2 citations · 2 across the 6 of their papers we have counts for
6 papers
Variable Selection using Inverse Survival Probability Weighting
Masahiro Kojima
In this paper, we propose two variable selection methods for adjusting the censoring information for survival times, such as the restricted mean survival time. To adjust for the in…
Comparison of Baseline Covariate Adjustment Methods for Restricted Mean Survival Time
Keisuke Hanada, Junji Moriya, Masahiro Kojima
The restricted mean survival time is a clinically easy-to-interpret measure that does not require any assumption of proportional hazards. We focus on two ways to directly model the…
Data-Dependent Early Completion of Dose Finding Trials for Drug-Combination
Masahiro Kojima
We propose a data-dependent early completion of dose finding trials for drug-combination. The early completion is determined when a beta-binomial probability for dose retainment wi…
Adaptive design for identifying maximum tolerated dose early to accelerate dose-finding trial
Masahiro Kojima
Purpose: The early identification of maximum tolerated dose (MTD) in phase I trial leads to faster progression to a phase II trial or an expansion cohort to confirm efficacy. Metho…
Early completion based on multiple dosages to accelerate maximum tolerated dose-finding
Masahiro Kojima
Background: Phase I trials desire to identify the maximum tolerated dose (MTD) early and proceed quickly to an expansion cohort or phase II trial for efficacy. We propose an early…
Adaptive Contrast Test for Dose-Response Studies and Modeling
Masahiro Kojima
We propose a powerful adaptive contrast test with ordinal constraint contrast coefficients determined by observed responses. The adaptive contrast test can perform using easily cal…