title: Factors associated with incomplete colonoscopy at a Japanese academic hospital.
abstract: OBJECTIVE
  To evaluate significant risk factors for incomplete colonoscopy at a Japanese academic hospital.
  
  
  METHODS
  A total of 11812 consecutive Japanese people were identified who underwent a colonoscopy at an academic hospital. A multiple logistic regression model was used to evaluate retrospectively the significant risk factors for incomplete colonoscopy.
  
  
  RESULTS
  The cecal intubation rate was 95.0%. By univariate analysis, age, female sex, poor bowel cleansing, and a history of abdominal or pelvic surgery were significant risk factors for incomplete colonoscopy (P < 0.001). Moreover, age- and sex-adjusted analysis showed that significant risk factors for incomplete colonoscopy were female sex (OR = 1.38, 95%CI: 1.17-1.64, P = 0.0002), age ≥ 60 years old (OR = 1.44, 95%CI: 1.22-1.71, P < 0.0001), a history of prior abdominal or pelvic surgery (OR = 1.55, 95%CI: 1.28-1.86, P < 0.0001), poor bowel cleansing (OR = 4.64, 95%CI: 3.69-5.84, P < 0.0001), and inflammatory bowel disease (IBD) (OR = 1.48, 95%CI: 1.13-1.95, P = 0.0048). In Japanese men, by age-adjusted analysis, IBD (OR = 1.69, 95%CI: 1.18-2.43, P = 0.005) was an independent risk factor for incomplete colonoscopy.
  
  
  CONCLUSIONS
  Several characteristics in the Japanese population were identified that could predict technical difficulty with colonoscopy.
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Shigeo
authors.initials: S
authors.lastname: Koido
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Toshifumi
authors.initials: T
authors.lastname: Ohkusa
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Kosaburo
authors.initials: K
authors.lastname: Nakae
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Tetsuji
authors.initials: T
authors.lastname: Yokoyama
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Tomoyoshi
authors.initials: T
authors.lastname: Shibuya
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Sakamoto
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Kan
authors.initials: K
authors.lastname: Uchiyama
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Arakawa
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Taro
authors.initials: T
authors.lastname: Osada
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Akihito
authors.initials: A
authors.lastname: Nagahara
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Sumio
authors.initials: S
authors.lastname: Watanabe
authors.affiliation: Shigeo Koido, Toshifumi Ohkusa, Kan Uchiyama, Hiroshi Arakawa, Hisao Tajiri, Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Jikei University School of Medicine, Chiba 277-8567, Japan.
authors.forename: Hisao
authors.initials: H
authors.lastname: Tajiri
mesh_terms: D000046:Academic Medical Centers; D000328:Adult; D000368:Aged; D003113:Colonoscopy / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007564:Japan; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D016017:Odds Ratio; D012189:Retrospective Studies; D012307:Risk Factors
keywords: Colonoscopy; Incomplete; Inflammatory bowel disease; Intubation rates; Japanese academic hospital; Risk factors