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Published on: September 20, 2019
How to improve accrual to clinical trials of symptom control 2: design issues
1Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. vickersa@mskcc.org
Abstract:
The major reason that clinical trials in integrative oncology fail is that inadequate numbers of patients are accrued. One important cause of inadequate accrual is eligibility criteria that are overly restrictive. Investigators should critically examine every single inclusion or exclusion criterion to determine whether possible benefits to the study clearly outweigh harms in terms of reduced accrual. Accrual will also be harmed if the burdens for participation--traveling to appointments, completing questionnaires--are excessive compared with the benefits for patients. In a traditional randomized trial, half of participants do not receive treatment, reducing the benefits expected by any patient. This can be offset by guaranteeing free treatment to patients in the control group after they have completed the study. Patient burden can be reduced by limiting the number of hospital visits and avoiding excessive numbers of questionnaires.
Insights
Clinical trial recruitment in integrative oncology is hindered by restrictive eligibility criteria and excessive patient burdens. Optimizing trial design by critically evaluating criteria and reducing participation demands can improve patient accrual for cancer research.
Area of Science:
- Integrative oncology
- Clinical trial design
- Patient accrual
Background:
- Clinical trials in integrative oncology frequently fail due to insufficient patient numbers.
- Overly restrictive eligibility criteria are a primary cause of poor patient accrual.
- Excessive patient participation burdens can also negatively impact recruitment.
Purpose of the Study:
- To identify key factors hindering patient accrual in integrative oncology clinical trials.
- To propose strategies for optimizing clinical trial design to improve patient recruitment.
- To ensure the benefits of participation outweigh the burdens for patients in clinical studies.
Main Methods:
- Critical examination of inclusion and exclusion criteria in clinical trial protocols.
- Assessment of patient participation burdens, including travel and data collection.
- Evaluation of strategies to enhance patient-reported benefits, such as guaranteed treatment for control groups.
Main Results:
- Restrictive eligibility criteria significantly reduce the potential patient pool.
- High patient burden, including travel and excessive questionnaires, deters participation.
- Failure to ensure perceived benefits can lead to patient withdrawal or non-participation.
Conclusions:
- Investigators must rigorously assess each criterion for its impact on accrual versus study benefit.
- Minimizing patient burden through fewer visits and streamlined data collection is crucial.
- Strategies guaranteeing treatment benefits, even for control groups, can enhance participation in oncology trials.
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