Publications by authors named "Michael Killian"

Introduction: Anxiety symptoms influence health outcomes in pediatric organ transplant recipients. Assessing the quality of anxiety scales is critical to address the psychological challenges these patients face. Variability in how anxiety is conceptualized across scales highlights the need for selecting appropriate instruments.

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Introduction: Limited research has explored immunosuppressant medication adherence over time in pediatric transplant patients, who often struggle with posttransplant regimen adherence, resulting in poor outcomes.

Methods: This study investigated the longitudinal growth in immunosuppressive medication levels following transplantation. Medication level variability index (MLVI) scores from tacrolimus blood levels of pediatric organ transplant recipients at a major medical center were analyzed.

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Article Synopsis
  • - The TEDDY Study aims to understand the environmental factors contributing to type 1 diabetes in children with a genetic predisposition, emphasizing the importance of keeping participants engaged throughout the 15-year research period for reliable results.
  • - Retention strategies for the TEDDY Study were categorized into four main domains: barrier reduction, community building, follow-up reminders, and tracing, alongside unique approaches specifically tailored for the study.
  • - Effective participant retention planning from the outset, along with ongoing engagement strategies for both children and their parents, is critical for addressing challenges and ensuring a successful observational study.
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  • The study focuses on cardiac amyloidosis (CA) in patients with severe aortic stenosis undergoing transcatheter aortic valve replacement (TAVR), highlighting that CA commonly leads to poor outcomes for these patients.
  • The researchers analyzed data from 1,426 TAVR patients using an ECG AI model to predict CA risk, discovering that 24.4% had a high probability of CA, yet only 1.2% were clinically diagnosed.
  • Results showed that a high CA probability significantly correlated with increased all-cause mortality and rates of major adverse cardiovascular events, particularly heart failure hospitalizations, suggesting that these patients should undergo further diagnostic assessment for CA.
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Medication non-adherence remains a significant challenge for adolescent heart transplant recipients. Building on the success of a pilot intervention study, herein we describe the protocol for a follow-up randomised control trial using mobile video directly observed therapy, featuring several innovations, to promote medication adherence in a multi-centre sample of adolescent heart transplant patients.

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Electronic health records (EHR) have been widely used in building machine learning models for health outcomes prediction. However, many EHR-based models are inherently biased due to lack of risk factors on social determinants of health (SDoH), which are responsible for up to 40% preventive deaths. As SDoH information is often captured in clinical notes, recent efforts have been made to extract such information from notes with natural language processing and append it to other structured data.

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Article Synopsis
  • Cardiac masses include various tumors, both primary and secondary, and often show non-specific symptoms, making early identification critical for aggressive types like sarcomas, which have a poor prognosis if metastatic.
  • The report discusses two cases of patients with dyspnoea diagnosed with different sarcomas: one being a primary undifferentiated pleomorphic sarcoma and the other a secondary round cell myxoid liposarcoma, highlighting their distinct presentations and imaging findings.
  • Undifferentiated pleomorphic sarcomas are the most common primary cardiac malignancy, typically arising in the left atrium, while round cell myxoid liposarcomas are rare metastases that can also affect the heart; both require prompt
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Background: Pediatric mental health emergency department (ED) visits are increasing at 6% to 10% per year, at substantial cost, while 13% of youth with psychiatric hospitalizations are readmitted in the following weeks. Hospitals do not have the resources to meet escalating youth's mental health needs. Intensive outpatient (IOP) programs, which provide multiple hours of care each week, have the power to reduce the number of patients in need of hospitalized care and provide a step-down option for patients discharging from ED's in order to prevent readmissions.

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Background: Immune checkpoint inhibitor (ICI) myocarditis is associated with significant mortality risk. Electrocardiogram (ECG) changes in ICI myocarditis have strong prognostic value. However the impact of complete heart block (CHB) is not well defined.

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Background: The youth mental health crisis in the United States continues to worsen, and research has shown poor mental health treatment engagement. Despite the need for personalized engagement strategies, there is a lack of research involving youth. Due to complex youth developmental milestones, there is a need to better understand clinical presentation and factors associated with treatment engagement to effectively identify and tailor beneficial treatments.

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Few studies in pediatric solid organ transplantation have examined non-adherence to immunosuppressive medication over time and its associations with demographic factors and post-transplant outcomes including late acute rejection and hospitalizations. We examined longitudinal variation in patient Medication Level Variability Index (MLVI) adherence data from pediatric kidney, liver, and heart transplant recipients. Patient and administrative data from the United Network for Organ Sharing were linked with electronic health records and MLVI values for 332 patients.

