When a combination biologic and oral immunotherapy trial for peanut allergy required more than a single randomization event, the sponsor ran into a challenge: how do you keep a trial blinded when subjects pass through three separate randomization decisions, an initial treatment assignment, a conditional re-randomization, and independent food challenge sequencing, without any one of those decisions revealing information about the others?

A single randomization event wasn’t going to be enough. The sponsor needed an IRT or RTSM platform built to manage multiple independent randomization layers, including hypothetical treatment assignments for subjects who discontinued early, while maintaining full blinding, audit-ready traceability, and dependable performance across every site.

YPrime designed and validated an integrated randomization system supporting three independent layers: the initial double-blind treatment assignment, a conditional re-randomization at the maintenance milestone, and randomized challenge-day sequencing at every food challenge visit. The maintenance-phase logic also generated a hypothetical assignment for subjects who discontinued or did not meet the dosing milestone, so intent-to-treat analysis could proceed without ever revealing a subject’s actual study status.

Run Three Randomizations Without Cross-Contamination — YPrime IRT managed the initial treatment assignment, a conditional maintenance-phase re-randomization, and independent food challenge sequencing, each layer isolated from the others.

Preserve the Blind for Every Subject, Including Those Who Don’t Advance —Hypothetical treatment assignment logic preserved blinding and supported intent-to-treat analysis for subjects who discontinued or did not meet protocol-defined milestones.

Stratify With Precision— Randomization was stratified based on screening allergen-specific antibody levels and body weight, with built-in minimum enrollment safeguards for every weight category.

Sequence Food Challenges Without Bias — Every scheduled food challenge visit received independently randomized sequencing, run separately from both treatment assignment layers.

Maintain a Fully Auditable Trail — Every allocation decision, and the data behind it, was captured for submission-ready, audit-ready traceability across sites. 

See how YPrime IRT engineered these independent randomization layers to preserve blinding, and what multi-phase randomization could do for your next complex trial.

Learn more about YPrime IRT.