title: Effect of endoscopy screening on stage at gastric cancer diagnosis: results of the National Cancer Screening Programme in Korea.
abstract: BACKGROUND
  Although gastric cancer screening is common among countries with a high prevalence of gastric cancer, there is little data to support the effectiveness of this screening. This study was designed to determine the differences in stage at diagnosis of gastric cancer according to the screening history and screening method (upper gastrointestinal series (UGIS) vs endoscopy).
  
  
  METHODS
  The study population was derived from the National Cancer Screening Programme (NCSP), a nationwide organised screening programme in Korea. The study cohort consisted of 19 168 gastric cancer patients who had been diagnosed in 2007 and who were invited to undergo gastric cancer screening via the NCSP between 2002 and 2007.
  
  
  RESULTS
  Compared with never-screened patients, the odds ratios for being diagnosed with localised gastric cancer in endoscopy-screened patients and UGIS-screened patients were 2.10 (95% CI=1.90-2.33) and 1.24 (95% CI=1.13-1.36), respectively.
  
  
  CONCLUSIONS
  Screening by endoscopy was more strongly associated with a diagnosis of localised stage gastric cancer compared with screening by UGIS.
authors.affiliation: 1] National Cancer Control Institute, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea [2] Graduate School of Cancer Science and Policy, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea.
authors.forename: K S
authors.initials: KS
authors.lastname: Choi
authors.affiliation: 1] National Cancer Control Institute, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea [2] Graduate School of Cancer Science and Policy, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea.
authors.forename: J K
authors.initials: JK
authors.lastname: Jun
authors.affiliation: National Cancer Control Institute, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea.
authors.forename: M
authors.initials: M
authors.lastname: Suh
authors.affiliation: National Cancer Control Institute, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea.
authors.forename: B
authors.initials: B
authors.lastname: Park
authors.affiliation: National Cancer Control Institute, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea.
authors.forename: D K
authors.initials: DK
authors.lastname: Noh
authors.affiliation: National Cancer Control Institute, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea.
authors.forename: S H
authors.initials: SH
authors.lastname: Song
authors.affiliation: National Cancer Control Institute, National Cancer Centre, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea.
authors.forename: K W
authors.initials: KW
authors.lastname: Jung
authors.affiliation: Department of Social Medicine, College of Medicine, Dankook University, 119, Dandae-ro, Dongnam-gu, Cheonan-si, Chungnam 330-714, Republic of Korea.
authors.forename: H-Y
authors.initials: HY
authors.lastname: Lee
authors.affiliation: Gastric Cancer Branch, Research Institute and Hospital, National Cancer Center, 323, Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea.
authors.forename: I J
authors.initials: IJ
authors.lastname: Choi
authors.affiliation: Department of Preventive Medicine and Institute of Health Services Research, College of Medicine, Yonsei University, 50-1, Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea.
authors.forename: E-C
authors.initials: EC
authors.lastname: Park
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D055088:Early Detection of Cancer / Q000379:methods*; D016099:Endoscopy, Gastrointestinal; D005260:Female; D006801:Humans; D008297:Male; D008403:Mass Screening / Q000379:methods; D008875:Middle Aged; D009367:Neoplasm Staging; D015397:Program Evaluation; D056910:Republic of Korea; D013274:Stomach Neoplasms / Q000473:pathology*