Yusuke Tsugawa, MD, PhD, MPH, is an affiliate at the UCLA Center for Health Policy Research and an assistant professor of medicine at the David Geffen School of Medicine at UCLA in the Division of General Internal Medicine and Health Services Research. His research interests include understanding the variation in the quality and costs of health care across individual physicians and its determinants. His work focuses on using large databases and quasi-experimental approaches. Tsugawa's research has been featured in The New York Times, The Washington Post, and National Public Radio.

Prior to joining the faculty at UCLA, Tsugawa was a health specialist at the World Bank Group and a research associate in the Department of Health Policy and Management of Harvard School of Public Health.

Tsugawa earned his medical degree from Tohoku University School of Medicine in Japan, a doctoral degree in health policy from Harvard University with a concentration in statistics, and a master's degree in public health from Harvard School of Public Health.

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Health Care Staffing Shortages and Potential National Hospital Bed Shortage
Journal Article
Journal Article

Health Care Staffing Shortages and Potential National Hospital Bed Shortage

Between August 2020 and April 2024, U.S. hospitals were mandated to report weekly occupancy to the Department of Health and Human Services as part of COVID-19 data tracking efforts. Authors repurposed this COVID-19 dashboard to describe several possible U.S. hospital bed occupancy scenarios arising from an aging U.S. population over the next decade, while varying hospitalization rates and staffed hospital bed supply.

Findings: The mean U.S. hospital occupancy was 63.9% from 2009 to 2019 compared with 75.3% in the year following the end of the COVID-19 public health emergency (PHE). The number of staffed hospital beds declined from a prepandemic steady state of 802,000 (2009–2019 mean) to a post-PHE steady state of 674,000, whereas the mean daily census steady state remained at approximately 510,000. There was substantial state-to-state variation in the post-PHE hospital occupancy steady state.

Without changes in the hospitalization rate or staffed hospital bed supply, total annual hospitalizations were projected to increase from 36,174,000 in 2025 to 40,177,000 in 2035 with the aging population. This would correspond to a national hospital occupancy of approximately 85% by 2032 for adult beds and by 2035 for adult and pediatric beds combined.

Experts in developed countries have posited that a national hospital occupancy of 85% constitutes a hospital bed shortage (a conservative estimate). The findings show that the U.S. could reach this dangerous threshold as soon as 2032, with some states at much higher risk than others. These scenarios suggest that an increase in the staffed hospital bed supply by 10%, reduction in the hospitalization rate by 10%, or some combination of the two would offset the aging-associated increase in hospitalizations over the next decade. 
 

The Association Between Physician Sex and Patient Outcomes: A Systematic Review and Meta-Analysis
Journal Article
Journal Article

The Association Between Physician Sex and Patient Outcomes: A Systematic Review and Meta-Analysis

Some prior studies have found that patients treated by female physicians may experience better outcomes, as well as lower health care costs than those treated by male physicians. Physician-patient sex concordance may also contribute to better patient outcomes. However, other studies have not identified a significant difference. There is a paucity of pooled evidence examining the association of physician sex with clinical outcomes.

This random-effects meta-analysis was conducted according to the PRISMA guidelines and prospectively registered on PROSPERO. MEDLINE and EMBASE were searched from inception to October 4, 2023, and supplemented by a hand-search of relevant studies. Observational studies enrolling adults (≥ 18 years of age) and assessing the effect of physician sex across surgical and medical specialties were included. The risk of bias was assessed using ROBINS-I. A priori subgroup analysis was conducted based on patient type (surgical versus medical). All-cause mortality was the primary outcome. Secondary outcomes included complications, hospital readmission, and length of stay.

Findings: Across 35 (n = 13,404,840) observational studies, 20 (n = 8,915,504) assessed the effect of surgeon sex while the remaining 15 (n = 4,489,336) focused on physician sex in medical/anesthesia care. Fifteen studies were rated as having a moderate risk of bias, with 15 as severe, and 5 as critical. Mortality was significantly lower among patients of female versus male physicians, which remained consistent among surgeon and non-surgeon physicians. No significant evidence of publication bias was detected. There was significantly lower hospital readmission among patients receiving medical/anesthesia care from female physicians. In a qualitative synthesis of 9 studies (n = 7,163,775), patient-physician sex concordance was typically associated with better outcomes, especially among female patients of female physicians.

Patients treated by female physicians experienced significantly lower odds of mortality, along with fewer hospital readmissions, versus those with male physicians. Further work is necessary to examine these effects in other care contexts across different countries and understand underlying mechanisms and long-term outcomes to optimize health outcomes for all patients.
 

Association Between Governmental Spending on Social Services and Health Care Use Among Low-Income Older Adults
Journal Article
Journal Article

Association Between Governmental Spending on Social Services and Health Care Use Among Low-Income Older Adults

Prior research demonstrates that local government spending on social policies, excluding health care, is linked to improved population health. Whether such spending is associated with better access to primary care and reduced acute care utilization remains unclear.

In this study, authors evaluated the associations between county-level social spending and individual-level health care utilization among low-income Medicare beneficiaries, aged ≥65 years, from 2016 to 2018. Authors linked claims data to 4 categories of county-level government expenditures from the U.S. Government Finance Database, including (1) public welfare, (2) public transit, (3) housing/community development, and (4) infrastructure-related social services. The main outcomes were annual primary care visit rates, emergency department visits, and preventable hospitalizations.

Findings: After adjusting for patient and county characteristics, beneficiaries living in counties with higher spending on housing/community development had 11% higher primary care visit rates. Additionally, those living in counties with higher public transit and housing/community development spending experienced 6%–10% lower preventable hospitalization rates. Lower preventable hospitalization rates were especially pronounced among acute conditions.

These findings suggest that investments in social services that address the health-related social needs of low-income older adults may be an important factor to consider in population-level efforts to reduce acute care utilization.
 

Comparison of Outcomes for Patients Treated by Allopathic vs Osteopathic Surgeons
Journal Article
Journal Article

Comparison of Outcomes for Patients Treated by Allopathic vs Osteopathic Surgeons

There are two degree programs for licensed physicians in the U.S.: allopathic medical doctorate (MD) and osteopathic doctorate (DO). However, evidence is limited as to whether outcomes differ between patients treated by MD vs DO surgeons.

Researchers evaluate differences in surgical outcomes and practice patterns by surgeon medical school training (MD vs DO). This study used 100% Medicare claims data from inpatient hospitals providing surgical services from January 1, 2016, to December 31, 2019 among Medicare fee-for-service beneficiaries aged 65 to 99 years who underwent 1 of the 14 most common surgical procedures. Data analysis was performed from January 17, 2023, to August 13, 2024.

The primary outcome was 30-day mortality, and the secondary outcomes were readmissions and length of stay. To assess differences between surgeons by medical school training, a multivariable linear probability model was used, which was adjusted for hospital fixed effects and patient, procedure, and surgeon characteristics.

Findings: Of the 2,360,108 total surgical procedures analyzed, 2,154,562 (91.3%) were performed by MD surgeons, and 205,546 (8.7%) were performed by DO surgeons. Of 43,651 total surgeons, most surgeons were MDs (39,339 or 90.1%), the median age was 49.0 years, and 6,649 surgeons (15.2%) were female. The mean age of patients undergoing surgical procedures was 74.9 years, 1, 353,818 of 2,360,108 patients (57.4%) were female, and 2,110,611 patients (89.4%) self-reported as white.

DO surgeons were significantly more likely to operate on older patients, female patients, and Medicaid dual-eligible patients. DOs performed a lower proportion of elective operations and were more likely to work in public hospitals and nonteaching hospitals. There was no evidence that 30-day mortality differed between MD and DO surgeons. On secondary analyses, no difference was found in 30-day readmissions or length of stay between MD and DO surgeons.

In this retrospective cohort study using Medicare data, there was no evidence that patient outcomes differed between MD and DO surgeons for common operations after adjusting for patient factors and practice settings.
 

Health Care Staffing Shortages and Potential National Hospital Bed Shortage
Journal Article
Journal Article

Health Care Staffing Shortages and Potential National Hospital Bed Shortage

Between August 2020 and April 2024, U.S. hospitals were mandated to report weekly occupancy to the Department of Health and Human Services as part of COVID-19 data tracking efforts. Authors repurposed this COVID-19 dashboard to describe several possible U.S. hospital bed occupancy scenarios arising from an aging U.S. population over the next decade, while varying hospitalization rates and staffed hospital bed supply.

Findings: The mean U.S. hospital occupancy was 63.9% from 2009 to 2019 compared with 75.3% in the year following the end of the COVID-19 public health emergency (PHE). The number of staffed hospital beds declined from a prepandemic steady state of 802,000 (2009–2019 mean) to a post-PHE steady state of 674,000, whereas the mean daily census steady state remained at approximately 510,000. There was substantial state-to-state variation in the post-PHE hospital occupancy steady state.

Without changes in the hospitalization rate or staffed hospital bed supply, total annual hospitalizations were projected to increase from 36,174,000 in 2025 to 40,177,000 in 2035 with the aging population. This would correspond to a national hospital occupancy of approximately 85% by 2032 for adult beds and by 2035 for adult and pediatric beds combined.

Experts in developed countries have posited that a national hospital occupancy of 85% constitutes a hospital bed shortage (a conservative estimate). The findings show that the U.S. could reach this dangerous threshold as soon as 2032, with some states at much higher risk than others. These scenarios suggest that an increase in the staffed hospital bed supply by 10%, reduction in the hospitalization rate by 10%, or some combination of the two would offset the aging-associated increase in hospitalizations over the next decade. 
 

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The Association Between Physician Sex and Patient Outcomes: A Systematic Review and Meta-Analysis
Journal Article
Journal Article

The Association Between Physician Sex and Patient Outcomes: A Systematic Review and Meta-Analysis

Some prior studies have found that patients treated by female physicians may experience better outcomes, as well as lower health care costs than those treated by male physicians. Physician-patient sex concordance may also contribute to better patient outcomes. However, other studies have not identified a significant difference. There is a paucity of pooled evidence examining the association of physician sex with clinical outcomes.

This random-effects meta-analysis was conducted according to the PRISMA guidelines and prospectively registered on PROSPERO. MEDLINE and EMBASE were searched from inception to October 4, 2023, and supplemented by a hand-search of relevant studies. Observational studies enrolling adults (≥ 18 years of age) and assessing the effect of physician sex across surgical and medical specialties were included. The risk of bias was assessed using ROBINS-I. A priori subgroup analysis was conducted based on patient type (surgical versus medical). All-cause mortality was the primary outcome. Secondary outcomes included complications, hospital readmission, and length of stay.

Findings: Across 35 (n = 13,404,840) observational studies, 20 (n = 8,915,504) assessed the effect of surgeon sex while the remaining 15 (n = 4,489,336) focused on physician sex in medical/anesthesia care. Fifteen studies were rated as having a moderate risk of bias, with 15 as severe, and 5 as critical. Mortality was significantly lower among patients of female versus male physicians, which remained consistent among surgeon and non-surgeon physicians. No significant evidence of publication bias was detected. There was significantly lower hospital readmission among patients receiving medical/anesthesia care from female physicians. In a qualitative synthesis of 9 studies (n = 7,163,775), patient-physician sex concordance was typically associated with better outcomes, especially among female patients of female physicians.

Patients treated by female physicians experienced significantly lower odds of mortality, along with fewer hospital readmissions, versus those with male physicians. Further work is necessary to examine these effects in other care contexts across different countries and understand underlying mechanisms and long-term outcomes to optimize health outcomes for all patients.
 

Association Between Governmental Spending on Social Services and Health Care Use Among Low-Income Older Adults
Journal Article
Journal Article

Association Between Governmental Spending on Social Services and Health Care Use Among Low-Income Older Adults

Prior research demonstrates that local government spending on social policies, excluding health care, is linked to improved population health. Whether such spending is associated with better access to primary care and reduced acute care utilization remains unclear.

In this study, authors evaluated the associations between county-level social spending and individual-level health care utilization among low-income Medicare beneficiaries, aged ≥65 years, from 2016 to 2018. Authors linked claims data to 4 categories of county-level government expenditures from the U.S. Government Finance Database, including (1) public welfare, (2) public transit, (3) housing/community development, and (4) infrastructure-related social services. The main outcomes were annual primary care visit rates, emergency department visits, and preventable hospitalizations.

Findings: After adjusting for patient and county characteristics, beneficiaries living in counties with higher spending on housing/community development had 11% higher primary care visit rates. Additionally, those living in counties with higher public transit and housing/community development spending experienced 6%–10% lower preventable hospitalization rates. Lower preventable hospitalization rates were especially pronounced among acute conditions.

These findings suggest that investments in social services that address the health-related social needs of low-income older adults may be an important factor to consider in population-level efforts to reduce acute care utilization.
 

Center in the News

Medicaid Might Cut Cardiovascular Risk for This One Group

UCLA Center for Health Policy Research Faculty Associate Dr. Yusuke Tsugawa offered commentary on how "the Oregon Health Insurance Experiment is one of the few randomized controlled trials that enables us to assess the causal impact of health insurance coverage." News https://www.medpagetoday.com/cardiology/hypertension/112087

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Center in the News

Me, Myself, as Mommy: Menopause journey exposes the limitations of women’s health care

The work of Yusuke Tsugawa, a faculty associate at the UCLA Center for Health Policy Research, is cited for his research into how female doctors may communicate better with their female patients. News https://www.standard.net/lifestyle/home_and_family/2024/may/03/me-myself-as-mommy-menopause-journey-exposes-the-limitations-of-womens-health-care/
Center in the News

Patients of female doctors — both men and women — have better outcomes, new study finds

A new study by Dr. Yusuke Tsugawa, a faculty associate at the UCLA Center for Health Policy Research, found that patients who have a female doctor are less likely to die in the days after being admitted to the hospital than patients who have a male doctor. News https://www.sfchronicle.com/health/article/study-finds-male-female-patients-fare-better-19412926.php