Ying Lu, PhD (Stanford University); Yuan Ji, PhD (The University of Chicago); Dehua Bi, PhD (Stanford Cancer Institute)
Project Optimus from FDA aims to shift the paradigm of oncology dose selection by emphasizing the importance of finding an optimal dose with desirable efficacy and safety. Traditionally, the optimal dose in oncology is equivalent to the maximum tolerated dose (MTD), since most oncology drugs have been cytotoxic, making the highest tolerable dose also the most efficacious dose. Due to the development of targeted and immune oncology therapeutics, MTD is no longer the default optimal dose. Statistical designs solely aimed at finding the MTD therefore cannot fulfill the requirements of Project Optimus.
This short course provides a comprehensive review and introduction to practical statistical designs for dose optimization. Attendees will be exposed to the main ideas and motivations for key innovative statistical designs and strategies, enabling them to assess the strengths and limitations of different designs for their individual needs in practice.
Session 1: Brief review of Bayesian statistics and modeling. This session will expose attendees to basic concepts and techniques of Bayesian statistics, as many designs for early-phase oncology trials are Bayesian.
Session 2: Review of key dose-finding designs. Topics include, but are not limited to, 3+3, CRM, mTPI, mTPI-2 (keyboard), BOIN, i3+3, and curve-free Bayesian decision-theoretic design (CFBD) designs. The session reviews major dose-finding designs that aim to identify the MTD/OBD and sets the stage for innovative dose-optimization strategies and designs.
Session 3: Strategies and designs for oncology dose optimization. Topics include efficacy-toxicity dose-finding designs, expansion-cohort trials, backfill designs, seamless phase 1-2 designs, PK-empowered dose finding, and randomized dose comparison.
Session 4: Q&A. Available software and tools will be illustrated throughout the short course.
Ying Lu is Professor in the Department of Biomedical Data Science and, by courtesy, in the Department of Radiology and Department of Health Research and Policy at Stanford University. He is Co-Director of the Stanford Center for Innovative Study Design and the Biostatistics Core of the Stanford Cancer Institute. Before his current position, he was Director of the VA Cooperative Studies Program Palo Alto Coordinating Center (2009-2016) and Professor of Biostatistics and Radiology at the University of California, San Francisco (1994-2009). His research areas include biostatistical methodology and applications in clinical trials, statistical evaluation of medical diagnostic tests, and medical decision-making. He serves as biostatistical associate editor for JCO Precision Oncology and co-editor of the Cancer Research Section of the New England Journal of Statistics and Data Science. Dr. Lu is an elected Fellow of the American Association for the Advancement of Science and the American Statistical Association. He initiated the Stat4Onc Annual Symposium with Dr. Ji and Dr. Kummar in 2017 and is the principal investigator of the R13 NCI grant for this conference.
Yuan Ji is Professor of Biostatistics at The University of Chicago. His research focuses on innovative Bayesian statistical methods for translational cancer research. He is the inventor of Bayesian adaptive designs such as the mTPI and i3+3 designs, which have been widely applied in dose-finding clinical trials worldwide. His work on cancer genomics was reported by numerous media outlets in 2015. He received the Mitchell Prize from the International Society for Bayesian Analysis in 2015 and is an elected Fellow of the American Statistical Association.
Dehua Bi is a biostatistician specializing in Bayesian parametric and nonparametric methods for clinical trial design, survival analysis, and machine-learning applications. He is currently a postdoctoral fellow at the Stanford Cancer Institute, jointly mentored by Dr. Ying Lu and Dr. Crystal Mackall. Dr. Bi earned his PhD from The University of Chicago under the mentorship of Dr. Yuan Ji. His research focused on developing novel Bayesian methods for information borrowing, Bayesian transfer learning, digital twins, designing early-phase clinical trials, and creating flexible sample-size estimation and adaptation approaches under the Bayesian framework.
Jie Chen, PhD (Taimei Intelligence Biopharma R&D Ltd.); Feinan Lu (IMPACT Therapeutics)
This short course describes decentralized clinical trials (DCTs), for which some or all activities are conducted outside traditional sites using digital health technologies (DHTs), such as wearables and telemedicine, for remote data collection in real-world settings. Unlike site-confined traditional clinical trials, DCTs can enhance access, recruitment, retention, diversity, and real-world evidence generation, and can be fully decentralized, hybrid, explanatory, or pragmatic.
Key elements include DHT selection using the V3 fit-for-purpose framework, AI integration, remote screening and consent, medication dispensing, data acquisition, and endpoint assessment. Regulatory guidance from FDA, ICH, and EMA emphasizes rationale, planning, DHT validation, and good clinical practice compliance. Statistical challenges include estimands, heterogeneous populations, intercurrent events such as DHT malfunctions, variability, sample size, bias, missing data, and analysis planning. Examples will address the necessity of DCTs during the COVID-19 pandemic, operational benefits, scientific questions, endpoint validation, and platform feasibility.
This short course is based on materials from Clinical Trials in the Era of Real-World Evidence by Chen, Ting, and Lu (2026, Wiley).
