title: The influence of hospital environment on postoperative length of stay following major colorectal surgery.
abstract: BACKGROUND
  Elective colorectal resection is associated with a postoperative stay (LOS) of 7-10 days. Counties Manukau District Health Board (DHB) has two sites for elective colorectal surgery: Manukau Surgery Centre (MSC)-a stand-alone elective surgical site; and Middlemore Hospital (MMH)-a general hospital. MSC opened in 2001 and it was noted that patients recovered more quickly there than patients operated on at MMH. It was thus our aim to identify if LOS following major elective colorectal surgery is influenced by hospital environment.
  
  
  METHODS
  294 consecutive patients undergoing elective colorectal resection between January 2002 and October 2005 at the two facilities were analysed. Confounding factors (age, gender, race, duration of surgery, ASA grade, colonic vs rectal surgery, stoma/no stoma) were identified and corrected for using a multivariate Poisson log-linear regression model.
  
  
  RESULTS
  Patients who underwent surgery (colonic=227, rectal=67) at MMH (n=210, median length of stay 11 days) had a LOS 1.52 times longer (95%CI 1.28-1.81) than those who had their surgery at MSC (n=84, median length of stay 7 days). This figure was corrected for all other variables (p<0.0001).
  
  
  CONCLUSIONS
  Because MSC and MMH are both part of the same DHB, share the same surgeons, and service an identical population, it can be concluded that environmental differences are likely to be influential in the recovery process. However, further research is required to elucidate the significance of individual factors.
authors.affiliation: Department of Surgery, South Auckland Clinical School, University of Auckland, Middlemore Hospital, Otahuhu, Auckland.
authors.forename: Ryash
authors.initials: R
authors.lastname: Vather
authors.forename: Kamran
authors.initials: K
authors.lastname: Zargar-Shoshtari
authors.forename: Patricia
authors.initials: P
authors.lastname: Metcalf
authors.forename: Andrew G
authors.initials: AG
authors.lastname: Hill
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D003107:Colorectal Surgery / Q000534:rehabilitation* / Q000706:statistics & numerical data*; D017558:Elective Surgical Procedures / Q000534:rehabilitation / Q000706:statistics & numerical data; D005260:Female; D006272:Health Facility Environment / Q000706:statistics & numerical data*; D006769:Hospitals, General / Q000706:statistics & numerical data; D006801:Humans; D007902:Length of Stay / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D009520:New Zealand; D016017:Odds Ratio; D010043:Outcome and Process Assessment, Health Care; D011184:Postoperative Period; D044469:Racial Groups / Q000706:statistics & numerical data; D012189:Retrospective Studies; D013531:Surgicenters / Q000706:statistics & numerical data