DOSAGE Study: a Multicenter Randomized Phase III Trial of Dose-Reduced Chemotherapy for Advanced Colorectal Cancer in Older Patients
Led by Leiden University Medical Center · Updated on 2024-10-16
587
Participants Needed
36
Research Sites
26 weeks
Total Duration
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Sponsors
L
Leiden University Medical Center
Lead Sponsor
D
Dutch Colorectal Cancer Group
Collaborating Sponsor
AI-Summary
What this Trial Is About
Researchers are evaluating chemotherapy dosing strategies in older patients aged 70 years and above who have metastatic colorectal cancer and are eligible for first-line palliative chemotherapy. This phase III randomized controlled trial aims to compare upfront dose-reduced chemotherapy with standard full-dose chemotherapy, focusing on progression-free survival (PFS). Patients are assessed using the Geriatric 8 (G8) questionnaire to determine their risk of chemotherapy toxicity, which guides treatment assignment. The study seeks to balance treatment effectiveness with minimizing toxicity, hospital admissions, and maintaining quality of life (QoL) and physical functioning.
Participants classified as low risk for toxicity (G8 score 15 or higher) are randomized to receive either doublet chemotherapy (a fluoropyrimidine combined with oxaliplatin) at full dose or with a 25% dose reduction upfront. Those at high risk (G8 score 14 or lower or judged high risk by their oncologist) receive fluoropyrimidine monotherapy either at full dose or with a 25% dose reduction. The study also allows the addition of targeted treatments like bevacizumab or EGFR inhibitors. Dose adjustments are made for patients with moderate kidney impairment. Chemotherapy is given orally or intravenously on schedules varying between every two and three weeks, depending on the regimen.
Participants will be closely monitored throughout treatment, with assessments including radiological or clinical evaluations for disease progression, quality of life and physical functioning questionnaires at 1, 3, 6, and 12 months, and tracking of chemotherapy toxicity, overall survival, treatment cycles, dose changes, hospital admissions, and cumulative drug dosage. Safety and cost-effectiveness will also be evaluated over an average study duration of eight months and up to one year for some outcomes. The study plans to include 587 patients and will continue until December 2028.
CONDITIONS
Brief Title
DOSAGE Study: Upfront Dose-Reduced Chemotherapy in Older Patients with Metastatic Colorectal Cancer
Who Can Participate
Age: 70Years +
All Genders
Eligibility Criteria
You may qualify if you...
Patients aged 70 years or older with colorectal cancer and distant metastases without localized treatment options.
Candidates for first-line palliative chemotherapy as judged by their treating oncologist.
Ability to understand the Dutch language.
Adequate bone marrow and organ function: Absolute neutrophil count (ANC) > 1.5 x 10^9 mmol/L, Hemoglobin (Hb) > 6.0 mmol/L, Platelets >100 x 109 / L, Serum bilirubin ≤ 2 x upper limit of normal (ULN), serum transaminases ≤ 3 x ULN without liver metastases or ≤ 5 x ULN with liver metastases.
You will not qualify if you...
Prior palliative chemotherapy.
Scheduled local treatment of metastases (e.g., liver surgery or stereotactic radiotherapy).
Candidates for triple chemotherapy.
Prior adjuvant chemotherapy within one year before study inclusion.
Complete or incomplete dihydropyrimidine dehydrogenase (DPD) deficiency.
Severe kidney failure (glomerular filtration rate ≤ 30 ml/min).
Severe cognitive deficits preventing informed consent.
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Your Study Journey
Screening
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Treatment
Duration - Approximately 8 months
Participants receive dose-reduced or full-dose chemotherapy based on their risk of treatment toxicity assessed by the G8 questionnaire. Treatment includes either fluoropyrimidine monotherapy or doublet chemotherapy with or without targeted therapies.
Regular visits every 2 to 3 weeks during chemotherapy cycles
Follow-up
Duration - Up to 1 year after treatment initiation
Participants are monitored for progression-free survival, quality of life, physical functioning, toxicity, hospital admissions, and overall survival up to at least one year after randomization.
Visits at 1, 3, 6, and 12 months after randomization
DOSAGE study: protocol for a phase III non-inferiority randomised trial investigating dose-reduced chemotherapy for advanced colorectal cancer in older patients.
Joosje C Baltussen, Frederiek van den Bos, Marije Slingerland...