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Adolescents heart transplant recipients experience difficulty with adherence to immunosuppressive medication leading to increased risk of organ rejection, hospitalization, and mortality. Few interventions have been successful to promote medication adherence in adolescent heart transplant patients as most fail to engage the patient in the behavioral change process and support patient-provider communication. The purpose of this study was to explore the nature and degree of in-app communication between adolescent heart transplant recipients and nursing staff during an asynchronous mobile video directly observed therapy intervention.

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Background: The prediction of posttransplant health outcomes for pediatric heart transplantation is critical for risk stratification and high-quality posttransplant care.

Objective: The purpose of this study was to examine the use of machine learning (ML) models to predict rejection and mortality for pediatric heart transplant recipients.

Methods: Various ML models were used to predict rejection and mortality at 1, 3, and 5 years after transplantation in pediatric heart transplant recipients using United Network for Organ Sharing data from 1987 to 2019.

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Background:  Early treatment dropout among youths and young adults (28%-75%) puts them at risk for poorer outcomes. Family engagement in treatment is linked to lower dropout and better attendance in outpatient, in-person treatment. However, this has not been studied in intensive or telehealth settings.

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Background: Atrial fibrillation is the most common cardiac arrhythmia and is a major risk factor for stroke, with an incidence rate of 4-5% per year. The use of DOACs is recommended for specific patient populations however the risk of bleeding commonly precludes their use. Left atrial appendage occlusion is a relatively novel procedure recommended for such patients.

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Purpose: We report on antidepressant (AD) adherence among Hispanics seeking mental health services in a community primary care clinic in Texas as an ancillary outcome from a National Institutes of Health-funded study that collected data on Hispanic AD adherence over a period of two years (February 2016-February 2018). Adherence to AD medications was measured throughout the year-long trial and compared across various demographic characteristics. Since Hispanic individuals often experience stigma and cultural barriers related to AD treatment, we sought to understand what factors may increase the likelihood of non-adherence in this population.

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Comorbid PTSD and depression are notably high within primary care settings serving low-income and/or immigrant Hispanic/Latino populations. There is limited research examining how comorbid PTSD impacts the response to depression treatment for patients within these settings. The purpose of this study was to examine PTSD-depression comorbidity and its association with treatment outcomes among Hispanic/Latino patients enrolled in an integrated behavioral health intervention for depression.

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Objective: Biomarkers predicting risk of type 1 diabetes (stage 3) among children with islet autoantibodies are greatly needed to prevent diabetic ketoacidosis and facilitate prevention therapies.

Research Design And Methods: Children in the prospective The Environmental Determinants of Diabetes in the Young (TEDDY) study (n = 707) with confirmed diabetes-associated autoantibodies (GAD antibody, IA-2A, and/or insulin autoantibody) and two or more HbA1c measurements were followed to diabetes or median age 11.1 years.

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This study examined associations between scores on the Adolescent Medication Barriers Scale (AMBS) and the Parent Medication Barriers Scale (PMBS), patient and family factors, and medication adherence outcomes. Patients and caregivers from a pediatric solid organ transplantation (SOT) program were recruited for participation. Pediatric SOT recipients ages 10 to 21 years were eligible for participation.

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Purpose: HT recipients experience high levels of medication non-adherence during adolescence. This pilot study examined the acceptability and feasibility of an asynchronous DOT mHealth application among adolescent HT recipients. The app facilitates tracking of patients' dose-by-dose adherence and enables transplant team members to engage patients.

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Background: Ireland has a mixed model of healthcare delivery with a public healthcare system funded by general taxation and a large private healthcare insurance system, covering 43% of the population in 2012 and 2016. We set out to examine disparities in outcomes among patients with breast cancer treated in a private hospital compared to national outcomes over a comparable period.

Methods: Medical records of patients diagnosed with early (Stage 1-3 as per AJCC version 5) breast cancer between 2010 and 2015 at Bon Secours Hospital, Cork, Ireland were reviewed.

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Context: Rapid growth has been suggested to promote islet autoimmunity and progression to type 1 diabetes (T1D). Childhood growth has not been analyzed separately from the infant growth period in most previous studies, but it may have distinct features due to differences between the stages of development.

Objective: We aimed to analyze the association of childhood growth with development of islet autoimmunity and progression to T1D diagnosis in children 1 to 8 years of age.

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