to Hispanics and non-Hispanic Whites, with no increase in service use observed among non-Hispanic Blacks. There was no apparent increase in the number of users of outpatient mental health care (AOR=0.992, P=0.942) and a marginally significant (P=0.096) increase of 3.144 visits per user. DISCUSSION: ME had a limited but positive impact on use of mental health services by low income Americans, although it may also have increased racial/ethnic disparities.

County-level Variation in Low Birthweight and Preterm Birth: An Evaluation of State Medicaid Expansion Under the Affordable Care Act.

BACKGROUND: Rates of low birthweight and prematurity vary 2-fold across states in the United States, with increased rates among states with higher concentrations of racial minorities. Medicaid expansion may serve as a mechanism to reduce geographic variation within states that expanded, by improving health and access to care for vulnerable populations. OBJECTIVE: The objective of this study was to identify the association of Medicaid expansion with changes in county-level geographic variation in rates of low birthweight and preterm births, overall and stratified by race/ethnicity. RESEARCH DESIGN: We compared changes in the coefficient of variation and the ratio of the 80th-to-20th percentiles using bootstrap samples (n=1000) of counties drawn separately for all births and for white, black, and Hispanic births, separately. MEASURES: County-level rates of low birthweight and preterm birth. RESULTS: Before Medicaid expansion, counties in expansion states were concentrated among quintiles with lower rates of adverse birth outcomes and counties in nonexpansion states were concentrated among quintiles with higher rates. In expansion states, county-level variation, measured by the coefficient of variation, declined for both outcomes among all racial/ethnic categories. In nonexpansion states, geographic variation reduced for both outcomes among Hispanic births and for low birthweight among white births, but increased for both outcomes among black births. CONCLUSIONS: The decrease in county-level variation in adverse birth outcomes among expansion states suggests improved equity in these states. Further reduction in geographic variation will depend largely on policies or interventions that reduce racial disparities in states that did and did not expand Medicaid.

Work Requirements and Medicaid Disenrollment in Arkansas, Kentucky, Louisiana, and Texas, 2018.

Objectives. To identify risk factors for Medicaid disenrollment after the implementation of Arkansas's work requirements.Methods. Using a 2018 telephone survey of 1208 low-income adults aged 30 to 49 years in Arkansas (expansion state with work requirements implemented in June 2018), Kentucky (expansion state with proposed work requirements blocked by courts), Louisiana (expansion state without work requirements), and Texas (nonexpansion state), we assessed Medicaid disenrollment rates among the age group targeted by Arkansas's policy.Results. The Medicaid disenrollment rate was highest in Texas (12.8%), followed by Arkansas (10.5%), Kentucky (5.8%), and Louisiana (2.8%). Over half of those who disenrolled in Texas and Arkansas became uninsured, compared with less than a quarter in Kentucky and Louisiana. In multivariate models, Arkansas had significantly higher disenrollment compared with the 3 comparison states; men and non-Hispanic Whites experienced higher disenrollment than women and racial minorities. In Arkansas, having a chronic condition was associated with higher disenrollment.Conclusions. As states debate work requirements and Medicaid reforms, our findings provide insights for policymakers about which populations may be most vulnerable to losing Medicaid coverage.

Did the Affordable Care Act Reach Penetrating Trauma Patients?

BACKGROUND: The benefits of the Affordable Care Act (ACA) for trauma patients have been well established. However, the ACA's impact on penetrating trauma patients (PTPs), a population that is historically young and uninsured, has not been defined. We hypothesized that PTPs in the post-ACA era would have better outcomes. MATERIAL AND METHODS: The National Trauma Data Bank (NTDB) was queried for all PTPs from 2009 (pre-ACA) and 2011-2014 (post-ACA). Subset analysis was performed in patients aged 19-25 y, as this group was eligible for the ACA's dependent care provision (DCP). RESULTS: There were 9,714,471 patients in the study, with 2,053,501 (21.1%) pre-ACA and 7,660,970 (78.9%) post-ACA. When compared to pre-ACA, patients in the post-ACA cohort were more likely to have commercial/private insurance, less likely to have Medicaid, and more likely to be uninsured. On logistic regression, the pre-ACA era was associated with mortality (HR: 1.02, 95% CI: 1.01-1.04, P = 0.004). Being uninsured was associated with mortality (HR: 1.89, 95% CI: 1.87-1.92, P < 0.001). On subset analysis of the DCP age group, post-ACA patients were more likely to be uninsured (24.1% versus 17.6%; P < 0.001). In addition, for the DCP age group, pre-ACA era was not associated with mortality (HR: 1.03, 95% CI: 0.99-1.06, P = 0.20). CONCLUSIONS: Although the ACA provided a survival benefit to PTPs overall, it did not increase insurance coverage for this population. In addition, the DCP of the ACA did not improve insurance access for PTP in the eligible age group. Further efforts are needed to extend insurance access to this population.

