title: Significance of colonoscope length in cecal insertion time.
abstract: BACKGROUND
  According to a previous study, a longer insertion time was associated with inadequate bowel cleansing, advanced age, constipation, surgical history, sex, and a low body mass index. However, there are only a few studies on the association between cecal insertion time and colonoscope length (long vs intermediate).
  
  
  OBJECTIVE
  To assess the association of colonoscope length and cecal insertion time.
  
  
  METHODS
  Prospective comparative trial, with systematic assignment to colonoscope length.
  
  
  METHODS
  A total of 998 colonoscopic examinations were performed by a single endoscopist, who used video colonoscopes.
  
  
  METHODS
  Cecal insertion times and their potential covariates.
  
  
  RESULTS
  The mean (+/-SEM) age was 49.06 +/- 0.4 years, 61% were men, and the mean (+/-SEM) body mass index was 24.17 +/- 2.96. The mean (+/-SEM) cecal insertion time was 4.68 +/- 0.09 minutes. Multivariate regression analysis demonstrated that sex (female, P = .000), colonoscope length (long, P = .000), increasing age (P = .000), percentage of body fat (P = .006), and inadequate bowel cleansing (P = .002) were independent factors associated with a longer insertion time.
  
  
  CONCLUSIONS
  All procedures were performed by only one gastroenterologist, so the individual characteristics of colonoscopic procedures could be affected by a consequent bias.
  
  
  CONCLUSIONS
  This large, cross-sectional study identified colonoscope length as a useful factor that affected cecal insertion time.
authors.affiliation: Department of Gastroenterology, Hanyang University Hospital, Hanyang Women's College, Seoul, Korea.
authors.forename: Hang Lak
authors.initials: HL
authors.lastname: Lee
authors.forename: Chang Soo
authors.initials: CS
authors.lastname: Eun
authors.forename: Oh Young
authors.initials: OY
authors.lastname: Lee
authors.forename: Yong Cheol
authors.initials: YC
authors.lastname: Jeon
authors.forename: Dong Soo
authors.initials: DS
authors.lastname: Han
authors.forename: Ju Hyun
authors.initials: JH
authors.lastname: Sohn
authors.forename: Byung Chul
authors.initials: BC
authors.lastname: Yoon
authors.forename: Ho Soon
authors.initials: HS
authors.lastname: Choi
authors.forename: Joon Soo
authors.initials: JS
authors.lastname: Hahm
authors.forename: Min Ho
authors.initials: MH
authors.lastname: Lee
authors.forename: Dong Hoo
authors.initials: DH
authors.lastname: Lee
authors.forename: Won
authors.initials: W
authors.lastname: Moon
authors.forename: Sang-Yeon
authors.initials: SY
authors.lastname: Kim
mesh_terms: D002432:Cecum; D020685:Colonoscopes; D003113:Colonoscopy / Q000379:methods*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013997:Time Factors