Daisuke Takahari1, Narikazu Boku, Junki Mizusawa, Atsuo Takashima, Yasuhide Yamada, Takayuki Yoshino, Kentaro Yamazaki, Wasaburo Koizumi, Kazutoshi Fukase, Kensei Yamaguchi, Masahiro Goto, Tomohiro Nishina, Takao Tamura, Akihito Tsuji, Atsushi Ohtsu. 1. Department of Clinical Oncology, Aichi Cancer Center Hospital, Nagoya, Japan; Department of Clinical Oncology, St. Marianna University School of Medicine, Kanagawa, Japan; JCOG Data Center, Multi-institutional Clinical Trial Support Center, National Cancer Center, Tokyo, Japan; Gastrointestinal Oncology Division, National Cancer Center Hospital, Tokyo, Japan; Department of Gastroenterology and Gastrointestinal Oncology, National Cancer Center Hospital East, Kashiwa, Japan; Division of Gastrointestinal Oncology, Shizuoka Cancer Center, Shizuoka, Japan; Department of Gastroenterology, Kitasato University School of Medicine, Sagamihara, Japan; Department of Gastroenterology, Yamagata Prefectural Central Hospital, Yamagata, Japan; Department of Gastroenterology, Saitama Cancer Center Hospital, Saitama, Japan; Cancer Chemotherapy Center, Osaka Medical College, Takatsuki, Japan; Department of Gastrointestinal Medical Oncology, National Hospital Organization Shikoku Cancer Center, Matsuyama, Japan; Division of Diabetes, Digestive and Kidney Diseases, Department of Clinical Molecular Medicine, Kobe University Graduate School of Medicine, Hyogo, Japan; Division of Medical Oncology, Kochi Health Sciences Center, Kochi, Japan.
Abstract
BACKGROUND: In advanced gastric cancer (AGC), no globally accepted prognostic scoring system has been developed. Therefore, we explored baseline prognostic factors in Japanese AGC patients using the data from a randomized controlled trial, Japan Clinical Oncology Group (JCOG) 9912, which investigated the efficacy of systemic chemotherapy as a first-line treatment. PATIENTS AND METHODS: Prognostic factors and prognostic indices for overall survival were screened and evaluated in patients enrolled in JCOG9912 using the Cox proportional hazard model. The Royal Marsden Hospital prognostic model was also applied to the JCOG9912 trial. RESULTS:A total of 650 (92.3%) of the 704 patients randomized in the JCOG9912 trial, for whom complete data were available for multivariate analyses, was included in the present study (5-fluorouracil arm, n = 215; irinotecan plus cisplatin arm, n = 216; S-1 arm, n = 219). The median survival time (MST) for all patients was 11.8 months. To construct a prognostic index, we selected four risk factors by multivariate analysis: performance status ≥ 1, number of metastatic sites ≥ 2, no prior gastrectomy, and elevated alkaline phosphatase. MSTs were 17.0 months for patients categorized into the low-risk group, who had zero or one risk factor (n = 225); 10.4 months for patients in the moderate-risk group, who had two or three risk factors (n = 368); and 5.0 months for patients in the high-risk group, who had all four risk factors (n = 57). CONCLUSION: In the present study, we propose a new prognostic index for patients with AGC. This can be used for more appropriate patient stratification in future clinical trials.
RCT Entities:
BACKGROUND: In advanced gastric cancer (AGC), no globally accepted prognostic scoring system has been developed. Therefore, we explored baseline prognostic factors in Japanese AGC patients using the data from a randomized controlled trial, Japan Clinical Oncology Group (JCOG) 9912, which investigated the efficacy of systemic chemotherapy as a first-line treatment. PATIENTS AND METHODS: Prognostic factors and prognostic indices for overall survival were screened and evaluated in patients enrolled in JCOG9912 using the Cox proportional hazard model. The Royal Marsden Hospital prognostic model was also applied to the JCOG9912 trial. RESULTS: A total of 650 (92.3%) of the 704 patients randomized in the JCOG9912 trial, for whom complete data were available for multivariate analyses, was included in the present study (5-fluorouracil arm, n = 215; irinotecan plus cisplatin arm, n = 216; S-1 arm, n = 219). The median survival time (MST) for all patients was 11.8 months. To construct a prognostic index, we selected four risk factors by multivariate analysis: performance status ≥ 1, number of metastatic sites ≥ 2, no prior gastrectomy, and elevated alkaline phosphatase. MSTs were 17.0 months for patients categorized into the low-risk group, who had zero or one risk factor (n = 225); 10.4 months for patients in the moderate-risk group, who had two or three risk factors (n = 368); and 5.0 months for patients in the high-risk group, who had all four risk factors (n = 57). CONCLUSION: In the present study, we propose a new prognostic index for patients with AGC. This can be used for more appropriate patient stratification in future clinical trials.
Entities:
Keywords:
Advanced gastric cancer; Chemotherapy; Prognostic factor; Prognostic index
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