title: Survival of Stomach Cancer Cases in Khon Kaen, Thailand 2000-2012.
abstract: BACKGROUND
  Stomach cancer is an aggressive malignancy that is difficult to detect at an early stage and therefore is characterized by poor survival rates. Over the last two decades, there has been no report of gastric cancer survival in Khon Kaen province, Thailand. The aim of this retrospective cohort study was to provide up-to-date information about the survival of gastric cancer patients in this province.
  
  
  METHODS
  Data from Khon Kaen population-based cancer registry, Faculty of Medicine, Khon Kaen University were newly obtained on 650 patients who were diagnosed with stomach cancer during the period 1 January, 2000 to 31 December, 2012. These were then followed up until death or the end of the study (31 December 2014). We calculated the observed survival with the actuarial life table method, and relative survival, defined as the ratio of observed survival in the group of the stomach cancer patients to the expected survival in the entire Thai population from the estimated generation life tables for Thailand of five-year birth cohorts from 1900 - 2000.
  
  
  RESULTS
  The 5 year observed and 5 year relative survival rates were 17.2 % (95% CI: 13.54-21.14) and 18.2 % (95% CI: 14.3-22.4), respectively. The highest 5 year relative survival rates were demonstrated among patients aged 45-65, with stage I or II lesions, with adenocarcinomas, with a body of stomach location, well differentiated and receiving surgery and/or chemotherapy.
  
  
  CONCLUSIONS
  The observed and relative survival rates were close to each other. Our findings provide basic information beneficial to development of an effective treatment system and appropriately improved population-based cancer registration.
authors.affiliation: Epidemiology and Biostatistics Section, Faculty of Public Health, Khon Kaen University, Khon Kaen, Thailand E-mail : supannee@kku.ac.th.
authors.forename: Sirinya
authors.initials: S
authors.lastname: Nanthanangkul
authors.forename: Krittika
authors.initials: K
authors.lastname: Suwanrungruang
authors.forename: Surapon
authors.initials: S
authors.lastname: Wiangnon
authors.forename: Supannee
authors.initials: S
authors.lastname: Promthet
mesh_terms: D002288:Adenocarcinoma, Mucinous / Q000453:epidemiology / Q000401:mortality* / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018279:Carcinoma, Signet Ring Cell / Q000453:epidemiology / Q000401:mortality* / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D060787:Neoplasm Grading; D009367:Neoplasm Staging; D011379:Prognosis; D012042:Registries; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000453:epidemiology / Q000401:mortality* / Q000473:pathology; D015996:Survival Rate; D013785:Thailand / Q000453:epidemiology; D013997:Time Factors; D055815:Young Adult