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Related Experiment Videos

Historical control withdrawal to monotherapy.

Jacqueline French

    Epilepsy Research
    |December 27, 2005
    PubMed
    Summary

    Historical controls may replace placebo arms in epilepsy drug trials. A meta-analysis found pseudo-placebo exit rates of 86.1%, suggesting their utility in future monotherapy studies.

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    Area of Science:

    • Clinical Trials
    • Neurology
    • Pharmacology

    Background:

    • Clinical trial design in epilepsy often involves active or placebo controls.
    • Neither active nor placebo controls are ideal for monotherapy epilepsy studies.
    • Historical controls, using imputed placebo data from prior trials, offer a potential alternative.

    Purpose of the Study:

    • To evaluate the feasibility of using historical controls in epilepsy clinical trials.
    • To determine if pseudo-placebo data can serve as a historical control.
    • To reduce the need for placebo or pseudo-placebo arms in future studies.

    Main Methods:

    • A meta-analysis was conducted on pseudo-placebo arms from epilepsy trials.
    • Patients with refractory epilepsy were withdrawn from previous antiepileptic drugs.
    • Patients were converted to monotherapy with a study drug using a low-dose comparator (pseudo-placebo).

    Main Results:

    • The combined percent exit rate from pseudo-placebo arms was 86.1%.
    • Confidence interval for the exit rate was 78.6% to 93.6%.
    • This high exit rate suggests a predictable outcome for pseudo-placebo groups.

    Conclusions:

    • Pseudo-placebo data can potentially serve as a historical control in epilepsy monotherapy trials.
    • This approach may eliminate the necessity for placebo or pseudo-placebo arms.
    • Historical controls offer a viable strategy for optimizing clinical trial design in epilepsy.

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