Publications by authors named "Daniel H Kwon"

Introduction: Consultation audio recordings improve patient decision-making but are underutilized. Patient-administered recording apps on mobile devices may increase access, but implementation has not been evaluated.

Methods: We conducted a single-arm study delivering education, coaching, and reminders for patients to record their appointment using a mobile recording app.

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To better understand veterans' decisions about germline testing, we conducted a single-site, qualitative study of 32 veterans with advanced prostate cancer. Seven days after oncologist-patient discussions about germline testing, we conducted semistructured interviews with patients to explore their decision-making process using an interview guide. Four of 14 veterans with service-connected disability benefits for prostate cancer declined germline testing for fear of losing benefits because their livelihood depended on these benefits.

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Purpose: To assess the accuracy, reliability, and readability of publicly available large language models in answering fundamental questions on hepatocellular carcinoma diagnosis and management.

Methods: Twenty questions on liver cancer diagnosis and management were asked in triplicate to ChatGPT-3.5 (OpenAI), Gemini (Google), and Bing (Microsoft).

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Objectives: Patients with metastatic renal cell carcinoma (mRCC) face complex treatment decisions and frequently turn to the Internet for treatment information. The content of patient educational websites about mRCC treatment has not been evaluated. This study evaluated the accuracy, readability, and quality of websites about the treatment of mRCC.

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  • Patients with advanced cancer in the hospital really need help making decisions about their treatment because they often feel confused and unsure.
  • The study looked at what patients, caregivers, and doctors think about decision-making and found that there are many challenges, like not having enough information.
  • Doctors also said patients don't always know what to expect after leaving the hospital, so it’s important to find ways to help them understand their choices better.
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  • This study investigates the impact of COVID-19 on female patients with breast cancer, particularly focusing on underrepresented racial/ethnic populations from March 2020 to June 2021 in the US.
  • The analysis included 1,383 patients, revealing that older age and certain racial/ethnic groups (such as Black and Asian American/Pacific Islanders) showed higher odds of severe COVID-19 outcomes.
  • Key findings noted that factors like worse performance status, pre-existing health conditions, and active cancer significantly contributed to increased severity, while variables like Hispanic ethnicity and anti-cancer therapy type did not impact outcomes as much.
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Importance: Systematic data on the association between anticancer therapies and thromboembolic events (TEEs) in patients with COVID-19 are lacking.

Objective: To assess the association between anticancer therapy exposure within 3 months prior to COVID-19 and TEEs following COVID-19 diagnosis in patients with cancer.

Design, Setting, And Participants: This registry-based retrospective cohort study included patients who were hospitalized and had active cancer and laboratory-confirmed SARS-CoV-2 infection.

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  • A study examined outcomes of cancer patients who got COVID-19, focusing on those with and without existing cardiovascular disease (CVD) or risk factors (CVRF).
  • The research found that over half of the 10,876 patients had CVD/CVRF, which linked to more severe COVID-19 symptoms and complications.
  • Notably, patients without recent cancer treatment experienced worse COVID-19 severity related to CVD/CVRF compared to those under active treatment.
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  • The study investigates the impact of COVID-19 on female breast cancer patients using a large U.S. registry during 2020-2021, focusing on underrepresented racial/ethnic populations.
  • Key findings show that older age, being Black, Asian American/Pacific Islander, and having worse overall health significantly increase the severity of COVID-19 in these patients.
  • The overall hospitalization rate was 37% and mortality rate 9%, but these rates varied depending on the active status of breast cancer in patients.
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Androgen deprivation therapy (ADT) is associated with better outcomes for men with biochemical recurrence following treatment for localized prostate cancer but can predispose patients to a higher risk of cardiovascular events. Intermittent ADT is worth considering in this setting, with close monitoring of prostate-specific antigen to decide when to restart ADT after off-treatment periods.

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Purpose: Germline testing for men with prostate cancer (PCa) poses numerous implementation barriers. Alternative models of care delivery are emerging, but implementation outcomes are understudied. We evaluated implementation outcomes of a hybrid oncologist- and genetic counselor-delivered model called the genetic testing station (GTS) created to streamline testing and increase access.

