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International Journal of Clinical Oncology|October 27, 2015
Statistical challenges for central monitoring in clinical trials: a reviewKoji Oba
International Journal of Clinical Oncology|April 25, 2009
Efficacy of adjuvant chemotherapy using tegafur-based regimen for curatively resected gastric cancer: update of a meta-analysisKoji Oba
Digital Health|May 3, 2024
Handling of outcome missing data dependent on measured or unmeasured background factors in micro-randomized trial: Simulation and application studyMasahiro Kondo, Koji Oba
Pharmaceutical Statistics|March 12, 2022
Bayesian adaptive randomization design incorporating propensity score-matched historical controlsRyo Sawamoto, Koji Oba, Yutaka Matsuyama
Clinical Trials (London, England)|July 17, 2023
The net benefit for time-to-event outcome in oncology clinical trials with treatment switchingMusashi Fukuda, Kentaro Sakamaki, Koji Oba
The Tohoku Journal of Experimental Medicine|June 28, 2019
Risk-Stratified Incidence of Renal Replacement Therapy Initiation: A Longitudinal Analysis Using Medical Claims and Health Checkup DataTakehiro Sugiyama, Koji Oba, Yasuki Kobayashi
Trials|August 23, 2006
Factors associated with compliance and non-compliance by physicians in a large-scale randomized clinical trialKoji Oba, Satoshi Morita, Mahbubur Rahman, et al.
Environmental Health : a Global Access Science Source|June 6, 2024
Association of longitudinal pet ownership with wheezing in 3-year-old children using the distributed lag model: the Japan Environment and Children's StudyKota Shirato, Koji Oba, Yutaka Matsuyama, et al.
Case Reports in Gastroenterology|April 14, 2011
Left paraduodenal hernia successfully treated with laparoscopic surgery: a case reportTuyoshi Shoji, Raisuke Nishiyama, Koji Oba, et al.
Annals of Gastroenterological Surgery|June 5, 2018
Does postoperative morbidity worsen the oncological outcome after radical surgery for gastrointestinal cancers? A systematic review of the literatureHideaki Shimada, Takeo Fukagawa, Yoshio Haga, et al.
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