Riley D&Period;<&Sol;Span Shearer<&Sol;Span
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Riley D&Period;<&Sol;Span Shearer<&Sol;Span has a total of 56 co-authors. Here are the top co-authors by number of shared publications:
Benjamin A. Howell
Department of Medicine, Section of General Internal Medicine, Yale School of Medicine, New Haven, CT
5 shared publicationsGavin Bart
Division of Addiction Medicine, Department of Medicine, Hennepin Healthcare, 900 S 8(th) St, Minneapolis, MN 55415, USA
5 shared publications- Tyler N. A. Winkelman
Health, Homelessness, and Criminal Justice Lab, Hennepin Healthcare Research Institute, Minneapolis, USA
5 shared publications Tyler N.A. Winkelman
Health, Homelessness, and Criminal Justice Lab, Hennepin Healthcare Research Institute, 701 Park Ave., Suite PP7.700, Minneapolis, MN 55415, USA; Division of General Internal Medicine, Department of Medicine, Hennepin Healthcare, 716 S 7(th) St, Minneapolis, MN 55415, USA
5 shared publicationsNathan D. Shippee
University of Minnesota School of Public Health, 420 Delaware St SE, Mayo Building B681, Minneapolis, MN 55455, USA
3 shared publicationsBeth A. Virnig
College of Public Health and Health Professions, University of Florida, 1225 Center Drive, Gainsville, FL 32611, USA
2 shared publications
Latest Publications
- Open Access
- 20 January 2026
- Published by Wiley in Health & Social Care in the Community
- Vol. 2026 (1)
Identifying Ancillary Service Utilization Patterns to Improve Ryan White Client Engagement in HIV Medical Care
Objective: To describe patterns of ancillary public service use among individuals eligible for Ryan White HIV/AIDS Program (RWHAP) Part A services. Data Sources and Study Setting: This study used secondary data from people living with HIV who received Ryan White services in the Minneapolis–St. Paul, MN, 13‐county Part A grant area. We combined client data with four separate public service administrative datasets to describe ancillary service use during 2018. Study Design: This is a retrospective cross‐sectional study of linked administrative data. Key outcomes included receipt of one or more ancillary services (case management, cash assistance, food assistance, housing, health insurance, healthcare services, and other support services). We stratified descriptive analyses by current receipt of RWHAP Part A services and by engagement in HIV medical care. Data Collection: We included all individuals who received a documented RWHAP Part A–funded service in the Minneapolis–St. Paul Transitional Grant Area. We used probabilistic matching on name and date of birth to link RWHAP client data with administrative datasets. Principal Findings: 96.3% of PLWH who received at least one RWHAP Part A–funded service were retained in care, but only 66.0% of PLWH who received at least one other public service, but no RWHAP services, remained engaged in HIV medical care. We also observed high rates of cross‐sector utilization. Among recipients of each RWHAP Part A–funded service, 75.7%–85.7% also received at least one other public service. Conclusions: The integration of traditionally siloed administrative datasets can inform the public health response to ensure PLWH receive necessary ancillary services and identify opportunities to re‐engage people in HIV medical care.
- 20 January 2026
- Published by Wiley in Health & Social Care in the Community
- Vol. 2026 (1)
Open AccessIdentifying Ancillary Service Utilization Patterns to Improve Ryan White Client Engagement in HIV Medical Care
Objective: To describe patterns of ancillary public service use among individuals eligible for Ryan White HIV/AIDS Program (RWHAP) Part A services. Data Sources and Study Setting: This study used secondary data from people living with HIV who received Ryan White services in the Minneapolis–St. Paul, MN, 13‐county Part A grant area. We combined client data with four separate public service administrative datasets to describe ancillary service use during 2018. Study Design: This is a retrospective cross‐sectional study of linked administrative data. Key outcomes included receipt of one or more ancillary services (case management, cash assistance, food assistance, housing, health insurance, healthcare services, and other support services). We stratified descriptive analyses by current receipt of RWHAP Part A services and by engagement in HIV medical care. Data Collection: We included all individuals who received a documented RWHAP Part A–funded service in the Minneapolis–St. Paul Transitional Grant Area. We used probabilistic matching on name and date of birth to link RWHAP client data with administrative datasets. Principal Findings: 96.3% of PLWH who received at least one RWHAP Part A–funded service were retained in care, but only 66.0% of PLWH who received at least one other public service, but no RWHAP services, remained engaged in HIV medical care. We also observed high rates of cross‐sector utilization. Among recipients of each RWHAP Part A–funded service, 75.7%–85.7% also received at least one other public service. Conclusions: The integration of traditionally siloed administrative datasets can inform the public health response to ensure PLWH receive necessary ancillary services and identify opportunities to re‐engage people in HIV medical care.
