title: Prognostic factors in stage IB gastric cancer.
abstract: OBJECTIVE
  To identify the subset of patients with stage IB gastric cancer with an unfavorable prognosis.
  
  
  METHODS
  Overall survival (OS) rates were examined in 103 patients with stage IB (T1N1M0 and T2N0M0) gastric cancer between January 2000 and December 2011. Univariate and multivariate analyses were performed to identify risk factors using a Cox proportional hazards model.
  
  
  RESULTS
  The OS rates of patients with T1N1 and T2N0 cancer were 89.2% and 94.1% at 5-years, respectively. Both univariate and multivariate analyses demonstrated that tumor location was the only significant prognostic factor. The OS rate was 81.8% at 5-years when the tumor was located in the upper third of the stomach and was 95.5% at 5-years when the tumor was located in the middle or lower third of the stomach (P = 0.0093).
  
  
  CONCLUSIONS
  These data may suggest that tumor location is associated with survival in patients with stage IB gastric cancer.
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Toru
authors.initials: T
authors.lastname: Aoyama
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Takaki
authors.initials: T
authors.lastname: Yoshikawa
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Hirohito
authors.initials: H
authors.lastname: Fujikawa
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Hayashi
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Ogata
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Cho
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Takanobu
authors.initials: T
authors.lastname: Yamada
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Shinichi
authors.initials: S
authors.lastname: Hasegawa
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Tsuchida
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Norio
authors.initials: N
authors.lastname: Yukawa
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Oshima
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Mari S
authors.initials: MS
authors.lastname: Oba
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Morita
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Rino
authors.affiliation: Toru Aoyama, Takaki Yoshikawa, Hirohito Fujikawa, Tsutomu Hayashi, Takashi Ogata, Haruhiko Cho, Department of Gastrointestinal Surgery, Kanagawa Cancer Center, Yokohama 241-0815, Japan.
authors.forename: Munetaka
authors.initials: M
authors.lastname: Masuda
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018572:Disease-Free Survival; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D011379:Prognosis; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D012307:Risk Factors; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000401:mortality / Q000503:physiopathology*; D016896:Treatment Outcome
keywords: Gastric cancer; Prognostic factor; Stage IB