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Clinical Trial Summary

This is a phase II randomized trial, where patients with histologically proven squamous cell carcinoma of oropharynx that have primary tumor (T3 - T4) in place, treated with curative intent chemoradiation, will be randomized to systematic mid-treatment MRI-based radiotherapy adaptation vs. standard of care. The primary objective is to compare patient-rated dysphagia (as assessed by the MD Anderson Dysphagia Inventory composite score at 6 months post-treatment in patients undergoing routine mid-treatment MR-guided radiotherapy adaptation vs. in patients receiving the current standard of care.


Clinical Trial Description

Background: Dysphagia was shown to be the main driver of adverse quality of life after head and neck radiotherapy. Over the 7-week radiotherapy course, patients with head and neck cancers undergo significant anatomical changes, including weight loss and tumor shrinkage (with complete response at mid-treatment in as high as 50% of patients). The current standard of care is to maintain the same radiotherapy plan for the entire treatment duration, unless major dosimetric deviations are detected. The use of MRI for treatment adaptation has the advantage of increased soft tissue contrast and is being integrated into several clinical practises with the recent development of MR-Linac technology. However, there is currently no demonstrated clinical advantage from the use of MRI for treatment adaptation in head and neck cancer. Primary objective: To compare patient-rated dysphagia (as assessed by the MD Anderson Dysphagia Inventory composite score at 6 months post-treatment in patients undergoing routine mid-treatment MR-guided radiotherapy adaptation vs. in patients receiving the current standard of care. Methods: This is a phase II randomized trial, where patients with histologically proven squamous cell carcinoma of oropharynx that have primary tumor (T3 - T4) in place, treated with curative intent chemoradiation, will be randomized to systematic mid-treatment MRI-based radiotherapy adaptation vs. standard of care. Patients with contra-indications to MRI will be excluded. The study will use a 2-sided, independent-sample t-test with an alpha level of 0.05 and power of 80%, with a 1:1 randomization between the 2 arms. In order to detect a 10-point improvement in the MD Anderson Dysphagia Index (MDADI) and assuming that the quality of life scores would be normally distributed with a standard deviation of 18, a total of 104 patients will be required (52 in each arm), which has been increased to 120 patients overall (60 patients in each arm) to account for a 10% dropout rate in completion of the quality of life scoring at 6 months post-treatment. An independent DSMB will review the pooled standard deviation of the interim data collected for this trial after 40 patients overall have been recruited (20 in each arm) the value of the standard deviation used to calculate the sample size required. The DSMB will inform the study team if there is potential to reduce the sample size if the standard deviation was much lower than 18 (i.e. <=15 would result in a reduction of 25% in patients required), which will potential reduce the length of the trial. Patients will be stratified by institution and recruited in blocks of 4 to ensure a balance between arms at the interim assessment. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT04901234
Study type Interventional
Source Centre hospitalier de l'Université de Montréal (CHUM)
Contact
Status Recruiting
Phase Phase 2
Start date July 30, 2021
Completion date December 2026

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