- 9 September 2024
- Published by Elsevier in Women and Birth
- Vol. 37, 15-16
Supporting pregnant women with disability- "the only way forward"
- 9 September 2024
- Published by Elsevier in Women and Birth
- Vol. 37, 15-16
Supporting pregnant women with disability- "the only way forward"
- 14 August 2024
- Published by Elsevier in Journal of Substance Use and Addiction Treatment
- Vol. 166, 209492
Perinatal substance use treatment and criminal legal system referral trends
- 14 August 2024
- Published by Elsevier in Journal of Substance Use and Addiction Treatment
- Vol. 166, 209492
Perinatal substance use treatment and criminal legal system referral trends
- Open Access
- 4 February 2024
- Published by Elsevier in Drug and Alcohol Dependence Reports
- Vol. 10, 100219
Characteristics and co-morbidities associated with hospital discharges for opioid and methamphetamine co-use, United States 2016–2019
- 4 February 2024
- Published by Elsevier in Drug and Alcohol Dependence Reports
- Vol. 10, 100219
Open AccessCharacteristics and co-morbidities associated with hospital discharges for opioid and methamphetamine co-use, United States 2016–2019
- 9 January 2024
- Published by SAGE Publications in Substance use & addiction journal
- Vol. 45 (2) , 250-259
Providers’ Experiences and Perspectives in Treating Patients With Co-Occurring Opioid and Stimulant Use Disorders in the Hospital
Background: The overdose crisis is increasingly characterized by opioid and stimulant co-use. Despite effective pharmacologic treatment for both opioid use disorder (OUD) and contingency management for stimulant use disorders, most individuals with these co-occurring conditions are not engaged in treatment. Hospitalization is an important opportunity to engage patients and initiate treatment, however existing hospital addiction care is not tailored for patients with co-use and may not meet the needs of this population. Methods: Semi-structured interviews were conducted with hospital providers about their experiences and perspectives treating patients with opioid and stimulant co-use. We used directed content analysis to identify common experiences and opportunities to improve hospital-based treatment for patients with co-use. Results: From qualitative interviews with 20 providers, we identified 4 themes describing how co-use complicated hospital-based substance use treatment: (1) patients’ unstable circumstances impacting the treatment plan, (2) co-occurring withdrawals are difficult to identify and treat, (3) providers holding more stigmatizing views of patients with co-use, and (4) stimulant use is often “ignored” in the treatment plans. Participants also described a range of potential opportunities to improve hospital-based treatment of co-use that fall into 3 categories: (1) provider practice changes, (2) healthcare system changes, and (3) development and validation of clinical tools and treatment approaches. Conclusions: We identified unique challenges providing hospital addiction medicine care to patients who use both opioids and stimulants. These findings inform the development, implementation, and testing of hospital-based interventions for patients with co-use.
- 9 January 2024
- Published by SAGE Publications in Substance use & addiction journal
- Vol. 45 (2) , 250-259
Providers’ Experiences and Perspectives in Treating Patients With Co-Occurring Opioid and Stimulant Use Disorders in the Hospital
Background: The overdose crisis is increasingly characterized by opioid and stimulant co-use. Despite effective pharmacologic treatment for both opioid use disorder (OUD) and contingency management for stimulant use disorders, most individuals with these co-occurring conditions are not engaged in treatment. Hospitalization is an important opportunity to engage patients and initiate treatment, however existing hospital addiction care is not tailored for patients with co-use and may not meet the needs of this population. Methods: Semi-structured interviews were conducted with hospital providers about their experiences and perspectives treating patients with opioid and stimulant co-use. We used directed content analysis to identify common experiences and opportunities to improve hospital-based treatment for patients with co-use. Results: From qualitative interviews with 20 providers, we identified 4 themes describing how co-use complicated hospital-based substance use treatment: (1) patients’ unstable circumstances impacting the treatment plan, (2) co-occurring withdrawals are difficult to identify and treat, (3) providers holding more stigmatizing views of patients with co-use, and (4) stimulant use is often “ignored” in the treatment plans. Participants also described a range of potential opportunities to improve hospital-based treatment of co-use that fall into 3 categories: (1) provider practice changes, (2) healthcare system changes, and (3) development and validation of clinical tools and treatment approaches. Conclusions: We identified unique challenges providing hospital addiction medicine care to patients who use both opioids and stimulants. These findings inform the development, implementation, and testing of hospital-based interventions for patients with co-use.
