title: A cohort investigation of anaemia, treatment and the use of allogeneic blood transfusion in colorectal cancer surgery.
abstract: BACKGROUND
  Preoperative identification and treatment of anaemia is advocated as part of Patient Blood Management due to the association of adverse outcome with the perioperative use of blood transfusion. This study aimed to establish the rate of anaemia identification, treatment and implications of this preoperative anaemia on ARBT use.
  
  
  METHODS
  All patients who underwent elective surgery for colorectal cancer over 18 months at a single Tertiary Centre were reviewed. Electronic databases and patient casenotes were reviewed to yield required data.
  
  
  RESULTS
  Complete data was available on 201 patients. 67% (n = 135) had haemoglobin tested at presentation. There was an inverse correlation between tumour size and initial haemoglobin (P < 0.01, Rs = -0.3). Initial haemoglobin levels were significantly lower in patients with right colonic tumours (P < 0.01). Patients who were anaemic preoperatively received a mean 0.91 units (95%CI 0-0.7) per patient which was significantly higher than non-anaemic patients (0.3 units [95%CI 0-1.3], P < 0.01). For every 1 g/dl preoperative haemoglobin increase, the likelihood of transfusion was reduced by approximately 40% (OR 0.57 [95%CI 0.458-0.708], P < 0.01). Laparoscopic surgery was associated with fewer anaemic patients transfused (P < 0.01).
  
  
  CONCLUSIONS
  Haemoglobin levels should be routinely checked at diagnosis of colorectal cancer, particularly those with large or right sided lesions. Early identification of anaemia allows initiation of treatment which may reduce transfusion risk even with modest haemoglobin rises. The correct treatment of this anaemia needs to be established.
authors.affiliation: Division of Gastrointestinal Surgery, University of Nottingham, Queen's Medical Centre, Derby Road, Nottingham NG7 2UH, UK; Department of Gastrointestinal Surgery, Nottingham University Hospitals NHS Trust, Queen's Medical Centre, Nottingham, NG7 2UH, UK.
authors.forename: Barrie D
authors.initials: BD
authors.lastname: Keeler
authors.affiliation: Department of Gastrointestinal Surgery, Nottingham University Hospitals NHS Trust, Queen's Medical Centre, Nottingham, NG7 2UH, UK.
authors.forename: Amitabh
authors.initials: A
authors.lastname: Mishra
authors.affiliation: Division of Gastrointestinal Surgery, University of Nottingham, Queen's Medical Centre, Derby Road, Nottingham NG7 2UH, UK.
authors.forename: Christiana L
authors.initials: CL
authors.lastname: Stavrou
authors.affiliation: Division of Gastrointestinal Surgery, University of Nottingham, Queen's Medical Centre, Derby Road, Nottingham NG7 2UH, UK.
authors.forename: Sophia
authors.initials: S
authors.lastname: Beeby
authors.affiliation: Division of Gastrointestinal Surgery, University of Nottingham, Queen's Medical Centre, Derby Road, Nottingham NG7 2UH, UK; Department of Gastrointestinal Surgery, Nottingham University Hospitals NHS Trust, Queen's Medical Centre, Nottingham, NG7 2UH, UK.
authors.forename: J Alastair
authors.initials: JA
authors.lastname: Simpson
authors.affiliation: Division of Gastrointestinal Surgery, University of Nottingham, Queen's Medical Centre, Derby Road, Nottingham NG7 2UH, UK; Department of Gastrointestinal Surgery, Nottingham University Hospitals NHS Trust, Queen's Medical Centre, Nottingham, NG7 2UH, UK.
authors.forename: Austin G
authors.initials: AG
authors.lastname: Acheson
keywords: Anaemia; Blood transfusion; Cancer; Preoperative; Surgery