Trial Design Advisory
Trial designs that withstand scrutiny — from review committees to regulators
I help biotech teams and academic investigators refine statistical designs before they trigger reviewer pushback.
The goal is not cleverness — it's credibility: designs that are defensible, interpretable, and aligned with real decision-making.
This is advisory work, not outsourced execution. I step in when teams need an experienced statistical perspective to pressure-test assumptions, clarify trade-offs, and anticipate reviewer concerns.
Services
Protocol Statistical Review
Identify design risks early — before they slow you down.
A focused review of your protocol's statistical core, including endpoints, estimands, sample size rationale, and interim strategy. I flag issues that commonly trigger reviewer pushback and suggest practical refinements.
Typical use cases:
- Preparing for internal governance or scientific review
- Strengthening grant or cooperative group submissions
- Catching design inconsistencies before SAP finalization
Turnaround: typically 1–2 weeks
Sample Size & Power Consultation
Justify your design with defensible assumptions.
I help teams move beyond checkbox power calculations toward assumptions that are coherent, transparent, and aligned with the scientific question. This may include covariate adjustment strategies, alternative estimands, or simulation-based justification where appropriate.
Typical use cases:
- Trials under pressure to "do more with less"
- Reviewer skepticism around optimistic effect sizes
- Designs where conventional formulas don't tell the full story
Adaptive Design Feasibility
Determine whether complexity actually pays off.
Adaptive features can improve efficiency — or quietly introduce risk. I evaluate whether adaptations meaningfully improve operating characteristics in your setting, and when simpler designs are the better choice.
Typical considerations:
- Group sequential stopping for efficacy or futility
- Bayesian or hybrid monitoring approaches
- Response-adaptive or enrichment strategies
The output is a clear recommendation, not a default "yes."
Interim Analysis & Futility Planning
Make stopping rules interpretable, not performative.
I help design interim monitoring plans that support real decisions — balancing ethical considerations, statistical rigor, and operational feasibility.
Includes:
- Predictive or conditional power–based futility
- Alpha-spending approaches
- Bayesian posterior decision rules with calibrated operating characteristics
Who this is for
This work is a good fit if you are:
- Early-stage biotech teams (Series A/B) preparing pivotal or registrational studies with limited margin for redesign
- Academic investigators developing fundable grant proposals or cooperative group protocols
- CROs or research groups seeking independent statistical review
- Medical device or diagnostics teams navigating complex endpoints with lean biometric resources
Typical outcomes include clearer protocols, stronger reviewer responses, and fewer late-stage statistical revisions.
What this is not
This is not hourly programming, full-service trial execution, or novelty for its own sake. If you're looking for hands-on implementation support, I'm happy to suggest alternatives.
Selected advisory experience
Examples of recent work include:
- Statistical review of an adaptive oncology trial protocol
- Sample size and futility strategy for an NIH R01 submission
- Interim monitoring plan for a device feasibility study
Get in touch
If you're wrestling with a design decision — and want a second set of experienced eyes — feel free to reach out.
Email: maggie@zetyra.com
I typically respond within 48 hours.
If helpful, include:
- Your project stage
- The decision you're trying to make
- Your timeline
No forms. No obligation.