title: OLGA and OLGIM stage distribution according to age and Helicobacter pylori status in the Korean population.
abstract: BACKGROUND
  The Operative Link for Gastritis Assessment (OLGA) and the Operative Link on Gastric Intestinal Metaplasia Assessment (OLGIM) staging systems have been suggested to provide risk assessment for gastric cancer. This study aimed to evaluate the distribution of OLGA and OLGIM staging by age and Helicobacter pylori status.
  
  
  METHODS
  We studied 632 subjects who underwent esophagogastroduodenoscopy for gastric cancer screening. Helicobacter pylori status and histologic changes were assessed using the updated Sydney system. Stage III and IV OLGA or OLGIM stages were considered as high-risk stages.
  
  
  RESULTS
  The rate of H. pylori infection was 59.0% (373/632). Overall, the proportion of high OLGA and OLGIM stages was significantly increased with older age (p < .001 for both). Old age (OR = 5.17, 6.97, and 12.23 for ages in the 40's, 50's, and 60's, respectively), smoking (OR = 2.54), and H. pylori infection (OR = 8.46) were independent risk factors for high-risk OLGA stages. These risk factors were the same for high-risk OLGIM stages. In the H. pylori-positive subgroup, the proportion of high-risk OLGA stages was low (6.9%) before the age of 40, but increased to 23.0%, 29.1%, and 41.1% for those in their 40s, 50s, and 60s, respectively (p < .001). High-risk OLGIM stages showed a similar trend of 2.8% before the age of 40 and up to 30.1% for those in their 60s. High-risk OLGA and OLGIM stages were uncommon in the H. pylori-negative group, with a respective prevalence of 10.3% and 3.4% even among those in their 60s.
  
  
  CONCLUSIONS
  Because high-risk OLGA and OLGIM stages are uncommon under the age of 40, H. pylori treatment before that age may reduce the need for endoscopic surveillance for gastric cancer.
authors.affiliation: National Cancer Center, Center for Cancer Prevention and Detection, Goyang, Korea.
authors.forename: Ji Hyung
authors.initials: JH
authors.lastname: Nam
authors.forename: Il Ju
authors.initials: IJ
authors.lastname: Choi
authors.forename: Myeong-Cherl
authors.initials: MC
authors.lastname: Kook
authors.forename: Jong Yeul
authors.initials: JY
authors.lastname: Lee
authors.forename: Soo-Jeong
authors.initials: SJ
authors.lastname: Cho
authors.forename: Su Youn
authors.initials: SY
authors.lastname: Nam
authors.forename: Chan Gyoo
authors.initials: CG
authors.lastname: Kim
mesh_terms: D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D055088:Early Detection of Cancer; D005260:Female; D005756:Gastritis / Q000453:epidemiology* / Q000382:microbiology / Q000473:pathology; D005773:Gastroscopy; D016481:Helicobacter Infections / Q000453:epidemiology* / Q000382:microbiology / Q000473:pathology; D016480:Helicobacter pylori / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D011230:Precancerous Conditions; D056910:Republic of Korea / Q000453:epidemiology; D018570:Risk Assessment; D012307:Risk Factors; D012720:Severity of Illness Index; D013274:Stomach Neoplasms / Q000175:diagnosis / Q000453:epidemiology*; D055815:Young Adult
keywords: Helicobacter pylori; Operative link for gastritis assessment staging; age; atrophic gastritis; operative link on gastric intestinal metaplasia assessment staging