Jie Chen is Chairman and Chief Scientific Officer of Taimei Intelligence Biopharma R&D Ltd. With more than 30 years of experience in biopharmaceutical research and development, he has contributed to the design, analysis, and regulatory submission of more than 50 clinical trials, supporting the approval of over 10 drugs across oncology, cardiovascular, infectious diseases, and other therapeutic areas. He previously held senior roles at Merck, Merck Serono, Novartis, AstraZeneca, and Overland Pharmaceuticals. An elected Fellow of the American Statistical Association and an active leader in real-world evidence and artificial intelligence, Dr. Chen serves as an industry doctorate advisor in public health at Fudan University. He has authored more than 60 peer-reviewed papers and three books.
Feinan Lu is Director of Biometrics at IMPACT Therapeutics. She has more than 10 years of experience in biopharmaceutical research and drug development, with expertise in clinical trial design, statistical analysis, and global regulatory submissions to health authorities including the NMPA, FDA, and EMA. Her experience spans more than 10 pivotal clinical trials, and she previously worked as a statistician at Siemens Healthineers, Caidya, and Overland Pharmaceuticals. Her research interests focus on oncology clinical trial design, including adaptive designs, single-arm trials, and centralized statistical monitoring. She has been an invited speaker at industry conferences, has co-authored publications on oncology trial design and single-arm studies, and is a co-author of Clinical Trials in the Era of Real-World Evidence.
Hongtu Zhu
The rapid evolution of flexible and reusable artificial intelligence (AI) models is reshaping modern medical science. In this lecture, I introduce Causal Generalist Medical AI (Causal GMAI)—a new paradigm that integrates causal inference with generalist AI models to enhance interpretability, robustness, and generalizability in medical decision-making. Causal GMAI leverages self-supervised, semi-supervised, and supervised learning across diverse multimodal data sources, including medical imaging, electronic health records, clinical trials, laboratory measurements, genomics, knowledge graphs, and clinical text. This unified framework enables a single model to perform a broad range of clinical and translational tasks with minimal task-specific supervision. By explicitly incorporating causal reasoning, Causal GMAI moves beyond purely predictive modeling to infer underlying causal mechanisms. This capability improves diagnostic accuracy, supports more reliable treatment recommendations, and advances personalized and precision medicine. The lecture will highlight the methodological foundations, illustrative applications, and future opportunities for building trustworthy, clinically actionable AI systems.
Lu Tian (Stanford University); Hajime Uno (Harvard Medical School and Dana-Farber Cancer Institute)
Since Professor Sir David Cox introduced the proportional hazards model and its associated inference procedures in 1972, the hazard ratio (HR) has been routinely used to quantify treatment effects on time-to-event endpoints. Cox regression has also been widely used for association and prediction analyses. Ideally, a summary measure of treatment effect should be model-free so that its validity does not depend on correct specification of a statistical model. The HR, however, is not such a measure. Common alternatives based on either median failure time or the event rate at a prespecified time point are local measures and therefore do not capture the overall short- and long-term survival profile.
The validity and interpretability of the HR estimate depend on the proportional hazards assumption. When this assumption is violated, the HR estimate can be difficult, if not impossible, to interpret. The parameter estimated by the empirical HR is not simply a weighted average of the time-varying HR and generally depends on the censoring distributions. Moreover, even when the proportional hazards assumption is plausible, it can be difficult to translate a single ratio into the clinical utility of a new treatment without a reference hazard level.
This short course illustrates these limitations and presents alternative summary measures for time-to-event outcomes. It introduces the tau-year mean survival time, also known as restricted mean survival time (RMST), which represents the expected event-free time accumulated up to a prespecified time point. The course covers its interpretation, statistical inference, and applications in clinical study design and analysis. It also introduces average hazard (AH) as a complementary summary measure.
Lu Tian is Professor in the Department of Biomedical Data Science at Stanford University. He received his Doctor of Science degree in Biostatistics from Harvard University. Dr. Tian has extensive experience in statistical methodological research and study design for randomized clinical trials. He has published more than 300 research papers in statistical and clinical journals and is an elected Fellow of the American Statistical Association. His current research interests include developing statistical methods in precision medicine, meta-analysis, randomized clinical trials, and survival analysis.
Hajime Uno is an Associate Professor of Medicine at Harvard Medical School. He serves as Principal Biostatistician and Director of the Statistical Programming Core in the Division of Population Sciences at Dana-Farber Cancer Institute. Dr. Uno received his PhD in Biostatistics from Kitasato University in Japan and completed postdoctoral training at the Harvard School of Public Health. Since then, he has contributed extensively to both methodological and clinical research. His current research focuses on improving the practice of survival analysis in clinical research and promoting alternative approaches that support informed treatment decision-making.
Susan Halabi; Junki Mizusawa
Advances in molecular and genomic technologies have transformed cancer research by enabling the identification of tumor-specific biomarkers that can guide treatment selection and improve patient outcomes. These developments have fueled the growth of precision oncology and innovative clinical trial designs that evaluate targeted therapies in biomarker-defined patient populations.
