Brenna O’Masta, MPH, is the Assistant Director of the Health Economics and Evaluation Research Program at the UCLA Center for Health Policy Research (CHPR). She currently manages multiple projects, including an evaluation of CalAIM’s PATH initiative for the California Department of Health Care Services, a report on unified financing planning for California Health and Human Services Agency, a study on the impact of the Aliso Canyon Disaster on healthcare utilization for the Los Angeles Department of Public Health, and a report to the legislature on dental anesthesia and sedation in California for the California Department of Public Health.

Her past projects with the HEER program include evaluations of Whole Person Care, the Health Homes Program, and Housing for a Healthy California. Her primary area of focus for these evaluations were quantitative analysis of medical claims and encounter data.

Prior to joining UCLA CHPR, O’Masta worked at the University of Cambridge with the clinical informatics group. In this role, she facilitated research using data from a newly acquired electronic health record. She also worked as a senior analyst at a life science and public health consulting company in Washington, D.C., where she managed a large-scale meta-analysis of ADHD risk factors for the Centers for Disease Control and Prevention.

O’Masta has a master’s degree in public health in epidemiology from the University of Washington (UW) and a bachelor of science degree in biochemistry from the University of Virginia.

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Collaboration Strategies for Bridging Health, Behavioral Health, and Social Services in California's Medi-Cal Whole Person Care Pilot Program
Journal Article
Journal Article

Collaboration Strategies for Bridging Health, Behavioral Health, and Social Services in California's Medi-Cal Whole Person Care Pilot Program

Researchers identify collaboration strategies used to integrate health, behavioral health, and social services for Medicaid members in California's Medi-Cal Whole Person Care Pilot program (WPC). Data were collected as part of the statewide evaluation of WPC. Authors analyzed qualitative data to examine strategies used by pilots to integrate care, network data to identify pilots that improved cross-sector collaboration (i.e., strengthened density or multiplexity of cross-sector ties) following WPC implementation, and comparative case analysis to identify strategies that differentiated pilots that improved collaboration from those that did not.

Findings: Pilots used multiple strategies to facilitate the integration of care. Network analyses identified 10 pilots that significantly improved either density or multiplexity of cross-sector ties, and one pilot with high cross-sector collaboration prior to WPC. Compared to pilots that did not improve cross-sector collaboration, these pilots meaningfully engaged partners in program design and implementation, used braided funds, and leveraged WPC to support broader systems change. These pilots also reported fewer challenges in developing and managing contractual relationships and ensuring meaningful use of data-sharing infrastructure by frontline staff responsible for care coordination.

Data sharing is necessary but not sufficient for systems alignment. Collaboration strategies focused on addressing financial barriers to integration and strengthening normative and interpersonal integration are also needed.

Associations of Homelessness with Primary Care and Acute Care Utilization Among Medicaid-Enrolled Youth
Journal Article
Journal Article

Associations of Homelessness with Primary Care and Acute Care Utilization Among Medicaid-Enrolled Youth

Youth comprise one-third of the U.S. homeless population. However, little is known about how homelessness affects health care utilization. Authors examine associations of homelessness with hospitalization, primary care, and emergency department (ED) visits, varying by race/ethnicity, among Medicaid-enrolled youth.

Findings: Approximately 17% of sampled youth experienced homelessness in 2018 (N=90,202). Compared with their housed counterparts, youth experiencing homelessness had a 1.9 percentage point (pp) higher likelihood of frequent ED visits but a 2.9 pp lower probability of any primary care visits. Homelessness was associated with 221 more ED visits, 100 more preventable ED visits, 19.9 more hospitalizations, but 56 fewer primary care visits, per 1,000 youth. The associations of homelessness with total ED visits, preventable ED visits, and needed and nonpreventable ED visits were all higher among whites and, particularly, Blacks, than for Hispanics and Asians.

Medicaid-enrolled youth who experienced homelessness had more overall ED, preventable ED, and hospital visits, but fewer primary care visits than their housed peers. Results suggest promoting primary care use should be considered among strategies to improve health and reduce costs.
 

parks after dark evaluation brief cover with little girls wearing PAD shirts and showing medals and infographic in the background
Policy Brief
Policy Brief

Parks After Dark Evaluation Brief, May 2024

Summary: In this infographic brief, the UCLA Center for Health Policy Research summarizes information from their evaluation of the 2022 Parks After Dark (PAD) program in Los Angeles County. PAD is a county initiative led by the Department of Parks and Recreation in partnership with other county departments and community-based organizations. PAD programming — including sports, entertainment, activities, and more — was offered for eight weeks on Thursday, Friday, and Saturday evenings at 34 parks between June and August 2023.