- 5 January 2024
- Published by Wolters Kluwer Health in Medical Care
- Vol. 62 (3) , 151-160
Racial and Ethnic Differences in Heroin, Methamphetamine, and Cocaine Use, Treatment, and Mortality Trends in 3 National Data Sources—United States, 2010-2019
Background: As overdose deaths continue to rise, public health officials need comprehensive surveillance data to design effective prevention, harm reduction, and treatment strategies. Disparities across race and ethnicity groups, as well as trends in substance use, treatment, or overdose deaths, have been examined individually, but reports rarely compare findings across multiple substances or data sources. Objective: To provide a broad assessment of the overdose crisis, we describe trends in substance use, treatment, and overdose mortality across racial and ethnic groups for multiple substances. Research Design: We conducted a longitudinal, cross-sectional analysis comparing trends. Subjects: We identified self-reported use from the National Survey on Drug Use and Health, substance use treatment admissions from the Treatment Episode Data Set-Admissions, and overdose deaths from the CDC’s Multiple Cause of Death files. Measures: We measured rates of substance use, treatment, and deaths involving heroin, methamphetamine, and cocaine among United States adults from 2010 to 2019. Results: Heroin, methamphetamine, and cocaine use increased, though not all changes were statistically significant. Treatment admissions indicating heroin and methamphetamine increased while admissions indicating cocaine decreased. Overdose deaths increased among all groups: methamphetamine (257%–1,115%), heroin (211%–577%), and cocaine (88%–259%). Changes in rates of use, treatment, and death for specific substances varied by racial and ethnic group. Conclusions: Substance use, treatment, and overdose mortality changed considerably, though not always equivalently. Identifying diverging trends in substance-related measures for specific substances and racial and ethnic groups can inform targeted investment in treatment to reduce disparities and respond to emerging changes in the overdose crisis.
- 5 January 2024
- Published by Wolters Kluwer Health in Medical Care
- Vol. 62 (3) , 151-160
Racial and Ethnic Differences in Heroin, Methamphetamine, and Cocaine Use, Treatment, and Mortality Trends in 3 National Data Sources—United States, 2010-2019
Background: As overdose deaths continue to rise, public health officials need comprehensive surveillance data to design effective prevention, harm reduction, and treatment strategies. Disparities across race and ethnicity groups, as well as trends in substance use, treatment, or overdose deaths, have been examined individually, but reports rarely compare findings across multiple substances or data sources. Objective: To provide a broad assessment of the overdose crisis, we describe trends in substance use, treatment, and overdose mortality across racial and ethnic groups for multiple substances. Research Design: We conducted a longitudinal, cross-sectional analysis comparing trends. Subjects: We identified self-reported use from the National Survey on Drug Use and Health, substance use treatment admissions from the Treatment Episode Data Set-Admissions, and overdose deaths from the CDC’s Multiple Cause of Death files. Measures: We measured rates of substance use, treatment, and deaths involving heroin, methamphetamine, and cocaine among United States adults from 2010 to 2019. Results: Heroin, methamphetamine, and cocaine use increased, though not all changes were statistically significant. Treatment admissions indicating heroin and methamphetamine increased while admissions indicating cocaine decreased. Overdose deaths increased among all groups: methamphetamine (257%–1,115%), heroin (211%–577%), and cocaine (88%–259%). Changes in rates of use, treatment, and death for specific substances varied by racial and ethnic group. Conclusions: Substance use, treatment, and overdose mortality changed considerably, though not always equivalently. Identifying diverging trends in substance-related measures for specific substances and racial and ethnic groups can inform targeted investment in treatment to reduce disparities and respond to emerging changes in the overdose crisis.
- Open Access
- 1 December 2023
- Published by Taylor & Francis in Substance Use & Misuse
- Vol. 59 (4) , 558-566
Understanding Regional Patterns of Overdose Deaths Related to Opioids and Psychostimulants
As overdose rates increase for multiple substances, policymakers need to identify geographic patterns of substance-specific deaths. In this study, we describe county-level opioid and psychostimulant overdose patterns and how they correlate with county-level social vulnerability measures. A cross-sectional observational study, we used nationwide 2016-2018 restricted access Centers for Disease Prevention and Control county-level mortality files for 1,024 counties. We estimated quartiles of opioid and psychostimulant overdose mortality and provided estimates of their association with county-level Social Vulnerability Index (SVI) percentile. There was high opioid and psychostimulant overdose mortality in the Middle Atlantic, South Atlantic, East North Central, and Mountain regions. The Central US had the lowest opioid and psychostimulant overdose mortality rates. Counties with higher SVI scores (i.e. higher social vulnerability) were significantly more likely to experience high opioid and high psychostimulant overdose (high-high) mortality. A 10-percentile increase in SVI score was associated with a 3.1 percentage point increase in the likelihood of being a high-high county (p < 0.001) in unadjusted models and a 1.5 percentage point increase (p < 0.05) in models adjusting for region. Our results illustrated the heterogenous geographic distribution of the growing concurrent opioid and psychostimulant overdose crisis. The substantial regional variation we identified highlights the need for local data to guide policymaking and treatment planning. The association of opioid-psychostimulant overdose mortality with social vulnerability demonstrates the critical need in impacted counties for tailored treatment that addresses the complex medical and social needs of people who use both opioids and psychostimulants.
- 1 December 2023
- Published by Taylor & Francis in Substance Use & Misuse
- Vol. 59 (4) , 558-566
Open AccessUnderstanding Regional Patterns of Overdose Deaths Related to Opioids and Psychostimulants
As overdose rates increase for multiple substances, policymakers need to identify geographic patterns of substance-specific deaths. In this study, we describe county-level opioid and psychostimulant overdose patterns and how they correlate with county-level social vulnerability measures. A cross-sectional observational study, we used nationwide 2016-2018 restricted access Centers for Disease Prevention and Control county-level mortality files for 1,024 counties. We estimated quartiles of opioid and psychostimulant overdose mortality and provided estimates of their association with county-level Social Vulnerability Index (SVI) percentile. There was high opioid and psychostimulant overdose mortality in the Middle Atlantic, South Atlantic, East North Central, and Mountain regions. The Central US had the lowest opioid and psychostimulant overdose mortality rates. Counties with higher SVI scores (i.e. higher social vulnerability) were significantly more likely to experience high opioid and high psychostimulant overdose (high-high) mortality. A 10-percentile increase in SVI score was associated with a 3.1 percentage point increase in the likelihood of being a high-high county (p < 0.001) in unadjusted models and a 1.5 percentage point increase (p < 0.05) in models adjusting for region. Our results illustrated the heterogenous geographic distribution of the growing concurrent opioid and psychostimulant overdose crisis. The substantial regional variation we identified highlights the need for local data to guide policymaking and treatment planning. The association of opioid-psychostimulant overdose mortality with social vulnerability demonstrates the critical need in impacted counties for tailored treatment that addresses the complex medical and social needs of people who use both opioids and psychostimulants.
- 1 November 2023
- Published by Health Affairs Publishing, LLC in Health Affairs
- Vol. 42 (11) , 1568-1574
Minnesota Data Sharing May Be Model For Near-Real-Time Tracking Of Drug Overdose Hospital And ED Trends
The drug overdose epidemic in the US necessitates detailed and timely data to inform public health responses. In this article we describe how an electronic health record (EHR) data-sharing collaboration across health systems in Minnesota that was developed in response to the COVID-19 pandemic was adapted to monitor trends in substance use-related hospital and emergency department (ED) visits. We found large increases in methamphetamine- and opioid-involved hospital and ED visits. Throughout the study period, Native American, Black, and multiple-race people experienced the highest rates of drug-involved hospital and ED visits. Monitoring drug-involved health care use through EHR data has the potential to help public health officials detect trends in near real time before mortality spikes and may also inform early intervention. The use of EHR data also allows for detailed monitoring of the impact of the drug overdose epidemic across racial and ethnic groups.
