Cited by 713Statistical Methods in Clinical TrialsColorectal Cancer Treatments and StudiesColorectal Cancer Surgical Treatments

Disease-free survival versus overall survival as a primary end point for adjuvant colon cancer studies: individual patient data from 20,898 patients on 18 randomized trials

Sargent, Daniel J., Wieand, Harry S., Haller, Daniel G., Gray, Richard, Benedetti, Jacqueline K., Buyse, Marc, Labianca, Roberto, Seitz, Jean Francois +12 more·2005·Journal of Clinical Oncology

Abstract

PURPOSE: A traditional end point for colon adjuvant clinical trials is overall survival (OS), with 5 years demonstrating adequate follow-up. A shorter-term end point providing convincing evidence to allow treatment comparisons could significantly speed the translation of advances into practice. METHODS: Individual patient data were pooled from 18 randomized phase III colon cancer adjuvant clinical trials. Trials included 43 arms, with a pooled sample size of 20,898 patients. The primary hypothesis was that disease-free survival (DFS), with 3 years of follow-up, is an appropriate primary end point to replace OS with 5 years of follow-up. RESULTS: The recurrence rates for years 1 through 5 were 12%, 14%, 8%, 5%, and 3%, respectively. Median time from recurrence to death was 12 months. Eighty percent of recurrences were in the first 3 years; 91% of patients with recurrence by 3 years died before 5 years. Correlation between 3-year DFS and 5-year OS was 0.89. Comparing control versus experimental arms within each trial, the correlation between hazard ratios for DFS and OS was 0.92. Within-trial log-rank testing using both DFS and OS provided the same conclusion in 23 (92%) of 25 cases. Formal measures of surrogacy were satisfied. CONCLUSION: In patients treated on phase III adjuvant colon clinical trials, DFS and OS are highly correlated, both within patients and across trials. These results suggest that DFS after 3 years of median follow-up is an appropriate end point for adjuvant colon cancer clinical trials of fluorouracil-based regimens, although marginally significant DFS improvements may not translate into significant OS benefits.

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Crossref · 10.1200/jco.2005.01.6071

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Authors
Sargent, D. J., Wieand, H. S., Haller, D. G., Gray, R., Benedetti, J. K., Buyse, M., Labianca, R., Seitz, J. F., O'Callaghan, C. J., Francini, G., Grothey, A., O'Connell, M., Catalano, P. J., Blanke, C. D., Kerr, D., Green, E., Wolmark, N., Andre, T., Goldberg, R. M., & De Gramont, A.
Affiliations
  • University of Siena (IT)
  • From the North Central Cancer Treatment Group, Mayo Clinic, Rochester, MN; National Surgical Adjuvant Breast and Bowel Project Statistical Center and Operations Office, Pittsburgh; Abramson Cancer Center, University of Pennsylvania, Philadelphia, PA; QUASAR Collaborative Group, Birmingham and Oxford, United Kingdom; Southwest Oncology Group Statistical Center, Seattle, WA; International Drug Development Institute, Brussels, Belgium; Ospedali Riuniti, Bergamo; University of Siena, Siena, Italy; University...
Venue
Journal of Clinical Oncology
Published
2005-12-01
Volume
23
Issue
34
Pages
8664-8670
ISSN
  • 0732-183X (ISSN-L)
  • 1527-7755
OpenAlex
W2172116130
Cited by
713
References
34
Citations by year
2026: 19 · 2025: 14 · 2024: 19 · 2023: 20 · 2022: 34 · 2021: 32 · 2020: 27 · 2019: 20 · 2018: 24 · 2017: 30 · 2016: 26 · 2015: 40 · 2014: 36 · 2013: 40 · 2012: 44
FWCI
48.43
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Clinical Oncology (publishedVersion)
  • PubMed (publishedVersion)
  • Document Server@UHasselt (UHasselt) (submittedVersion)
  • University of Birmingham Research Portal (University of Birmingham) (submittedVersion)
  • Use Siena air (University of Siena) (submittedVersion)
Funders
National Cancer Institute ((CA-25224, U10CA025224)
Topics
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods in Clinical Trials
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Treatments and Studies
  • Health Sciences › Medicine › Oncology › Colorectal Cancer Surgical Treatments
Keywords
colon cancer, adjuvant chemotherapy, disease-free survival, overall survival, primary endpoint, surrogate endpoints, hazard ratio correlation, recurrence, individual patient data pooling
MeSH terms
Aged, Antineoplastic Combined Chemotherapy Protocols, Colonic Neoplasms, Combined Modality Therapy, Female, Follow-Up Studies, Humans, Male, Middle Aged, Neoplasm Recurrence, Local, Regression Analysis, Randomized Controlled Trials as Topic, Treatment Outcome, Chemotherapy, Adjuvant, Disease-Free Survival

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