The association between health care coverage and prevalence of cardiovascular diseases and diabetes over a 10-year period.

Persons without health care coverage have poorer health outcomes. We investigated the association between health care coverage and trends in the prevalence of cardiovascular disease (CVD) and diabetes pre- and post-Affordable Care Act (ACA) periods. Using data from 3,824,678 surveyed adults in the Behavioral Risk Factor Surveillance System survey from 2007 - 2016, we calculated the yearly prevalence of CVD and diabetes. Using logistic regression, we investigated the association between health care coverage and CVD and diabetes, controlling for sociodemographic factors (age, sex, race, marital status, education and income). The mean age of participants was 55.3 ± 18.9 years. Health care coverage increased from 88.6% in 2007 to 93% in 2016. The prevalence of CVD and diabetes increased from pre- to post-ACA periods. After adjustment, in pre-ACA period, the odds ratio (OR) for the association between health care coverage and CVD and diabetes was 1.32 (95% CI:1.30-1.34) and 1.44 (95% CI:1.41-1.46), respectively; in the post-ACA period, the OR was 1.26 (95% CI:1.22-1.30) and 1.48 (95% CI:1.44-1.52), respectively. We found a significant association between health care coverage and trends in the prevalence of CVD and diabetes in the pre- and post-ACA periods.

Unintended consequences of health insurance: Affordable Care Act's free contraception mandate and risky sex.

Health insurance is a primary driver of rising medical expenditures. Economic theory suggests that insurance induces an increase in risky behaviors, but previous empirical evidence is mixed. I use a mandate in the Affordable Care Act in which contraceptives were covered at zero cost to consumers to test for unintended effects of insurance on risky sex. Leveraging mandated zero cost-sharing for contraception and pre-policy insured rates as a measure of treatment intensity, I provide evidence that this 2012 policy reduced fertility but caused unintended consequences: a decline in condom use and a subsequent increase in sexually transmitted infections (STIs). I discuss shortcomings of controlling for nonparallel pre-trends using state-trends, and I suggest an alternative to control for pre-trends directly in the context of dose-response difference-in-differences. Finally, estimates based on the 2010 dependent coverage mandate indicate health insurance provides an overall net positive effect on insurance and STI prevention.

The Impact of the Affordable Care Act Medicaid Expansion on Vascular Surgery.

BACKGROUND: The Affordable Care Act (ACA) Medicaid expansion increased Medicaid eligibility such that all adults with an income level up to 138% of the federal poverty threshold in 2014 qualified for Medicaid benefits. Prior studies have shown that the ACA Medicaid expansion was associated with increased access to care. The impact of the ACA Medicaid expansion on patients undergoing complex care for major vascular pathology has not been evaluated. METHODS: The Healthcare Cost and Utilization Project State Inpatient Database was used to identify patients undergoing care for major vascular pathology in 6 states from 2010 to 2014. The analysis cohort included adult patients between the ages of 18 and 64 years who underwent a nonemergent surgical procedure for an abdominal aortic aneurysm, thoracic aortic aneurysm, carotid artery stenosis, peripheral vascular disease, or chronic kidney disease. Poisson regression was used to determine the incidence rate ratios (IRRs). RESULTS: There were a total of 83,960 patients in the study cohort. Compared with nonexpansion states, inpatient admissions for Medicaid patients with an abdominal or thoracic aneurysm and carotid stenosis diagnosis increased significantly (IRR, 1.20, 1.27, 1.06, respectively; P < 0.05) in states that expanded Medicaid. Vascular-related surgeries increased for carotid endarterectomy, lower extremity revascularization, lower extremity amputation, and arteriovenous fistula in expansion states (IRR, 1.24, 1.10, 1.11, 1.16, respectively; P < 0.05) compared with nonexpansion states. CONCLUSIONS: In states that expanded Medicaid coverage under the ACA, the rate of vascular-related surgeries and admissions for Medicaid patients increased. We conclude that expanding insurance coverage results in enhanced access to vascular surgery.