OnCo
ideasIdea

Parallel real-world cohorts for sicker patients alongside every pivotal trial

Instead of excluding sicker patients entirely, trials would run a side group for them, receiving the new drug with closer monitoring, so we learn how it behaves in the people who will actually get it.

Registrational trials open a non-randomised parallel cohort for patients who fail the main eligibility on performance status (ECOG 2), organ function, or comorbidity, treated with the experimental regimen under a pre-specified safety and dose-adjustment plan, with PK sampling. Data are analysed separately and included in the label as descriptive evidence. Precedent: NCI organ-dysfunction working group studies and some sponsor expansion cohorts.

Hypothesis
Parallel cohorts will generate dosing and safety guidance for ECOG 2 and organ-impaired patients at approval in most programmes, and real-world toxicity in those groups will fall as clinicians use it.
Rationale
ECOG 2 patients are a substantial share of real-world recipients and are almost absent from trials; clinicians extrapolate from fitter patients with predictable harm.
What would test it
Sponsors open parallel cohorts in ten registrational trials; measure enrolment feasibility, the fraction generating label text, and subsequent real-world outcomes in the affected groups.
Maturity
early clinical
Who has to act
industry
Cost to try
Medium ($1M to $50M)
Years to first evidence
3
Bottlenecks it attacks

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