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Trends in the use of evidence-based therapy for resectable gastric cancer

Authors

  • Rebecca A. Snyder MD, MPH,

    1. Department of Surgery, Vanderbilt Medical Center, Nashville, Tennessee
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  • David F. Penson MD, MPH,

    1. Department of Urology, Vanderbilt Medical Center, Nashville, Tennessee
    2. Center for Surgical Quality and Outcomes Research, Vanderbilt Medical Center, Nashville, Tennessee
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  • Shenghua Ni PhD,

    1. Department of Urology, Vanderbilt Medical Center, Nashville, Tennessee
    2. Center for Surgical Quality and Outcomes Research, Vanderbilt Medical Center, Nashville, Tennessee
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  • Tatsuki Koyama PhD,

    1. Department of Biostatistics, Vanderbilt Medical Center, Nashville, Tennessee
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  • Nipun B. Merchant MD

    Corresponding author
    1. Division of Surgical Oncology, Vanderbilt Medical Center, Nashville, Tennessee
    • Correspondence to: Nipun B. Merchant, MD, Professor of Surgery and Cancer Biology, Division of Surgical Oncology, Vanderbilt Medical Center, 597 Preston Research Building, Nashville, TN 37232-6860.

      Fax: +1-615-343-4598. E-mail: nipun.merchant@vanderbilt.edu

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  • This work has not been previously published or presented. The authors of this report are responsible for its content. Statements in the report should not be construed as endorsement by the Department of Veterans Affairs.
  • The authors have no conflicts of interest to report.

Abstract

Background and Objectives

Two pivotal randomized controlled trials (RCTs), the Intergroup (INT-0116) and Medical Research Council Adjuvant Gastric Infusional Chemotherapy (MAGIC) trials, demonstrated a survival benefit of multimodality therapy in patients with resectable gastric cancer. The purpose of this study was to determine utilization rates of these treatment regimens in the United States and to identify factors associated with receipt of evidence-based care.

Methods

We performed a retrospective cohort study of patients with Stage IB–IV (M0) gastric adenocarcinoma who underwent resection from 1991 to 2009 using the linked SEER–Medicare database.

Results

Only 19.1% of patients received post-operative chemoradiation therapy (CRT), and 1.9% received peri-operative chemotherapy; most patients underwent surgery alone (60.9%). Patients with more advanced stage, younger age, and fewer comorbidities were more likely to receive evidence-based care. We found no association between National Cancer Institute (NCI) designation and delivery of multimodality therapy. However, patients who underwent medical oncology consultation were much more likely to receive evidence-based treatment (OR 3.10, 95% CI 2.35–4.09).

Conclusions

Rates of peri-operative chemotherapy and post-operative CRT in patients with resected gastric cancer remain remarkably low, despite high-quality RCT evidence demonstrating their benefit. Furthermore, NCI designation does not appear to be associated with administration of evidence-based treatment. J. Surg. Oncol. 2014 110:285–290. © 2014 Wiley Periodicals, Inc.

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