title: Prevalence of colon polyps detected by colonoscopy screening in asymptomatic black and white patients.
abstract: BACKGROUND
  Compared with white individuals, black men and women have a higher incidence and mortality from colorectal cancer and may develop cancer at a younger age. Colorectal cancer screening might be less effective in black individuals, if there are racial differences in the age-adjusted prevalence and location of cancer precursor lesions.
  
  
  OBJECTIVE
  To determine and compare the prevalence rates and location of polyps sized more than 9 mm in diameter in asymptomatic black and white individuals who received colonoscopy screening.
  
  
  METHODS
  Colonoscopy data were prospectively collected from 67 adult gastrointestinal practice sites in the United States using a computerized endoscopic report generator between January 1, 2004, and December 31, 2005. Data were transmitted to a central data repository, where all asymptomatic white (n = 80 061) and black (n = 5464) patients who had received screening colonoscopy were identified.
  
  
  METHODS
  Prevalence and location of polyps sized more than 9 mm, adjusted for age, sex, and family history of colorectal cancer in a multivariate analysis.
  
  
  RESULTS
  Both black men and women had a higher prevalence of polyps sized more than 9 mm in diameter compared with white men and women (422 [7.7%] vs 4964 [6.2%]; P < .001). Compared with white patients, the adjusted odds ratio (OR) for black men was 1.16 (95% confidence interval [CI], 1.01-1.34) and the adjusted OR for black women was 1.62 (95% CI, 1.39-1.89). Black and white patients had a similar risk of proximal polyps sized more than 9 mm (OR, 1.13;95% CI, 0.93-1.38). However, in a subanalysis of patients older than 60 years, proximal polyps sized more than 9 mm were more likely prevalent in black men (P = .03) and women (P < .001) compared with white men and women.
  
  
  CONCLUSIONS
  Compared with white individuals, black men and women undergoing screening colonoscopy have a higher risk of polyps sized more than 9 mm, and black individuals older than 60 years are more likely to have proximal polyps sized more than 9 mm.
authors.affiliation: Division of Gastroenterology, Portland VA Medical Center, 1037SW Veterans Hospital Rd, P3-GI, Portland, OR 97239, USA. lieberma@ohsu.edu
authors.forename: David A
authors.initials: DA
authors.lastname: Lieberman
authors.forename: Jennifer L
authors.initials: JL
authors.lastname: Holub
authors.forename: Matthew D
authors.initials: MD
authors.lastname: Moravec
authors.forename: Glenn M
authors.initials: GM
authors.lastname: Eisen
authors.forename: Dawn
authors.initials: D
authors.lastname: Peters
authors.forename: Cynthia D
authors.initials: CD
authors.lastname: Morris
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044383:Black People / Q000706:statistics & numerical data*; D003111:Colonic Polyps / Q000175:diagnosis* / Q000453:epidemiology*; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000517:prevention & control; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008403:Mass Screening; D008875:Middle Aged; D015995:Prevalence; D012306:Risk; D014481:United States / Q000453:epidemiology; D044465:White People / Q000706:statistics & numerical data*; D001741:Black or African American