title: A population-based comparison of 30-day readmission after surgery for colon and rectal cancer: How are they different?
abstract: BACKGROUND
  An implicit assumption in the analysis of colorectal readmission is that colon and rectal cancer patients are similar enough to analyze together. However, no studies have examined this assumption and whether substantial differences exist between colon and rectal cancer patients.
  
  
  METHODS
  This was a retrospective analysis of the differences in predictors, diagnoses, and costs of readmission between colon and rectal cancer cohorts for 30-day readmission. This study included all patients aged >18 who received an elective colectomy or low anterior resection for colorectal cancer from April 2008 until March 2012 in the province of Ontario.
  
  
  RESULTS
  Overall, 13,571 patients were identified and the readmission rates significantly differed between rectal and colon cancer patients (7.1% colon and 10.7% rectal P = 0.001). Diabetes, age, and discharge to long term care were significantly different among colon and rectal patients in the prediction of readmission. Readmission for renal and stoma causes was more prominent in the rectal cohort. The adjusted cost difference for readmission did not significantly differ between rectal and colon cancer $178 ($1,924-1,568 P = 0.84) CONCLUSION: Several important differences in predictors and diagnoses exist between the two cohorts. Conversely, the costs associated with readmission were homogenous between rectal and colon cancer patients. J. Surg. Oncol. 2016;114:354-360. © 2016 Wiley Periodicals, Inc.
authors.affiliation: Department of Surgery, McMaster University, Hamilton, Ontario, Canada.|Division of General Surgery, St. Joseph's Healthcare, Hamilton, Ontario, Canada.
authors.forename: Aristithes G
authors.initials: AG
authors.lastname: Doumouras
authors.affiliation: Department of Surgery, McMaster University, Hamilton, Ontario, Canada.|Division of General Surgery, St. Joseph's Healthcare, Hamilton, Ontario, Canada.
authors.forename: Miriam W
authors.initials: MW
authors.lastname: Tsao
authors.affiliation: Division of General Surgery, St. Joseph's Healthcare, Hamilton, Ontario, Canada.
authors.forename: Fady
authors.initials: F
authors.lastname: Saleh
authors.affiliation: Department of Surgery, McMaster University, Hamilton, Ontario, Canada.|Division of General Surgery, St. Joseph's Healthcare, Hamilton, Ontario, Canada.
authors.forename: Dennis
authors.initials: D
authors.lastname: Hong
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003082:Colectomy; D003110:Colonic Neoplasms / Q000150:complications / Q000473:pathology / Q000601:surgery*; D005260:Female; D017048:Health Care Costs; D006801:Humans; D008297:Male; D008875:Middle Aged; D009864:Ontario; D010359:Patient Readmission / Q000191:economics*; D012004:Rectal Neoplasms / Q000150:complications / Q000473:pathology / Q000601:surgery*; D012189:Retrospective Studies; D013997:Time Factors
keywords: colorectal neoplasms; costs and cost analysis; patient readmission