title: Distribution of the Population at Risk of Cholangiocarcinoma in Bua Yai District, Nakhon Ratchasima of Thailand Using Google Map.
abstract: BACKGROUND
  Cholangiocarcinoma (CCA), a major problem of health in Thailand, particularly in Northeastern and Northern regions, is generally incurable and rapidly lethal because of presentation in stage 3 or 4. Early diagnosis of stage 1 and 2 could allow better survival. Therefore, this study aimed to provide a distribution map of populations at risk for CCA in BuaYai district of Nakhon Ratchasima province, Northeast Thailand.
  
  
  METHODS
  A cross-sectional survey was carried out in 10 sub-districts and 122 villages, during June and November 2015. The populations at risk for CCA were screened using the Korat CCA verbal screening test (KCVST) and then risk areas were displayed by using Google map (GM).
  
  
  RESULTS
  A total of 11,435 individuals from a 26,198 population completed the KCVST. The majority had a low score of risk for CCA (1-4 points; 93.3%). High scores with 6, 7 and 8 points accounted for 1.20%, 0.13% and 0.02%. The population at risk was found frequently in sub-district municipalities, followed by sub-district administrative organization and town municipalities, (F=396.220, P-value=0.000). Distribution mapping comprised 11 layers: 1, district; 2, local administrative organization; 3, hospital; 4, KCVST opisthorchiasis; 5, KCVST praziquantel used; 6, KCVST cholelithiasis; 7, KCVST raw fish consumption; 8, KCVST alcohol consumption; 9, KCVST pesticide used; 10, KCVST relative family with CCA; and 11, KCVST naive northeastern people. Geovisual display is now available online.
  
  
  CONCLUSIONS
  This study indicated that the population at high risk of CCA in Bua Yai district is low, therefore setting a zero model project is possible. Key success factors for disease prevention and control need further study. GM production is suitable for further CCA surveillance and monitoring of the population with a high risk score in this area.
authors.affiliation: Parasitic Disease Research Unit, Suranaree University of Technology, Nakhon Ratchasima, Thailand E-mail : soraya.k@sut.ac.th.
authors.forename: Soraya J
authors.initials: SJ
authors.lastname: Kaewpitoon
authors.forename: Ratana
authors.initials: R
authors.lastname: Rujirakul
authors.forename: Amnat
authors.initials: A
authors.lastname: Sangkudloa
authors.forename: Sarochinee
authors.initials: S
authors.lastname: Kaewthani
authors.forename: Kritsakorn
authors.initials: K
authors.lastname: Khemplila
authors.forename: Karuna
authors.initials: K
authors.lastname: Cherdjirapong
authors.forename: Jirawoot
authors.initials: J
authors.lastname: Kujapun
authors.forename: Jun
authors.initials: J
authors.lastname: Norkaew
authors.forename: Wasugree
authors.initials: W
authors.lastname: Chavengkun
authors.forename: Sukanya
authors.initials: S
authors.lastname: Ponphimai
authors.forename: Poowadol
authors.initials: P
authors.lastname: Polsripradist
authors.forename: Natnapa
authors.initials: N
authors.lastname: Padchasuwan
authors.forename: Apinya
authors.initials: A
authors.lastname: Joosiri
authors.forename: Parichart
authors.initials: P
authors.lastname: Wakkhuwattapong
authors.forename: Ryan A
authors.initials: RA
authors.lastname: Loyd
authors.forename: Likit
authors.initials: L
authors.lastname: Matrakool
authors.forename: Taweesak
authors.initials: T
authors.lastname: Tongtawee
authors.forename: Sukij
authors.initials: S
authors.lastname: Panpimanmas
authors.forename: Natthawut
authors.initials: N
authors.lastname: Kaewpitoon
mesh_terms: D000328:Adult; D000368:Aged; D000818:Animals; D001650:Bile Duct Neoplasms / Q000453:epidemiology / Q000209:etiology* / Q000473:pathology; D001653:Bile Ducts, Intrahepatic / Q000469:parasitology* / Q000473:pathology; D018281:Cholangiocarcinoma / Q000453:epidemiology / Q000209:etiology* / Q000473:pathology; D003430:Cross-Sectional Studies; D005260:Female; D005500:Follow-Up Studies; D040362:Geographic Information Systems / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D009889:Opisthorchiasis / Q000150:complications* / Q000469:parasitology; D009891:Opisthorchis / Q000472:pathogenicity*; D011379:Prognosis; D012307:Risk Factors; D057386:Search Engine / Q000706:statistics & numerical data*; D013785:Thailand / Q000453:epidemiology