title: Patient factors predicting the completion of sedation-free colonoscopy.
abstract: OBJECTIVE
  Colonoscopy without sedation costs less than sedated colonoscopy. The aim of this study is to identify the patient factors predicting the completion of colonoscopy without sedation.
  
  
  METHODS
  Between May and September 2005, a single colorectal surgeon performed 120 consecutive colonoscopies. Patient demographic, clinical and colonoscopy-related data were collected and analyzed.
  
  
  RESULTS
  Out of 120 colonoscopies performed, 11 were excluded due to obstruction of the colon by a tumor or poor preparation. Therefore, the study group contained 109 patients. Ninety-three (85.3%) colonoscopies were completed. Completion rate (odds ratio for completion [95% confidence interval]) was significantly associated with the male gender (5.03 [1.35-18.86]), high body mass index (4.42 [1.18-16.67]), no previous history of gynecological surgery (6.36 [1.84-22.14]), and previous colonic resection. Previous gynecological surgery was significantly associated with lower completion rates as shown using multivariate analysis. No complications relating to colonoscopy were observed.
  
  
  CONCLUSIONS
  In the majority of patients, a colorectal surgeon with adequate endoscopy experience can perform sedation-free colonoscopy successfully and safely. Gender, previous gynecological surgery, previous colonic resection, and body mass index were predictive factors for successful colonoscopy without sedation.
authors.affiliation: Department of Surgery, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Ming-Shian
authors.initials: MS
authors.lastname: Tsai
authors.forename: Yen-Hao
authors.initials: YH
authors.lastname: Su
authors.forename: Jin-Tung
authors.initials: JT
authors.lastname: Liang
authors.forename: Hong-Shiee
authors.initials: HS
authors.lastname: Lai
authors.forename: Po-Huang
authors.initials: PH
authors.lastname: Lee
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001007:Anxiety / Q000209:etiology; D003113:Colonoscopy / Q000379:methods* / Q000523:psychology; D016292:Procedural Sedation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D017288:Pain Threshold; D011446:Prospective Studies