Findings: Evaluators found that PAD has made significant progress in achieving its intended goals through the provision of quality recreational programming in a safe and family-friendly environment. Besides ensuring participant’s sense of safety at parks while attending PAD programming, evidence indicates that PAD may have reduced crime in PAD parks and their surrounding areas since its inception in 2010. In addition, PAD encouraged meaningful collaboration between participating county departments and community-based organizations; contributed to participant’s feelings of well-being, family togetherness, and social cohesion; and involved a diverse range of participants in community-driven programming in a meaningful way. PAD may also have reduced the burden of disease for those that engaged in exercise opportunities.

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Previous years:

Cover of Parks After Dark evaluation report, May 2024
Policy Research Report
Policy Research Report

Parks After Dark Evaluation Report, May 2024

Summary: In this report, the UCLA Center for Health Policy Research provides information from their evaluation of the 2023 Parks After Dark (PAD) program in Los Angeles County.

PAD is a Los Angeles County initiative led by the Department of Parks and Recreation (DPR) in partnership with other County departments and community-based organizations. Thirty-four DPR parks hosted PAD between June and August 2023. PAD was offered three nights a week for eight weeks, on Thursday, Friday, and Saturday evenings. In 2022, PAD expanded to include one-day events around spring and winter school breaks.

Select 2023 evaluation findings include:

  • Difference-in-difference (DD) analysis indicated a reduction in crime rates in PAD parks after implementation of PAD when compared to similar parks that did not implement PAD, with 74 fewer Part I crimes and 43 fewer Part II crimes between 2010 and 2023 in all PAD parks. As indicated in 2023 PAD participant surveys, among PAD attendees who expressed not feeling safe in their neighborhood, 64% felt safe at PAD.
  • In key informant surveys, PAD partners strongly agreed that PAD improved collaboration between County departments and community-based organizations (9.3 of 10).
  • In 2023 PAD participant surveys, attendees overwhelmingly reported that PAD increased quality time with family members (96%), provided a sense of belonging within the community (96%), and improved their relationship with their neighbors (94%).
  • Of attendees who did not meet the recommended activity guidelines for their age, 76% participated in physical activity at PAD. Using a modified version of the Integrated Transport and Health Impacts Model (ITHIM), the level of physical activity at PAD, if sustained year-round, would primarily reduce stroke and ischemic heart disease and lead to an overall decline of 20 years of life lost, 20 fewer years of disability adjusted life years, and avoidance of two premature deaths for the entire PAD population in 2023.
  • A vast majority of attendees expressed high levels of satisfaction, with 97% saying they would attend PAD again and 97% also said they would recommend PAD to others. 

The 2023 evaluation findings demonstrate that PAD has made significant progress in achieving its intended goals through the provision of quality recreational programming in a safe and family-friendly environment. Evidence indicates that PAD may have reduced crime in PAD parks and their surrounding areas since its inception in 2010, while also ensuring participant’s sense of safety. Findings further indicate that PAD encouraged meaningful collaboration between participating County departments and community-based organizations; contributed to participant’s feelings of well-being, family togetherness, and social cohesion; and meaningfully involved a diverse range of participants in community-driven programming (including youth and seniors). PAD offered sports, entertainment, and other activities for children and adults with no barriers to participation and may have reduced the burden of disease for those that engaged in exercise opportunities. Overall, participant satisfaction levels at PAD remain high each year.

Read the Publications: 

Previous years:

Collaboration Strategies for Bridging Health, Behavioral Health, and Social Services in California's Medi-Cal Whole Person Care Pilot Program
Journal Article
Journal Article

Collaboration Strategies for Bridging Health, Behavioral Health, and Social Services in California's Medi-Cal Whole Person Care Pilot Program

Researchers identify collaboration strategies used to integrate health, behavioral health, and social services for Medicaid members in California's Medi-Cal Whole Person Care Pilot program (WPC). Data were collected as part of the statewide evaluation of WPC. Authors analyzed qualitative data to examine strategies used by pilots to integrate care, network data to identify pilots that improved cross-sector collaboration (i.e., strengthened density or multiplexity of cross-sector ties) following WPC implementation, and comparative case analysis to identify strategies that differentiated pilots that improved collaboration from those that did not.

