2015 - 2019 Individual-patient-based data meta-analysis of randomized trials in gastric cancer
2013 - 2017 Association of obesity indexes with metaboric risk factors
2013 - 2017 Re-evaluation of clinical effectiveness of four neuraminidase inhibitors against influenza viruses using molecular biology and epidemiological studies
2009 - 2010 Evaluation of validity of a surrogate variable based on the causal effect
2008 - 2010 Efficient Approaches of Case Registration and Data management in Clinical Trials
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Papers (298)：
Kota Shirato, Koji Oba, Yutaka Matsuyama, Yasuhiro Hagiwara. Association of longitudinal pet ownership with wheezing in 3-year-old children using the distributed lag model: the Japan Environment and Children's Study. Environmental health : a global access science source. 2024. 23. 1. 53-53
Akira Okada, Satoko Yamaguchi, Takahiro Imaizumi, Koji Oba, Kayo Ikeda Kurakawa, Toshimasa Yamauchi, Takashi Kadowaki, Masaomi Nangaku. Modification Effects of Albuminuria on the Association Between Kidney Function and Development of Anemia in Diabetes. The Journal of clinical endocrinology and metabolism. 2024. 109. 4. 1012-1032
Musashi Fukuda, Kentaro Sakamaki, Koji Oba. The net benefit for time-to-event outcome in oncology clinical trials with treatment switching. Clinical trials (London, England). 2023. 20. 6. 670-680
Hideo Fukuhara, Yasuhiro Hagiwara, Koji Oba, Keiji Inoue. Real-world experience with 5-aminolevulinic acid for photodynamic diagnosis of bladder cancer (3rd report): Cost impact of transurethral resection of bladder tumor in Japan. Photodiagnosis and photodynamic therapy. 2023. 44. 103758-103758
Yoshinori Kagawa, Jun Watanabe, Mamoru Uemura, Koji Ando, Akira Inoue, Koji Oba, Ichiro Takemasa, Eiji Oki. Short-term outcomes of a prospective multicenter phase II trial of total neoadjuvant therapy for locally advanced rectal cancer in Japan (ENSEMBLE-1). Annals of gastroenterological surgery. 2023. 7. 6. 968-976
Hideaki Shimada, Takeo Fukagawa, Yoshio Haga, Shin-ichi Okazumi, Koji Oba. Clinical TNM staging for esophageal, gastric, and colorectal cancers in the era of neoadjuvant therapy: A systematic review of the literature. ANNALS OF GASTROENTEROLOGICAL SURGERY. 2021. 5. 4. 404-418
Multicenter phase Ib/II study of biweekly trifluridine/tipiracil with bevacizumab combination for patients with metastatic colorectal cancer refractory to standard therapies (BITS study).
(JOURNAL OF CLINICAL ONCOLOGY 2019)
Sustained Clinical Remission after Discontinuation of Infliximab with a Raising Dose Strategy in Patients with Rheumatoid Arthritis (RRRR study): A Randomized Controlled Trial
(ARTHRITIS & RHEUMATOLOGY 2018)
SAPPHIRE: A randomized phase II study of mFOLFOX6+panitumumab versus 5-FU/LV + panitumumab after 6 cycles of frontline mFOLFOX6+panitumumab in patients with colorectal cancer.
(JOURNAL OF CLINICAL ONCOLOGY 2018)
Trial in progress: A phase II study of second-line FOLFIRI plus panitumumab after first-line FOLFOX plus panitumumab for RAS wild-type colorectal cancer with evaluation of circulating tumor DNA.
(JOURNAL OF CLINICAL ONCOLOGY 2018)
Clinical impact of postoperative surgical complications on the colorectal cancer survival and recurrence: Analyses of pooled individual patients' data from three large phase III randomized trials
(ANNALS OF ONCOLOGY 2017)
