title: Prevalence and risk of colorectal neoplasms in asymptomatic, average-risk screenees 40 to 49 years of age.
abstract: BACKGROUND
  A paucity of information exists regarding colorectal neoplasm in asymptomatic, average-risk individuals 40 to 49 years of age.
  
  
  OBJECTIVE
  To evaluate the prevalence and risk factors of colorectal neoplasms in those in their 40s.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Results offered to subjects of a health care provider that offers screening services as part of an employer-provided wellness program.
  
  
  METHODS
  A consecutive series of 1761 asymptomatic, average-risk screenees 40 to 59 years of age.
  
  
  METHODS
  First screening colonoscopy.
  
  
  RESULTS
  The prevalence of overall colorectal neoplasm in subjects of ages 40 to 44 years, 45 to 49 years, 50 to 54 years, and 55 to 59 years increased significantly with increasing age (13.7%, 20.2%, 21.0%, and 23.8%, respectively; P < .001). The prevalence of advanced adenomas in subjects of ages 40 to 44 years, 45 to 49 years, 50 to 54 years, and 55 to 59 years increased significantly with age (1.9%, 3.0%, 3.2%, and 5.9%, respectively; P = .004). Multivariate analysis of data from the 40- to 49-year age group identified an increased risk of colorectal neoplasm associated with ages 45 years and older (odds ratio [OR], 1.68; 95% CI, 1.20-2.35), male sex (OR, 1.76; 95% CI, 1.15-2.69), presence of abdominal obesity (OR, 1.57; 95% CI, 1.12-2.21), and metabolic syndrome (OR, 1.56; 95% CI, 1.03-2.35), whereas for advanced adenomas, abdominal obesity (OR, 2.37; 95% CI, 1.06-5.27) and metabolic syndrome (OR, 2.83; 95% CI, 1.23-6.53) were the independent risk factors.
  
  
  CONCLUSIONS
  Single-center study and the cohort composed of ethnic Korean subjects who lived in the same geographic region.
  
  
  CONCLUSIONS
  In average-risk individuals 40 to 49 years of age, men with abdominal obesity or metabolic syndrome might benefit from screening colonoscopy starting at 45 years of age to detect colorectal neoplasm.
authors.affiliation: Digestive Disease Center, Department of Internal Medicine, Konkuk University School of Medicine, Gwangjin-gu, Seoul, Republic of Korea.
authors.forename: Sung Noh
authors.initials: SN
authors.lastname: Hong
authors.forename: Jeong Hwan
authors.initials: JH
authors.lastname: Kim
authors.forename: Won Hyeok
authors.initials: WH
authors.lastname: Choe
authors.forename: Hye Seung
authors.initials: HS
authors.lastname: Han
authors.forename: In Kyung
authors.initials: IK
authors.lastname: Sung
authors.forename: Hyung Seok
authors.initials: HS
authors.lastname: Park
authors.forename: Chan Sup
authors.initials: CS
authors.lastname: Shim
mesh_terms: D000328:Adult; D000367:Age Factors; D003113:Colonoscopy / Q000706:statistics & numerical data*; D015179:Colorectal Neoplasms / Q000175:diagnosis / Q000453:epidemiology* / Q000209:etiology / Q000473:pathology; D003430:Cross-Sectional Studies; D005260:Female; D006293:Health Promotion / Q000706:statistics & numerical data; D006801:Humans; D007723:Korea; D008297:Male; D008403:Mass Screening / Q000706:statistics & numerical data*; D008875:Middle Aged; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D009786:Occupational Health Services / Q000706:statistics & numerical data; D012307:Risk Factors