Findings: Pilots used multiple strategies to facilitate the integration of care. Network analyses identified 10 pilots that significantly improved either density or multiplexity of cross-sector ties, and one pilot with high cross-sector collaboration prior to WPC. Compared to pilots that did not improve cross-sector collaboration, these pilots meaningfully engaged partners in program design and implementation, used braided funds, and leveraged WPC to support broader systems change. These pilots also reported fewer challenges in developing and managing contractual relationships and ensuring meaningful use of data-sharing infrastructure by frontline staff responsible for care coordination.

Data sharing is necessary but not sufficient for systems alignment. Collaboration strategies focused on addressing financial barriers to integration and strengthening normative and interpersonal integration are also needed.

View All Publications

Cover of Parks After Dark evaluation report, May 2024
Policy Research Report
Policy Research Report

Parks After Dark Evaluation Report, May 2024

Summary: In this report, the UCLA Center for Health Policy Research provides information from their evaluation of the 2023 Parks After Dark (PAD) program in Los Angeles County.

PAD is a Los Angeles County initiative led by the Department of Parks and Recreation (DPR) in partnership with other County departments and community-based organizations. Thirty-four DPR parks hosted PAD between June and August 2023. PAD was offered three nights a week for eight weeks, on Thursday, Friday, and Saturday evenings. In 2022, PAD expanded to include one-day events around spring and winter school breaks.

Select 2023 evaluation findings include:

  • Difference-in-difference (DD) analysis indicated a reduction in crime rates in PAD parks after implementation of PAD when compared to similar parks that did not implement PAD, with 74 fewer Part I crimes and 43 fewer Part II crimes between 2010 and 2023 in all PAD parks. As indicated in 2023 PAD participant surveys, among PAD attendees who expressed not feeling safe in their neighborhood, 64% felt safe at PAD.
  • In key informant surveys, PAD partners strongly agreed that PAD improved collaboration between County departments and community-based organizations (9.3 of 10).
  • In 2023 PAD participant surveys, attendees overwhelmingly reported that PAD increased quality time with family members (96%), provided a sense of belonging within the community (96%), and improved their relationship with their neighbors (94%).
  • Of attendees who did not meet the recommended activity guidelines for their age, 76% participated in physical activity at PAD. Using a modified version of the Integrated Transport and Health Impacts Model (ITHIM), the level of physical activity at PAD, if sustained year-round, would primarily reduce stroke and ischemic heart disease and lead to an overall decline of 20 years of life lost, 20 fewer years of disability adjusted life years, and avoidance of two premature deaths for the entire PAD population in 2023.
  • A vast majority of attendees expressed high levels of satisfaction, with 97% saying they would attend PAD again and 97% also said they would recommend PAD to others. 

The 2023 evaluation findings demonstrate that PAD has made significant progress in achieving its intended goals through the provision of quality recreational programming in a safe and family-friendly environment. Evidence indicates that PAD may have reduced crime in PAD parks and their surrounding areas since its inception in 2010, while also ensuring participant’s sense of safety. Findings further indicate that PAD encouraged meaningful collaboration between participating County departments and community-based organizations; contributed to participant’s feelings of well-being, family togetherness, and social cohesion; and meaningfully involved a diverse range of participants in community-driven programming (including youth and seniors). PAD offered sports, entertainment, and other activities for children and adults with no barriers to participation and may have reduced the burden of disease for those that engaged in exercise opportunities. Overall, participant satisfaction levels at PAD remain high each year.

Read the Publications: 

Previous years:

parks after dark evaluation brief cover with little girls wearing PAD shirts and showing medals and infographic in the background
Policy Brief
Policy Brief

Parks After Dark Evaluation Brief, May 2024

Summary: In this infographic brief, the UCLA Center for Health Policy Research summarizes information from their evaluation of the 2022 Parks After Dark (PAD) program in Los Angeles County. PAD is a county initiative led by the Department of Parks and Recreation in partnership with other county departments and community-based organizations. PAD programming — including sports, entertainment, activities, and more — was offered for eight weeks on Thursday, Friday, and Saturday evenings at 34 parks between June and August 2023.

Findings: Evaluators found that PAD has made significant progress in achieving its intended goals through the provision of quality recreational programming in a safe and family-friendly environment. Besides ensuring participant’s sense of safety at parks while attending PAD programming, evidence indicates that PAD may have reduced crime in PAD parks and their surrounding areas since its inception in 2010. In addition, PAD encouraged meaningful collaboration between participating county departments and community-based organizations; contributed to participant’s feelings of well-being, family togetherness, and social cohesion; and involved a diverse range of participants in community-driven programming in a meaningful way. PAD may also have reduced the burden of disease for those that engaged in exercise opportunities.

Read the Publications:

Previous years: