A. James O’Malley
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View article: Changes in patient-sharing patterns after oncologist departures in rural and urban settings: a Medicare cohort study
Changes in patient-sharing patterns after oncologist departures in rural and urban settings: a Medicare cohort study Open
Cancer care relies on effective coordination within a multidisciplinary care team. Changes to teams due to departures remain understudied despite rising oncologist turnover in the United States. In this study, we aimed to investigate the i…
View article: Evaluating the role of visit audio recordings in triadic dementia care: study protocol
Evaluating the role of visit audio recordings in triadic dementia care: study protocol Open
This work is a necessary first step to improving PLWD triadic care by identifying behaviors that impact triadic interpersonal communication and their associations with health-related outcomes. The novel intervention that we will develop--t…
View article: Associations of Social Deprivation and Oncology Physician Network Vulnerability With Acute Care Utilization in the <scp>SEER</scp> ‐Medicare Population
Associations of Social Deprivation and Oncology Physician Network Vulnerability With Acute Care Utilization in the <span>SEER</span> ‐Medicare Population Open
Objective The objectives of this study were to evaluate associations of social deprivation with acute care utilization among patients with cancer, and to examine potential effect modification by physician network vulnerability. Study Setti…
View article: Temporal Exposure Dependence Bias in Vaccine Efficacy Trials
Temporal Exposure Dependence Bias in Vaccine Efficacy Trials Open
This work investigates the estimation of the per-contact vaccine efficacy (VE), using Cox proportional hazards models, in infectious disease clinical trials. We identify a previously unrecognized source of bias that arises from temporally …
View article: The association of prescriber prominence in a shared-patient physician network with their patients receipt of and transitions between risky drug combinations
The association of prescriber prominence in a shared-patient physician network with their patients receipt of and transitions between risky drug combinations Open
We are generally interested in the association between a prescribing physician’s position in a physician shared-patient network and their patients’ receipt of risky drug combinations. An informal physician network (not restricted to a hosp…
View article: Causal Mediation Analysis for Zero-inflated Mixture Mediators
Causal Mediation Analysis for Zero-inflated Mixture Mediators Open
Causal mediation analysis is an important statistical tool to quantify effects transmitted by intermediate variables from a cause to an outcome. There is a gap in mediation analysis methods to handle mixture mediator data that are zero-inf…
View article: Hidden figures underlying quality measures: revealing hidden racial inequalities in end-of-life cancer care delivery: a cohort study
Hidden figures underlying quality measures: revealing hidden racial inequalities in end-of-life cancer care delivery: a cohort study Open
This work was supported by the American Cancer Society Award (RSG-22-128-01-HOPS).
View article: A Bayesian zero-inflated spatially varying coefficients model for overdispersed binomial data
A Bayesian zero-inflated spatially varying coefficients model for overdispersed binomial data Open
Cardiometabolic risk factors (CRFs) during pregnancy are early indicators of maternal diseases, such as stroke and type 2 diabetes. The total number of CRFs typically takes the form of binomial counts that exhibit overdispersion and zero i…
View article: Sustained Improvements After Intervention to Prevent Contrast‐Associated Acute Kidney Injury: A Randomized Controlled Trial
Sustained Improvements After Intervention to Prevent Contrast‐Associated Acute Kidney Injury: A Randomized Controlled Trial Open
Background In the IMPROVE AKI (A Cluster‐Randomized Trial of Team‐Based Coaching Interventions to Improve Acute Kidney Injury) trial, a combination of team‐based coaching and data‐driven surveillance dashboards reduced the odds of AKI foll…
View article: Tutorial on Usability Testing a Digital Intervention with Survivors of Stroke, Including Those with Communication Difficulties: A Methodological Guide (Preprint)
Tutorial on Usability Testing a Digital Intervention with Survivors of Stroke, Including Those with Communication Difficulties: A Methodological Guide (Preprint) Open
BACKGROUND Usability testing of websites is core business for website designers. Survivors of stroke, particularly those with communication difficulties, are rarely included in usability testing. Our team, including survivors of stroke an…
View article: Creation of EmpowerMe, a co-designed website to promote self-efficacy in survivors of stroke (Preprint)
Creation of EmpowerMe, a co-designed website to promote self-efficacy in survivors of stroke (Preprint) Open
BACKGROUND Digital health innovations are frequently used to support people to manage chronic health conditions. Stroke is common, and people who have survived a stroke and live in the community must learn to manage their health independe…
View article: Effectiveness of Transcarotid vs Transfemoral Carotid Stenting for Stroke Prevention
Effectiveness of Transcarotid vs Transfemoral Carotid Stenting for Stroke Prevention Open
Importance The effectiveness of surgical transcarotid artery revascularization (TCAR) compared with percutaneous transfemoral carotid artery stenting (TF-CAS) for stroke prevention beyond the periprocedural period is poorly quantified. Obj…
View article: Methodology for supervised optimization of the construction of physician shared-patient networks
Methodology for supervised optimization of the construction of physician shared-patient networks Open
There is growing use of shared-patient physician networks in health services research and practice, but minimal study of the consequences of decisions made in constructing them. To address this gap, we surveyed physician employees of a Nat…
View article: Sexual Orientation– and Gender Identity–Affirming Activities Provided in Primary Care
Sexual Orientation– and Gender Identity–Affirming Activities Provided in Primary Care Open
Importance Addressing health disparities in lesbian, gay, bisexual, transgender, and queer (LGBTQ+) communities has been a significant policy focus for more than a decade. Ensuring access to safe, respectful primary health care from knowle…
View article: Primary Care Practice Factors Associated With Telehealth Adoption in the United States: Cross-Sectional Survey Analysis
Primary Care Practice Factors Associated With Telehealth Adoption in the United States: Cross-Sectional Survey Analysis Open
In this national study of primary care practice–level factors associated with telehealth adoption in 2022, we found that training and assisting patients with the use of telehealth, broadband expansion efforts, and a higher proportion of lo…
View article: Changes in US Primary Care Access and Capabilities During the COVID-19 Pandemic
Changes in US Primary Care Access and Capabilities During the COVID-19 Pandemic Open
Importance Many of the capabilities needed to deliver accessible, high-quality primary care have been defined, but little is known about how their implementation has changed in US practices over the course of the COVID-19 pandemic or about…
View article: A Scoping Review of Multilevel Patient-Sharing Network Measures in Health Services Research
A Scoping Review of Multilevel Patient-Sharing Network Measures in Health Services Research Open
Social network analysis is the study of the structure of relationships between social entities. Access to health care administrative datasets has facilitated use of “patient-sharing networks” to infer relationships between health care prov…
View article: Developing and Comparing Four Families of Bayesian Network Autocorrelation Models for Binary Outcomes: Estimating Peer Effects Involving Adoption of Medical Technologies
Developing and Comparing Four Families of Bayesian Network Autocorrelation Models for Binary Outcomes: Estimating Peer Effects Involving Adoption of Medical Technologies Open
Despite the extensive use of network autocorrelation models in social network analysis, network autocorrelation models for binary dependent variables have received surprisingly scant attention. In this paper, we develop four network autoco…
View article: Associations Between Oncology Outreach and Patient‐Sharing Measures of Care Coordination
Associations Between Oncology Outreach and Patient‐Sharing Measures of Care Coordination Open
Background Oncology outreach is a common strategy for addressing cancer workforce shortages, where traveling oncologists commute across clinical settings to extend their services. Despite its known benefits specifically for rural patients,…
View article: Assessing a behavioral nudge on healthcare leaders’ intentions to implement evidence-based practices
Assessing a behavioral nudge on healthcare leaders’ intentions to implement evidence-based practices Open
Importance Leaders of healthcare organizations play a key role in developing, prioritizing, and implementing plans to adopt new evidence-based practices. This study examined whether a letter with peer comparison data and social norms messa…
View article: Oncology Physician Turnover in the United States Based on Medicare Claims Data
Oncology Physician Turnover in the United States Based on Medicare Claims Data Open
Objective: Physician turnover rates are rising in the United States. The cancer workforce, which relies heavily on clinical teamwork and care coordination, may be more greatly impacted by turnover. In this study, we aimed to characterize o…
View article: Travel burden and bypassing closest site for surgical cancer treatment for urban and rural oncology patients
Travel burden and bypassing closest site for surgical cancer treatment for urban and rural oncology patients Open
Purpose We examined the relationship between travel burden for surgical cancer care and rurality, geographic bypass of the nearest surgical facility, cancer type, and mortality outcomes. Methods Using Medicare claims and enrollment data (2…
View article: Combining multiple sources of relationships in a network to advance understanding of physicians' beliefs regarding peer-effects
Combining multiple sources of relationships in a network to advance understanding of physicians' beliefs regarding peer-effects Open
Patient-sharing physician networks are increasingly recognized as valuable tools for examining physician relationships in healthcare research. However, very few studies have examined the reliability of such networks and summary measures de…
View article: A Quality Improvement Initiative for Inpatient Advance Care Planning
A Quality Improvement Initiative for Inpatient Advance Care Planning Open
Importance The Centers for Medicare &amp; Medicaid Services (CMS) implemented advance care planning (ACP) billing codes in 2016 to encourage practitioners to conduct and document ACP conversations, and included ACP as a quality metric …