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Background: Radiopharmaceuticals, including Ga-68-prostate specific membrane antigen (PSMA)-11 and F-18-Fluciclovine, are increasingly used to inform therapies for prostate cancer (CaP). Stereotactic body radiation therapy (SBRT) to PET-detected oligometastatic CaP has been shown to improve progression free survival (PFS) and delay androgen deprivation therapy (ADT) compared to observation. For men who subsequently develop oligorecurrent CaP, outcomes following second SBRT are unknown.

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  • Cytokine storms caused by COVID-19 can lead to severe health issues, particularly in cancer patients undergoing immunotherapy due to heightened immune responses.
  • A study involving over 12,000 cancer patients aimed to explore how baseline immunosuppression and immunotherapy affect the severity of COVID-19 and the likelihood of cytokine storms.
  • Results indicated no significant differences in COVID-19 severity or cytokine storm occurrence among patients receiving immunotherapy compared to those not receiving any cancer treatment prior to their COVID-19 diagnosis.
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Background: Patients with sarcoma often require individualized treatment strategies and are likely to receive aggressive immunosuppressive therapies, which may place them at higher risk for severe COVID-19. We aimed to describe demographics, risk factors, and outcomes for patients with sarcoma and COVID-19.

Methods: We performed a retrospective cohort study of patients with sarcoma and COVID-19 reported to the COVID-19 and Cancer Consortium (CCC19) registry (NCT04354701) from 17 March 2020 to 30 September 2021.

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Background: Skeletal-related events (SREs) from bone metastases disease carry significant morbidity in men with metastatic castration resistant prostate cancer (mCRPC). The differential risk of SREs among patients receiving abiraterone acetate (AA) or enzalutamide (ENZ) is unknown.

Methods: To compare the risk of SREs among men with mCRPC receiving AA or ENZ, a retrospective cohort study using the SEER-Medicare Linked Database was conducted.

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Background: TMPRSS2, a cell surface protease regulated by androgens and commonly upregulated in prostate cancer (PCa), is a necessary component for SARS-CoV-2 viral entry into respiratory epithelial cells. Previous reports suggested a lower risk of SARS-CoV-2 among PCa patients on androgen deprivation therapy (ADT). However, the impact of ADT on severe COVID-19 illness is poorly understood.

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  • * Data from the COVID-19 and Cancer Consortium indicates that those treated for B-lymphoid malignancies within the past year have a greater severity of COVID-19 compared to those who were not recently treated.
  • * The study highlights the need for tailored strategies to protect this vulnerable group of patients, as recent treatment appears to be a key factor in increased COVID-19 risk.
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Background: The interaction between cancer diagnoses and COVID-19 infection and outcomes is unclear. We leveraged a state-wide, multi-institutional database to assess cancer-related risk factors for poor COVID-19 outcomes.

Methods: We conducted a retrospective cohort study using the University of California Health COVID Research Dataset, which includes electronic health data of patients tested for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) at 17 California medical centers.

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  • The study investigates the frequency and outcomes of coinfections in cancer patients who also have COVID-19, a group at high risk for such infections.
  • Among 8,765 patients analyzed, 16.6% developed coinfections, predominantly bacterial, with specific risk factors identified such as age, sex, and existing health conditions.
  • Co-occurrence of bacterial and fungal infections significantly increased the 30-day mortality rates, highlighting the severe impact of these coinfections in this vulnerable population.
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Purpose: Men with metastatic castration-resistant prostate cancer increasingly encounter complex treatment decisions. Consultation audio recordings and summaries promote patient informed decision making but are underutilized. Mobile recording software applications may increase access.

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The phase 3 PROfound trial led to the recent approval of the PARP inhibitor olaparib for men with metastatic castration-resistant prostate cancer and mutations in homologous recombination repair genes. We raise methodological concerns about the trial, including: a suboptimal control arm, problematic use of crossover, use of radiographic progression-free survival as the primary endpoint, and ambiguous benefit for patients with mutations in homologous recombination repair genes other than BRCA1, BRCA2, and ATM.

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