title: Rescreening colonoscopy practice after a negative index colonoscopy in a clinical setting; cross-sectional study for interval and outcomes of rescreening colonoscopy.
abstract: OBJECTIVE
  We evaluated the rescreening colonoscopy practice after negative index colonoscopy (IC) in a real clinical setting.
  
  
  METHODS
  We reviewed the individual records of aged over 40 who had negative IC at a single center between 2003 and 2005. The quality of the IC including bowel preparation (using Boston bowel preparation scale, BBPS), cecal intubation, withdrawal time and the incidence and risk factors for advanced lesions during the rescreening colonoscopy were analyzed.
  
  
  RESULTS
  On 1570 negative ICs, 32.6% (n = 512) had rescreen ing colonoscopy until August, 2011. The rescreened group showed significantly lower quality of the IC compared to the group not rescreened (mean BBPS 7.9 vs. 8.2, p = 0.032, mean withdrawal time 5.2 vs. 5.7 minutes, p = 0.003). Rescreening detected polyps in 33.4% (n = 171) and advanced lesions in 3.7% (n = 19, 73.7% male; p = 0.022) including cancers (0.4%, n = 2). Male gender (odds ratio, 2.995; 95% confidence interval, 1.199-7.481) was an independent risk factors for advanced lesions on rescreening.
  
  
  CONCLUSIONS
  Advanced lesions were detected in 3.7% of rescreening group after negative IC and male was a risk factor. Following a low-quality IC, a rescreening colonoscopy was performed with short interval in a clinical practice.
authors.forename: Hyun Gun
authors.initials: HG
authors.lastname: Kim
authors.forename: Seong Ran
authors.initials: SR
authors.lastname: Jeon
authors.forename: Tae Hee
authors.initials: TH
authors.lastname: Lee
authors.forename: Bong Min
authors.initials: BM
authors.lastname: Ko
authors.forename: Jin-Oh
authors.initials: JO
authors.lastname: Kim
authors.forename: Joon Seong
authors.initials: JS
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D003110:Colonic Neoplasms / Q000175:diagnosis; D003111:Colonic Polyps / Q000175:diagnosis; D003113:Colonoscopy; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013997:Time Factors