Despite the increasing use of biomarkers in oncology trials, many statisticians and clinicians encounter these studies without a comprehensive understanding of the scientific, statistical, and operational challenges involved in their design, conduct, and interpretation. There is no single biomarker trial design that suits all settings. The optimal design depends on factors such as the level of evidence supporting the biomarker, disease prevalence, assay performance, and clinical objectives.
This half-day workshop provides a practical introduction to the design, conduct, and analysis of biomarker-driven clinical trials. Topics include enrichment designs, biomarker-stratified designs, adaptive biomarker strategies, basket trials, umbrella trials, and biomarker-based master protocols. Participants will learn how to select an appropriate design based on the clinical and scientific context, evaluate key statistical considerations, and address common logistical and operational challenges. The workshop emphasizes real-world applications through illustrative examples from successful oncology trials.
Ray Lin, PhD (ASA Biopharmaceutical Section and Chang Gung University); Shingo Kuroda (Takeda); Shuji Sumino (Takeda); Tadayuki Kitagawa (Takeda); Xiaolin Song, PhD (Takeda)
In oncology randomized controlled trials (RCTs), treatment switching may occur when a patient in the control arm crosses over to the investigational treatment (one-way treatment switching) or when a patient in either arm switches to subsequent therapies (two-way treatment switching), particularly upon experiencing disease progression. Such switching can introduce selection bias and time-dependent confounding, making it challenging to estimate the true treatment benefit on overall survival (OS). Consequently, advanced statistical methods are essential to control for confounding, minimize estimation bias, and ensure a robust assessment of OS.
This short course is presented by Takeda and the Oncology Treatment Switch Workstream under the American Statistical Association (ASA) Biopharmaceutical Section. Established in 2022, the ASA Workstream aims to develop a cross-pharma platform providing a comprehensive tutorial, a validated software package, and practical considerations for study design and implementation related to treatment switching.
The short course provides an overview of major statistical approaches, including the Rank-Preserving Structural Failure Time Model (RPSFTM), Inverse Probability of Censoring Weighting (IPCW), Two-Stage Estimation (TSE), and Marginal Structural Models (MSM). Participants will gain a basic understanding of how these methods work, their core assumptions, and their respective strengths and limitations. Regulatory context, practical considerations, and case studies will also be presented to guide the application of each method in actual clinical trials.
| Time | Topic |
|---|---|
| 1:00-1:20 PM | Introduction |
| 1:20-3:40 PM |
Introduction to Statistical Methods for Addressing Treatment Switching:
|
| 3:40-4:00 PM | Final Remarks |
Ray Lin is a member of the American Statistical Association (ASA) and co-leads the ASA Biopharmaceutical Section Oncology Treatment Switch Workstream. He has worked in the biopharmaceutical industry for 15 years, supporting oncology programs from first-in-human trials through regulatory approval. He participates in multiple cross-company collaborations, including the Cross-Pharma Non-Proportional Hazards Working Group, ASA Oncology Estimand Taskforce, and Friends of Cancer Research. He also serves on the officers team of the ASA San Francisco Bay Area Chapter and the Bay Area Biopharma Statistics Workshop (BBSW). He earned his PhD from Stanford University in 2010.
Shingo Kuroda is Director, Statistical & Quantitative Sciences at Takeda Pharmaceutical Company. He studied mathematical statistics at the University of Tsukuba and joined Takeda in 2009 as a biostatistician. He has supported drug development across multiple therapeutic areas, including cardiovascular, oncology, and gastroenterology, and has contributed to activities related to missing data and estimands through the Japan Pharmaceutical Manufacturers Association (JPMA). He currently leads the statistical methodology team in Japan. His research interests include estimands, causal inference, precision medicine, principal stratification, and Bayesian dynamic borrowing.
Shuji Sumino is Director of Biostatistics (Oncology) at Takeda Pharmaceutical Company. He received a Master of Engineering from Tokyo University of Science in 1998 and began his career as a biostatistician that year. He joined Takeda in 2005 and has supported drug development across a range of therapeutic areas, including cardiovascular, obesity, vaccines, and oncology. He now supports oncology drug development programs, leads biostatistical activities, and supports regulatory interactions and submissions in Japan. He serves as a JPMA representative on the ICH E20 Expert Working Group. His research interests include treatment-switching adjustment methods and multi-regional clinical trials.
Tadayuki Kitagawa is Manager of Biostatistics (Oncology) at Takeda Pharmaceutical Company. He studied mathematics at Osaka University and began his career as a biostatistician in 1995, working at Mitsubishi Tanabe Pharma and Eli Lilly Japan before joining Takeda in 2012. He has supported drug development across multiple therapeutic areas, including neuroscience, gastroenterology, and oncology, and now focuses on oncology, including regulatory submissions in Japan. His research interests include treatment-switching adjustment methods.
Xiaolin Song received his PhD from Osaka University, with a dissertation focused on Bayesian statistical computing. Since 2022, he has worked as a biostatistician at Takeda, supporting clinical studies in oncology. His current research interests include covariate adjustment in randomized studies, mediation analysis, and machine-learning methods in biostatistics.