68 citations · 106 across the 3 of their papers we have counts for
3 papers
Balancing events, not patients, maximizes power of the logrank test: and other insights on unequal randomization in survival trials
Godwin Yung, Kaspar Rufibach, Marcel Wolbers +2
We revisit the question of what randomization ratio (RR) maximizes power of the logrank test in event-driven survival trials under proportional hazards (PH). By comparing three app…
Principal Stratum Strategy: Potential Role in Drug Development
Björn Bornkamp, Kaspar Rufibach, Jianchang Lin +6
A randomized trial allows estimation of the causal effect of an intervention compared to a control in the overall population and in subpopulations defined by baseline characteristi…
Assessing the Impact of COVID-19 on the Objective and Analysis of Oncology Clinical Trials -- Application of the Estimand Framework
Evgeny Degtyarev, Kaspar Rufibach, Yue Shentu +10
COVID-19 outbreak has rapidly evolved into a global pandemic. The impact of COVID-19 on patient journeys in oncology represents a new risk to interpretation of trial results and it…