Survival outcome and prognostic model of patients with colorectal cancer on phase 1 trials

Audrey E. Kam, Gopichand Pendurti, Umang H. Shah, Mohammad H. Ghalib, Imran Chaudhary, Jennifer Chuy, Lakshmi Rajdev, Andreas Kaubisch, Santiago Aparo, Ioannis Mantzaris, Sanjay Goel

Research output: Contribution to journalArticle

Abstract

Background Patients with metastatic colorectal cancer (mCRC) who progress on standard therapies may be eligible for phase I trials. To better delineate the risk-benefit ratio, we assessed toxicities, clinical outcomes and prognostic factors. Methods Records of mCRC patients on phase I trials at our institution over 18 years were reviewed. Univariable (UVA) and multivariable analyses (MVA) were undertaken and a prognostic model developed. Results There were 187 enrollments on 37 phase I trials. Median age was: 59 (29–83) years and number of prior therapies: 3 (0–8). The clinical benefit rate (CBR): response (5.6%) + stable disease, was 43.1%. Median progression free survival (PFS) and overall survival (OS) was 7.7 weeks and 43.7 weeks, respectively. The MVA identified age > 60 years (HR 1.63, p < 0.004), albumin<3.5 g/dL (HR 3.69, p < 0.001), direct bilirubin>ULN (HR1.69, p < 0.01), and WBC ≥ 5.2 k/uL (HR 1.97, p < 0.001) as negative prognostic factors. A risk score based on the MVA revealed that patients with a score of 0–1 had an improved OS (58.7 weeks) compared to a score of 2 (49.9 weeks, p < 0.01) and 3 (14.1 weeks, p < 0.001). Conclusions Phase 1 trials may offer similar or better clinical outcome for mCRC patients than standard third line therapies; the prognostic model could assist in selecting appropriate patients.

Original languageEnglish (US)
Pages (from-to)490-497
Number of pages8
JournalInvestigational New Drugs
Volume37
Issue number3
DOIs
StatePublished - Jun 15 2019

Keywords

  • Colorectal cancer
  • Phase I trials
  • Survival

ASJC Scopus subject areas

  • Oncology
  • Pharmacology
  • Pharmacology (medical)

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