Effects of Medicare eligibility and enrollment at age 65 years on the use of high-value and low-value care

National trends and disparities in herpes zoster vaccination among US older adults with chronic obstructive pulmonary disease, 2008 to 2022

BACKGROUND

Chronic obstructive pulmonary disease (COPD) is a risk factor for herpes zoster. Vaccination can prevent or attenuate herpes zoster and its related complications. However, evidence regarding vaccine uptake among patients with COPD is limited. Therefore, this study aimed to evaluate trends in herpes zoster vaccination and characteristics associated with vaccination among US older adults with COPD.

METHODS

Data from the 2008 to 2022 National Health Interview Survey were used. Participants aged ≥50 years were included. Joinpoint regression analysis was performed to analyze trends in herpes zoster vaccination. A multivariable logistic regression model was used to identify factors associated with vaccination.

RESULTS

From 2008 to 2022, an increasing trend in herpes zoster vaccination was observed (average annual percent change = 15.10, P < .01). This increasing trend was also observed when stratified by age groups. Disparities in vaccination were found across several factors, including age, sex, race or ethnicity, region, educational level, health insurance, income, smoking status, perceived health status, and flu and pneumococcal vaccination.

CONCLUSIONS

There has been an upward trend in herpes zoster vaccination over the past 15 years among older adults with COPD. Disparities across several characteristics existed, underscoring the necessity for targeted policies and interventions to promote equity in vaccination.

Use Of High- And Low-Value Health Care Among US Adults, By Income, 2010-19

Health care payment reforms in the US have aimed to encourage the use of high-value care while discouraging the use of low-value care. However, little is known about whether the use of high- and low-value care differs by income level. Using data from the 2010-19 Medical Expenditure Panel Survey, we examined the use of specified types of high- and low-value care by income level. We found that high-income adults were significantly more likely than low-income adults to use nearly all types of high-value care. Findings were consistent across age categories, although differences by income level in the use of high-value care were smaller among the elderly. Our analysis of differences in the use of low-value care had mixed results. Among nonelderly adults, significant differences between those with high and low incomes were found for five of nine low-value services, and among elderly adults, significant differences by income level were found for three of twelve low-value services. Understanding the mechanisms underlying these disparities is crucial to developing effective policies and interventions to ensure equitable access to high-value care and discourage low-value services for all patients, regardless of income.

Use of high- and low-value care among US adults by education levels

BACKGROUND

Healthcare reform in the United States has focused on improving the value of health care, but there are some concerns about the inequitable delivery of value-based care.

OBJECTIVE

We examine whether the receipt of high- and low-value care differs by education levels.

METHODS

We employed a repeated cross-sectional study design using data from the 2010-2019 Medical Expenditure Panel Survey. Our outcomes included 8 high-value services across 3 categories and 9 low-value services across 3 categories. Our primary independent variable was education level: (i) no degree, (ii) high school diploma, and (iii) college graduate. We conducted a linear probability model while adjusting for individual-level characteristics and estimated the adjusted values of the outcomes for each education group.

RESULTS

In almost all services, the use of high-value care was greater among more educated adults than less educated adults. Compared to those with no degree, those with a college degree were significantly more likely to receive all high-value services except for HbA1c measurement, ranging from blood pressure measurement (4.5 percentage points [95% CI: 3.9-5.1]) to colorectal cancer screening (15.6 percentage points [95% CI: 13.9-17.3]). However, there were no consistent patterns of the use of low-value care by education levels.

CONCLUSION

Our findings suggest that more educated adults were more likely to receive high-value cancer screening, high-value diagnostic and preventive testing, and high-value diabetes care than less educated adults. These findings highlight the importance of implementing tailored policies to address education-based inequities in the delivery of high-value services in the United States.

Effects of Medicare eligibility and enrollment at age 65 among immigrants and US-born residents

BACKGROUND

Understanding the impacts of Medicare coverage among immigrants is of high policy importance, but there is currently limited evidence. In this study, we examined the effects of near universal access to Medicare coverage at age 65 years between immigrants and US-born residents.

METHODS

Using the 2007-2019 Medical Expenditure Panel Survey, we employed a regression discontinuity design, which exploits the eligibility for Medicare at age 65 years. Our outcomes were health insurance coverage, healthcare spending, access to and use of health care, and self-reported health status.

RESULTS

Medicare eligibility at age 65 led to significant increases in Medicare coverage among immigrants and US-born residents (74.6 [95% CI: 71.6-77.5] and 81.6 [95% CI: 80.5-82.7] percentage points). Medicare enrollment at age 65 decreased total healthcare spending and out-of-pocket spending by $1579 (95% CI: -2092 to 1065) and $423 (95% CI: -544 to 303) for immigrants and $1186 (95% CI: -2359 to 13) and $450 (95% CI: -774 to 127) for US-born residents. After Medicare enrollment at age 65, immigrants reported only limited improvements in overall access to and use of health care, but they reported significant increases in the use of high-value care (11.5 [95% CI: 6.8-16.2], 8.3 [95% CI: 6.0-10.6], 8.4 [95% CI: 1.0-15.8], and 2.3 [95% CI: 0.9-3.7] percentage points increase for colorectal cancer screening, eye examination for diabetes, influenza vaccine, and cholesterol measurement) and improvements in self-reported health (5.9 [95% CI: 0.9-10.8] and 4.8 [95% CI: 0.5-9.0] percentage points increase for good perceived physical and mental health). Medicare enrollment also increased prescription drug spending by $705 (95% CI: 292-1117), despite the unchanged use of prescription drugs. For US-born residents, use of high-value care, self-reported health, and prescription drug use and spending did not change substantially after Medicare enrollment.

CONCLUSION

Medicare has the potential to improve care among older adult immigrants.

Association between Medicare eligibility at age 65 years and in-hospital treatment patterns and health outcomes for patients with trauma: regression discontinuity approach

OBJECTIVE

To determine whether health systems in the United States modify treatment or discharge decisions for otherwise similar patients based on health insurance coverage.

DESIGN

Regression discontinuity approach.

SETTING

American College of Surgeons' National Trauma Data Bank, 2007-17.

PARTICIPANTS

Adults aged between 50 and 79 years with a total of 1 586 577 trauma encounters at level I and level II trauma centers in the US.

INTERVENTIONS

Eligibility for Medicare at age 65 years.

MAIN OUTCOME MEASURES

The main outcome measure was change in health insurance coverage, complications, in-hospital mortality, processes of care in the trauma bay, treatment patterns during hospital admission, and discharge locations at age 65 years.

RESULTS

1 586 577 trauma encounters were included. At age 65, a discontinuous increase of 9.6 percentage points (95% confidence interval 9.1 to 10.1) was observed in the share of patients with health insurance coverage through Medicare at age 65 years. Entry to Medicare at age 65 was also associated with a decrease in length of hospital stay for each encounter, of 0.33 days (95% confidence interval -0.42 to -0.24 days), or nearly 5%), which coincided with an increase in discharges to nursing homes (1.56 percentage points, 95% confidence interval 0.94 to 2.16 percentage points) and transfers to other inpatient facilities (0.57 percentage points, 0.33 to 0.80 percentage points), and a large decrease in discharges to home (1.99 percentage points, -2.73 to -1.27 percentage points). Relatively small (or no) changes were observed in treatment patterns during the patients' hospital admission, including no changes in potentially life saving treatments (eg, blood transfusions) or mortality.

CONCLUSIONS

The findings suggest that differences in treatment for otherwise similar patients with trauma with different forms of insurance coverage arose during the discharge planning process, with little evidence that health systems modified treatment decisions based on patients' coverage.