- 1 November 2023
- Published by Health Affairs Publishing, LLC in Health Affairs
- Vol. 42 (11) , 1568-1574
Minnesota Data Sharing May Be Model For Near-Real-Time Tracking Of Drug Overdose Hospital And ED Trends
The drug overdose epidemic in the US necessitates detailed and timely data to inform public health responses. In this article we describe how an electronic health record (EHR) data-sharing collaboration across health systems in Minnesota that was developed in response to the COVID-19 pandemic was adapted to monitor trends in substance use-related hospital and emergency department (ED) visits. We found large increases in methamphetamine- and opioid-involved hospital and ED visits. Throughout the study period, Native American, Black, and multiple-race people experienced the highest rates of drug-involved hospital and ED visits. Monitoring drug-involved health care use through EHR data has the potential to help public health officials detect trends in near real time before mortality spikes and may also inform early intervention. The use of EHR data also allows for detailed monitoring of the impact of the drug overdose epidemic across racial and ethnic groups.
- 8 August 2023
- Published by Springer Nature in Journal of General Internal Medicine
- Vol. 39 (2) , 168-175
Hospital Addiction Medicine Consultation Service Orders and Outcomes by Patient Race and Ethnicity in an Urban, Safety-Net Hospital
Background Hospital admissions involving substance use disorders are increasing and represent an opportunity to engage patients in substance use treatment. Addiction medicine consultation services improve access to medications for opioid use disorder (MOUD) and patient outcomes. However, as hospitals continue to adopt addiction medicine consultation services it is important to identify where disparities may emerge in the process of care. Objective To describe addiction medicine consultation service use by race and ethnicity as well as substance to identify opportunities to reduce substance use treatment disparities. Design Retrospective cohort study using 2016–2021 Electronic Health Record data from a large Midwest safety-net hospital. Participants Hospitalized adults aged 18 or older, with one or more substance use disorders. Main Measures Consultation orders placed, patient seen by consult provider, and receipt of MOUD by self-reported race. Key Results Between 2016 and 2021, we identified 16,895 hospitalized patients with a substance use disorder. Consultation orders were placed for 6344 patients and 2789 were seen by the consult provider. Black patients were less likely (aOR = 0.58; 95% CI: 0.53–0.63) to have an addiction medicine consultation order placed and, among patients with a consultation order, were less likely (aOR = 0.74; 95% CI: 0.65–0.85) to be seen by the consult provider than White patients. Overall, Black patients with OUD were also less likely to receive MOUD in the hospital (aOR = 0.63; 95% CI: 0.50–0.79) compared to White patients. However, there were no differences in MOUD receipt among Black and White patients seen by the consult provider. Conclusions Using Electronic Health Record data, we identified racial and ethnic disparities at multiple points in the inpatient addiction medicine consultation process. Addressing these disparities may support more equitable access to MOUD and other substance use treatment in the hospital setting.
- 8 August 2023
- Published by Springer Nature in Journal of General Internal Medicine
- Vol. 39 (2) , 168-175
Hospital Addiction Medicine Consultation Service Orders and Outcomes by Patient Race and Ethnicity in an Urban, Safety-Net Hospital
Background Hospital admissions involving substance use disorders are increasing and represent an opportunity to engage patients in substance use treatment. Addiction medicine consultation services improve access to medications for opioid use disorder (MOUD) and patient outcomes. However, as hospitals continue to adopt addiction medicine consultation services it is important to identify where disparities may emerge in the process of care. Objective To describe addiction medicine consultation service use by race and ethnicity as well as substance to identify opportunities to reduce substance use treatment disparities. Design Retrospective cohort study using 2016–2021 Electronic Health Record data from a large Midwest safety-net hospital. Participants Hospitalized adults aged 18 or older, with one or more substance use disorders. Main Measures Consultation orders placed, patient seen by consult provider, and receipt of MOUD by self-reported race. Key Results Between 2016 and 2021, we identified 16,895 hospitalized patients with a substance use disorder. Consultation orders were placed for 6344 patients and 2789 were seen by the consult provider. Black patients were less likely (aOR = 0.58; 95% CI: 0.53–0.63) to have an addiction medicine consultation order placed and, among patients with a consultation order, were less likely (aOR = 0.74; 95% CI: 0.65–0.85) to be seen by the consult provider than White patients. Overall, Black patients with OUD were also less likely to receive MOUD in the hospital (aOR = 0.63; 95% CI: 0.50–0.79) compared to White patients. However, there were no differences in MOUD receipt among Black and White patients seen by the consult provider. Conclusions Using Electronic Health Record data, we identified racial and ethnic disparities at multiple points in the inpatient addiction medicine consultation process. Addressing these disparities may support more equitable access to MOUD and other substance use treatment in the hospital setting.