title: Risk factors for repeat abdominal surgery in korean patients with Crohn's disease: a multi-center study of a korean inflammatory bowel disease study group.
abstract: OBJECTIVE
  The purpose of this study was to assess the risk factors for repeated abdominal surgery in Crohn's disease (CD) patients after the first abdominal surgery. Prior studies have tried to identify the risk factors for postoperative recurrence in CD patients, but the results of the studies have been inconsistent. Furthermore, few data on the risk factors for repeated abdominal surgery are available.
  
  
  METHODS
  Clinical data on CD patients who underwent abdominal surgery from January 2000 to December 2009 were collected from seventeen university hospitals and one colorectal clinic. Data from a total of 708 patients were analyzed to find the risk factors for repeated abdominal surgery in CD patients. The mean follow-up period was 72 months.
  
  
  RESULTS
  The risk of repeated abdominal surgery was 3 times higher in young patients (below 16 years old) than in older patients (odds ratio [OR], 3.056; 95% confidence interval [CI], 1.021 to 9.150); P = 0.046). Stricturing behavior at diagnosis was also a risk factor for repeated abdominal surgery (OR, 2.438; 95% CI, 1.144 to 5.196; P = 0.021). Among operative indications, only intra-abdominal abscess was associated with repeated abdominal surgery (OR, 2.393; 95% CI, 1.098 to 5.216; P = 0.028). Concerning type of operation, an ileostomy might be a risk factor for repeated abdominal surgery (OR, 11.437; 95% CI, 1.451 to 90.124; P = 0.021). Emergency surgery (OR, 4.994; 95% CI, 2.123 to 11.745; P < 0.001) and delayed diagnosis after surgery (OR, 2.339; 95% CI, 1.147 to 4.771; P = 0.019) also increased the risk of repeated abdominal surgery.
  
  
  CONCLUSIONS
  Young age (below 16 years), stricturing behavior, intra-abdominal abscess, emergency surgery, and delayed diagnosis after surgery were identified as possible risk factors for repeated abdominal surgery in CD patients.
authors.affiliation: Department of Surgery, Kyung Hee University School of Medicine, Seoul, Korea.
authors.forename: Kil Yeon
authors.initials: KY
authors.lastname: Lee
authors.forename: Chang Sik
authors.initials: CS
authors.lastname: Yu
authors.forename: Kang Young
authors.initials: KY
authors.lastname: Lee
authors.forename: Yong Beom
authors.initials: YB
authors.lastname: Cho
authors.forename: Kyu Joo
authors.initials: KJ
authors.lastname: Park
authors.forename: Gyu-Seog
authors.initials: GS
authors.lastname: Choi
authors.forename: Sang Nam
authors.initials: SN
authors.lastname: Yoon
authors.forename: Hanna
authors.initials: H
authors.lastname: Yoo