Garth William Strohbehn

Prof. Dr. Garth William Strohbehn

orcid

Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 September 2021 in JCO Oncology Practice
Verified
Journal Article
Closed access
CJCindy Y. Jiang
Cindy Y. Jiang
GSGarth William Strohbehn
Garth William Strohbehn
RDRachel M. Dedinsky
Rachel M. Dedinsky
SRShelby M. Raupp
Shelby M. Raupp
BPBrittany M. Pannecouk
Brittany M. Pannecouk
NRNithya Ramnath
Nithya Ramnath
PURPOSE: There was rapid adoption of teleoncology care in the Veterans Health Administration during the COVID-19 pandemic. One third of 9 million Veterans Health Administration enrolled Veterans live in rural areas. Although digital solutions can expand capacity, enhance care access, and reduce financial burden, they may also exacerbate rural-urban health disparities. Careful evaluation of patients' perceptions and policy tradeoffs are necessary to optimize teleoncology postpandemic. METHODS: Patients with ≥ 1 teleoncology visit with medical, surgical, or radiation oncology between March 2020 and June 2020 were identified retrospectively. Validated, Likert-type survey assessing patient satisfaction was developed. Follow-up survey was conducted on patients with ≥ 1 teleoncology visit from August 2020 to January 2021. Travel distance, time, cost, and carbon dioxide emissions were calculated based on zip codes. RESULTS: A hundred surveys were completed (response rate, 62%). Patients overall were satisfied with teleoncology (83% Agree or Strongly Agree) but felt less satisfied than in-person visits (47% Agree or Strongly Agree). Audiovisual component improved patient perception of involvement in care, ability to self-manage health or medical needs, and comparability to in-person visits. Follow-up survey demonstrated similar satisfaction. Total travel-related savings are as follows: 86,470 miles, 84,374 minutes, $49,720 US dollars, and 35.5 metric tons of carbon dioxide. CONCLUSION: Veterans are broadly satisfied with teleoncology. Audiovisual capabilities are critical to satisfaction. This is challenging for rural populations with lack of technology access. Patients experienced financial and time savings, and society benefitted from reduced carbon emissions. Continued optimization is needed to enhance patient experience and address secondary effects.

26 January 2022 in Cancers
Verified
Journal Article
Open access
PDF file
KSKamya Sankar
Kamya Sankar
ABAlex Bryant
Alex Bryant
GSGarth William Strohbehn
Garth William Strohbehn
LZLili Zhao
Lili Zhao
DEDavid Elliott
David Elliott
MGMichael Green
Michael Green
One year of durvalumab following concurrent chemoradiotherapy improves progression-free (PFS) and overall survival (OS) for patients with stage III non-small cell lung cancer (NSCLC). However, the real-world efficacy of durvalumab has not been determined. We conducted a multi-center observational cohort study across the Veterans Health Administration, including patients with stage III NSCLC who received concurrent chemoradiotherapy and durvalumab, compared to patients who received concurrent chemoradiotherapy alone. Kaplan–Meier and Cox regression approaches were used to identify factors associated with PFS and OS. We calculated a hazard ratio and efficacy-effectiveness factor to compare OS of veterans to the referenced clinical trial population. A total of 1006 patients with stage III NSCLC who received concurrent chemoradiotherapy and at least one dose of durvalumab from November 2017 to April 2021 were compared to 989 patients who received concurrent chemoradiotherapy alone from January 2015 to December 2016. Adjuvant durvalumab was associated with higher PFS (HR 0.62, 95% CI 0.55–0.70, p < 0.001) and OS (HR 0.57, 95% CI 0.50–0.66, p < 0.001). OS was shorter in veterans compared to PACIFIC (HR 1.24, 95% CI 1.03–1.48, p = 0.02: EE gap 0.73). OS of veterans with stage III NSCLC treated with adjuvant durvalumab is improved compared to a modern comparator but is reduced compared to the PACIFIC population.

