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Nested consent design for clinical trials

N Hamajima1, H Yuasa, M Nakamura

  • 1Division of Epidemiology, Aichi Cancer Center Research Institute, Nagoya, Japan.

Japanese Journal of Clinical Oncology
|August 15, 1998
PubMed
Summary
This summary is machine-generated.

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A novel nested consent design improves patient understanding in clinical trials by separating follow-up consent from treatment allocation consent. This method enhances recruitment and ethical considerations for new treatment studies.

Area of Science:

  • Clinical Trials Methodology
  • Patient Recruitment Strategies
  • Informed Consent Procedures

Background:

  • Traditional randomized treatment allocation is often poorly understood by patients.
  • This lack of understanding can hinder informed consent and trial participation.
  • A new approach is needed to improve patient comprehension and engagement in clinical research.

Purpose of the Study:

  • To propose and evaluate a novel 'nested consent design' for clinical trials.
  • To enhance patient understanding and acceptance of randomized treatment allocation.
  • To improve the feasibility and ethical considerations of clinical trial designs.

Main Methods:

  • A two-step enrollment process: first for follow-up study consent, then for randomized treatment allocation consent.

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  • Detailed explanation of treatment, burdens, and outcomes before obtaining informed consent for the new treatment group.
  • Standard care for non-participants or those not allocated to the new treatment, with consistent endpoint measures and follow-up for all.

    • Main Results:

    • The nested consent design was piloted in a smoking cessation program, enrolling 324 participants out of 1330 necessary.
    • Demonstrated feasibility in a real-world setting, albeit not a formal clinical trial.
    • Indicated potential for successful application in prevention and treatment comparison trials.

    Conclusions:

    • The nested consent design is feasible for prevention trials and potentially for clinical trials comparing new vs. standard treatments.
    • This design appears ethically equivalent to one-arm study designs.
    • Offers a promising alternative for improving patient comprehension and consent in clinical research.