1 November 2022 in JAMA Oncology
Verified
Journal Article
Open access
PDF file
GSGarth William Strohbehn
Garth William Strohbehn
RHRobert Holleman
Robert Holleman
JBJennifer Burns
Jennifer Burns
MKMandi L. Klamerus
Mandi L. Klamerus
MKMichael J. Kelley
Michael J. Kelley
THTimothy P. Hofer
Timothy P. Hofer
The immune checkpoint inhibitor pembrolizumab, first approved by the US Food and Drug Administration (FDA) in 2014, is a standard treatment for nearly 20 diseases. Registrational pembrolizumab trials administered doses every 3 weeks (standard interval) of 200 mg (flat) or 2 mg per kg (weight based).1 Pharmacokinetic modeling2 led the European Medicines Agency to approve 400 mg every 6 weeks dosing (extended interval) of pembrolizumab in March 2019.1 The FDA rejected a supplemental biologics license application for extended-interval pembrolizumab in February 2020 owing to concern that lower trough concentrations would reduce efficacy.3 However, the FDA reversed course in April 2020, approving extended-interval pembrolizumab after preliminary nonprespecified analysis of KEYNOTE-555 cohort B—a single-arm cohort of patients outside of the US (n = 44) receiving extended-interval pembrolizumab for melanoma—demonstrated response and immune-related adverse event rates approximately equivalent to historic standard-interval controls.4

12 June 2022 in European Journal of Cancer
Verified
Journal Article
Closed access
ABAlex Bryant
Alex Bryant
KSKamya Sankar
Kamya Sankar
LZLili Zhao
Lili Zhao
GSGarth William Strohbehn
Garth William Strohbehn
DEDavid Elliott
David Elliott
MGMichael Green
Michael Green

1 September 2023 in JCO Oncology Practice
Verified
Journal Article
Closed access
SJSofia I. Jacobson
Sofia I. Jacobson
AKAlec Kacew
Alec Kacew
RKRandall Knoebel
Randall Knoebel
PHPo-Hung Hsieh
Po-Hung Hsieh
MRMark J Ratain
Mark J Ratain
GSGarth William Strohbehn
Garth William Strohbehn
Cancer therapy has environmental costs. In this simulation analysis, @garthstrohbehn and colleagues show how less frequent dosing and shorter durations of therapy might improve public health without making patients with cancer worse off.

14 March 2022 in npj Breast Cancer
Verified
Journal Article
Open access
PDF file
PHPo-Hung Hsieh
Po-Hung Hsieh
AKAlec J. Kacew
Alec J. Kacew
MDMarie Dreyer
Marie Dreyer
ASAnthony V. Serritella
Anthony V. Serritella
RKRandall W. Knoebel
Randall W. Knoebel
MRMark J Ratain
Mark J Ratain
Patients with breast cancer frequently experience financial hardship, often due to the high costs of anti-cancer drugs. We sought to develop alternative trastuzumab dosing strategies, compare their pharmacokinetic effectiveness to standard dosing, and assess the expected financial implications of transitioning to them. We extracted clinical data from the records of 135 retrospectively identified patients with HER2-positive early breast cancer at a single, urban comprehensive cancer center who were treated with trastuzumab between 2017 and 2019. We performed pharmacokinetic simulations on a range of trastuzumab dose levels and frequencies, assessing efficacy by trough trastuzumab concentration (Ctrough) and population and individual likelihoods of Ctrough exceeding trastuzumab minimum effective concentration (MEC). We performed deterministic financial modeling to estimate the treatment-associated financial savings from alternative dosing strategies. Trastuzumab maintenance doses of 4 mg/kg every 3 weeks (Q3W) and 6 mg/kg every 4 weeks (Q4W) had nearly identical probabilities of Ctrough being above MEC as standard of care 6 mg/kg every 3 weeks. In the primary financial analysis, both trastuzumab 4 mg/kg Q3W and 6 mg/kg Q4W were associated with significant drug- and administration-related out-of-pocket cost savings over the duration of therapy, ranging from $765 (neoadjuvant, Q4W) to $2791 (adjuvant, Q4W). In particular, Q4W trastuzumab increased savings related to lost wages and travel cost avoidance. Low-dose and reduced frequency trastuzumab in appropriately selected patients may significantly reduce total drug utilization and meaningfully reduce patient financial toxicity. Prospective clinical trials evaluating low-dose or reduced-frequency administration of therapeutic monoclonal antibodies are warranted and needed.